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Ultra-Fast High-Fidelity Computational Fluid Dynamics on GPUs for Automotive Aerodynamics

In this white paper, we present the innovative commercial GPU-based Computational Fluid Dynamics (CFD) solver Altair ultraFluidX. This work features simulations of the DrivAer model, a generic, publicly available vehicle geometry that was developed by the Chair of Aerodynamics and Fluid Mechanics at the Technical University of Munich and which is widely used for testing and validation purposes. The DrivAer model features rear end, underbody designs, and underhood flow. This model was then used to perform both wind tunnel tests and numerical simulations of the 40% scale open cooling geometry using perforated aluminum sheets with different opening ratios to mimic different radiator properties. Within, we will compare some of the results from these wind tunnel tests with numerical results obtained with Altair ultraFluidX.

MDO Director Datasheet

A multi-disciplinary optimization (MDO) approach allows you to explore all design requirements simultaneously and achieve lighter products, faster. Until now, enabling this process on live vehicle programs has been a challenge. Altair's MDO Director is a novel set of software tools that provides a process to rapidly set up, execute, post-process and explore the design of MDO problems.

White Paper: An Efficient Workflow for Composite Design & Analysis Using LAP, CoDA & Laminate Tools with HyperMesh

The task is to define optimal composite material and laminate property data, using HyperMesh in combination with Anaglyph’s composites design and analysis software tools.

FEKO Lua Script: ISAR Image Processing

The script computes and displays an inverse synthetic aperture radar (ISAR) image from backscattered radar cross section (RCS) data over frequency and angle. Windowing functions, resampling and extracting the local maxima positions to file are supported. The script requires a far field RCS request or far field RCS data imported from a file containing far field data (a .ffe file). Data imported from a .ffe file must be added manually to a 3D view.

White Paper: Manufacturing Chain Modeling with Virfac® Using HyperMesh

Running simulations before production is often a credo for many industries using manufacturing processes like welding, machining, heat treatment, etc. Virfac®, which stands for Virtual Factory, is the perfect tool to predict, anticipate and optimize the thermal & mechanical behavior of the workpiece along the entire manufacturing chain. Please see hereafter a three-step chaining process, using a HyperMesh mesh, starting with a “T-joint” welding, followed by a machining process, and finally ends with a heat treatment.

Multi-physics Electric Motor Optimization for Noise Reduction

In an electric machine, the torque is generated by electromagnetic forces which also create some parasitic vibrations of the stator. These vibrations excite the mechanical structure on which the motor is fixed and generate sound. When designing the electric machine, this aspect has to be taken into account from the start since it depends on the harmonic content of the currents that feed the machine, on the shapes of the rotor and stator, and on the interaction of the electric frequencies with the natural mechanical modes of the structure. To simulate this phenomenon, a coupling between electromagnetic calculations and vibration analysis has to be set-up. Some optimization procedure can also be added in order to reduce the noise. In what follows, it is shown how Altair HyperWorks suite; specifically FluxTM, OptiStruct®, HyperMesh® and HyperStudy® products have been successfully used to perform a multi-physics optimization for noise reduction in a fuel pump permanent magnet motor.

Model Mesher Director Datasheet

Altair's Model Mesher Director (MMD) is a fully integrated, user-friendly solution that empowers engineers to import & modify geometry and mesh models with specific mesh criteria automatically with the power of Altair HyperWorks tools. Company’s face the challenge of analyzing ever larger and more complex models.

Weld Certification Director Datasheet

Altair's Weld Certification Director (WCD) is a combination of a base software with customer specific additions and integrated services that allows engineers to accelerate the time taken to identify and analyze the performance of weld lines against mechanical requirements.

NVH Director Datasheet

Automotive Noise and Vibration Analysis involves some of the largest and most complex models being used for Finite Element Analysis. Models regularly involve millions of finite elements, with thousands of components and properties, along with the connections between those components.

Model Verification Director Datasheet

Altair's Model Verification Director (MVD) allows engineering analysts to validate CAD model data received from the design teams, automatically identifying potential issues that could slow down the pre-processing stage of the simulation life cycle. The MVD is embedded into HyperWorks pre-processing technology, HyperMesh and integrated into the Assembly Browser.

Impact Simulation Director Datasheet

Altair's Impact Simulation Director (ISD) solutions empower engineers and designers to simulate the impact performance of designs faster to cost-effectively produce higher-quality products. ISD solutions automate the laborious, manual tasks associated with model setup, analysis, post-processing and reporting.Highly tailored to an organization's specific procedures and best practices, Altair's ISD solutions reduce development time and costs while enhancing product robustness and performance.

Geomechanics Director Datasheet

Altair's Geomechanics Director (GeoD) allows engineers and scientists, especially in the Rock Mechanics and Geology groups at Oil and Gas companies, to build finite element models from subsurface geology quickly and efficiently.

Weight Analytics Datasheet

Altair's Weight Analytics (WA) solution manages the entire Weight and Balance (W&B) process empowering engineering and management teams to control and ensure W&B attributes meet program requirements. Deployed as a common weight management tool across the enterprise, WA enables faster and more accurate decision-making with on-demand access to visualize, analyze and predict W&B at any point in time during the entire Product Lifecycle (PLC).

Virtual Gauge Director Datasheet

Correlation between CAE and tests results is very strategic activity. It boosts the confidence in the development of the product. Altair’s Virtual Gauge Director (VGD) is a combination of customized software and services that enable engineers to extract the results at the exact position of the strain gauge as in the test lab, interpolate the results at an identified CAE location, compute results in the local coordinate system of the gauge, and give a correlation index confidence. The Director can also be used to interpolate stress or strain values at any placement in the model.

Automated Reporting Director Datasheet

Altair's Automated Reporting Director (ARD) empowers engineers by removing the non-value add tasks associated with the mechanics of report generation. Engineers can focus entirely on interpreting and understanding simulation results as opposed to manually creating required reports.

RAMDO - HyperStudy & OptiStruct Example

This step-by-step tutorial details how to use RAMDO with HyperStudy and OptiStruct.

White Paper: Optimizing Strain Gauge Placement with LW Finder & HyperMesh

This white paper demonstrates how to find the optimal locations to place strain gauges on a casted bracket in order to accurately measure loads.

Installation Guide: nanoFluidX 2.09

Brief installation instructions.

OptiStruct for Structural Analysis: Not Just for Optimizations Anymore

Reprint of Engineering.com article on OptiStruct as a structural analysis tool with built-in optimization capabilities

Cogging Torque Computation and Meshing for Radial Electrical Motors in Flux®

All electrical motor designers know that the computation of cogging torque is a tricky task in 3D. Indeed, the amplitude of this quantity is almost the same as the numerical noise. In most cases, a classical meshing methodology is not sufficient and specific methodology must be used. At CEDRAT, the application team, thanks to its experience has developed methodologies to successfully compute cogging torque in most of cases. This article presents a specific meshing methodology to compute cogging torque for 2D and 3D radial electrical machine. It begins with some general recommendation concerning the definition of the geometry in order to facilitate the meshing operation. Then, it presents the specific meshing methodology applied to a 2D SPM motor and to a 3D IPM motor.

How to Efficiently Design Power Transformers

Nowadays Power Transformers need to optimize their efficiency to make sure a minimum amount of losses are generated from the various physical phenomena. Flux Finite Element studies allow transformer designers to accurately analyze the different losses (Joule losses, iron losses, stray losses) to enhance the performance of their transformers. A few steady-state and transient tests permit determining the electrical and mechanical constraints that the power transformer will have to endure in its life. In addition, thermal studies can complete these analyses to detect and prevent hot spots on the tank or in the windings.

Tunnel Magnetoresistance (TMR) Angle Sensor Simulation Results

The article presents the main results of magnetostatic 3D simulation using CEDRAT Flux software especially for new TMR angle sensor applications. Such magnetic sensors are deployed today in automotive electronics, as well as in many new industrial, consumer-product, medical, avionics, defence and other applications. Under Flux 3D, several effects of the influence of magnet geometry parameters and mechanical tolerances of sensor positioning were investigated, such as airgaps and tilts effects. The results include optimum solutions useful for TMR, as well as for a wide range of other angle sensor types and applications.

Eccentricities Faults in a Rotating Machine Analyzed with Flux®

In the present energy efficiency context of electrical machines, diagnosis of rotating machines is increasingly studied. Designers seek to include the on-line, non-invasive diagnosis and typical signatures of the rotating machines faults in the stator winding currents, torque, leakage magnetic field…etc. Among the rotating machine’s faults, 7 to 10% are located in the rotor and some of these faults are eccentricities. These faults generate electromagnetic torque oscillations: electromagnetic forces acting on the stator, particularly the stator winding, which can accelerate wear of its insulation. Friction between the stator and the rotor is not excluded; this can also have an adverse effect on the bearing. In the literature we often find three types of eccentricities: static, dynamic and mixed. Our Flux 2D/3D/Skew finite element solution can be of considerable help to predict the typical signatures of eccentricities faults and the influence of these defects on the electromagnetic and vibro-acoustic performances of these machines, a very differentiating feature of the software. The purpose of this article is to show the feasibility of the different eccentricities with Flux 2D/3D/Skew thanks to the possibilities offered by mechanical sets.

Regulate Current with User Subroutine Using Groovy Language in Flux®

For Switched Reluctance Motor, a specific command of current is often used with a chopper in order to decrease the current ripple or hysteresis band. We propose to see in this example (see Figure 1) how to implement such a command in Flux using groovy language.

Finite Elements Method Modeling of Contactless Energy Transfer Systems

Contactless energy transfer (CET) systems are used in many industrial sectors. These include conveyors, trolleys, storage and retrieval units, baggage handling, battery charging stations, mobile phones and medical implants. The energy transfer model is quite similar to a conventional transformer, except for the weak coupling between the primary and secondary windings and partial or non-existent ferromagnetic closing paths. Inductive coupling is commonly used in a range from a few mW to a few hundred kW.

Cogging Torque Computation and Mesh for Non-radial Electrical Motors in Flux®

All electrical motor designers know that the computation of cogging torque is a tricky task, particularly in 3D. Indeed, the amplitude of this variable is almost the same as numerical noise. In most cases, conventional mesh methodology is not sufficient and specific methodology must be used. At CEDRAT, thanks to its experience, the application team has developed methodologies to successfully compute cogging torque in most cases. This article presents a specific mesh methodology to compute cogging torque for 3D non-radial electrical motors.

Using CEDRAT’s Tool to Review Thermal Solutions

Nowadays, it is more and more difficult to design electrotechnique devices without considering thermal stress. In more and more applications (electric vehicles, electric aircraft, etc.) there is a need to reduce weight and cost, increase efficiency, whilst maintaining security. One possibility is to increase current for the same device, and therefore how to draw away the heat. This is why conventional approximations need to be cross-checked with new tools. These new tools have to be quick and precise in order to run parametric and even optimisation analyses. Of course, thermal analysis is already available in the Flux suite for induction heating, induction hardening, forging, etc. Dedicated applications have been created to couple magnetic AC steady state to thermal transient analysis, for instance. What is new is easier and more effective coupling any type of magnetic application to thermal analysis. This article reviews what thermal analysis is, when the different tools were created, and looks at the latest advances in thermal analysis.

Comparative Study of Concentrated and Distributed Winding Using Flux®

The paper presents a comparative study of 3-phase permanent-magnet (PM) synchronous machines (PMSM) with concentrated and distributed windings. The purpose of this study is to identify the machine that gives the better electromagnetic performance (torque, efficiency, back electromotive force…). Two PMSM with concentrated and distributed windings having identical output power, stator and rotor outer diameter, airgap, axial length, are designed. Machine performance of the two machines is compared using finite element analysis (Flux 2D).

Analysis of Grounding Performances of a Car Body Using FEM Shell Elements

In the automotive domain, the EMC phenomenon of the current return occurs over a wide frequency band due to the fact that the paths followed by the current are very different between the lowest frequencies (a few Hz) and medium frequencies(hundreds of kHz).

Induction Heating and Forced Cooling Analysis with Flux®

Principle of induction heating and forced cooling (shower): induction heating is the process of heating an electrically conducting object without contact. The flowing of the current through the coil (see Fig.1) generates an alternating magnetic field. This field induces current in the electric conductor (eddy current). The repartition of eddy current depends on the shape of the electric conductor, the frequency, and physical properties of the material used in the electric conductor. In addition to this, the high frequency used in induction heating applications gives rise to a phenomenon called skin effect: all the current is concentrated only on the boundaries.

Taking Demagnetization into Account in Permanent Magnets Using Flux®

Materials can be classified according to their magnetic property into two main categories: Soft magnetic materials: which exhibit magnetic properties with the presence of external excitation. Hard magnetic materials: exhibit magnetic properties in the absence of magnetic excitation. Permanent magnets are part of this family.

FE Steady State Thermal Analysis of Squirrel Cage Induction Motors with Flux®

The thermal analysis of electrical machines and the related fluid dynamic computation, tasks associated with mechanical engineering disciplines, seem to interest electrical engineers less than electromagnetic analysis. But, with increasing requirements to fully exploit new designs and materials, it has more or less become compulsory to analyze the thermal behavior of electrical machines, to the same degree as electromagnetic design.

Checking Remanence Issues with New Hysteresis Model

Remanence is what is left when all current is removed, and there is still some flux density left in the iron core. This is often the case with a close path for flux density, especially in U or E shape devices. To get rid of this effect, it is sometimes useful to add a so-called remanent airgap. This paper explains what we have incorporated into Flux to model this effect due to hysteresis.

Eccentricities Faults Magnetic Signature of an Induction Machine Determined with Flux®

In the literature we can find two approaches to make diagnosis: Model approach - a specific method for automation engineers. Depending on the mechanism adopted, we can distinguish three branches in this method: monitoring by observers, by analytical redundancy and by parametric estimation. Signal approach - this approach is based on measurable signals data, such as current, torque, stray flux, noise and vibration, temperature. The principle of this method is to look for frequencies unique to the healthy or fault operation. Faults in electrical rotating machines can induce other phenomena such as noise and vibrations and possibly other faults like friction between the stator and the rotor or accelerated wear of insulations.

Study of Mounted Surface Permanent Magnet Synchronous Machine Using Flux® Skew

Requirements: rotating electrical machine designers want high-reliability, minimum power losses, maximum power, maximum torque and low mechanical resonance vibration and noise. To meet the needs of electrical machine designers, CEDRAT started developing tools that take Skew into account in 2003. Several improvements have been made to this tool. Skew is usually accounted for by sub-dividing the active length of the machine into several 2D slices. In the latest Skew version of Flux the post processing is directly a full 3D post-processing.

Tutorial: HW & Anaglyph Laminate Tools Integration

This document provides step-by-step instructions on how to use Anaglyph Laminate Tools within HyperWorks.

Speeding up Altair OptiStruct* Simulations with the Intel® SSD Data Center Family for PCIe*

Altair OptiStruct* provides engineers and designers with a unified solution from concept to final design by leveraging advanced analysis capabilities and novel, optimization-driven simulation. In this process, the simulation time for one optimization iteration is a critical consideration, since it affects the computational speed and scalability of the entire design process.

Less Interior Squeak and Rattle Noise Using a Simulation Driven Design Approach

In the development of new vehicles, the PSA Group aimed to detect Squeak and Rattle (S&R) problems before availability of physical testing. This led to a collaboration between PSA’s method development engineering team and Altair’s domain experts.

White Paper: One Source Solution for Short-Fiber Reinforced Materials in FEA

With use of today’s technology, FE simulation of the injection molding process is state of the art. Several unique solvers are available for this purpose. However, an appropriate coupling between the injection molding simulation and the mechanical simulation is required.

真のフロントローディングを実現するCAEツールsolidThinking Inspire

『設計者CAE』、『フロントローディング』、どちらもすでに10年以上前から提唱されている言葉である。そして,3次元CADツールには、解析機能を持つCAEのモジュールが組み込まれてきており、環境も整えられつつある。では、実際に、設計者はそれらを使用しているだろうか?

White Paper: How to Digitalize Effectively for IoT

Internet of Things (IoT) is starting to mature and organisations across many sectors are facing the challenges of scaling up from small, trial deployments and proof of concepts into mainstream, high volume consumer deployments.

White Paper: Minimization of Forming Load of Gear Driver Forging Process with AFDEX and HyperStudy

In this paper, a workflow is presented that integrates the functionalities of a metal forming simulation software, AFDEX and a multidisciplinary optimization software, HyperStudy. Using this approach, the forming load of a gear driver used in an automotive transmission is minimized and two die design parameters are optimized.

OptiStruct is 17x faster with the latest Dell Precision Workstation

The reduction of run times up to 17X is a direct result of more powerful hardware and the more advanced algorithms in Altair’s latest software releases.

Whitepaper: A Design-Validation-Production Workflow for Aerospace Additive Manufacturing

Additive manufacturing coupled with topology optimization allows the design-and-analysis and manufacturing iterations to be reduced significantly, or even eliminated. To ensure that the part will perform as simulated, a mid-stage validation is conducted on a standardized part before creating the final products.

Platform Support(稼働環境)- HyperWorks 14.0.120/220

HyperWorks 14.0.120/220(14.0.220 solver packageを含む)がサポートするプラットフォーム、OS、プロセッサー等一覧。

Dynamic Analysis of Riser Release and Lowering

S. Atluri, N. Liu, A. Sablok, and T. Weaver

VIV Prediction of a Truss Spar Pull-Tube Array Using CFD

Y. Constantinides, S. Holmes, and W. Yu

Vortex Induced Vibration Analysis of a Complex Subsea Jumper

S. Holmes, and Y. Constantinides

CFD Based Hydrodynamic Databases for Wake Interference Assessment

D. Corson, S. Cosgrove, P. Hays, Y. Constantinides , O. Oakley, H. Mukundan, and M. Leung

Numerical Wave Tank Analysis of Wave Run-Up On a Truncated Vertical Cylinder

J. Kin, S.Cosgrove, R. Jaiman, and J. O’Sullivan.

Design-Optimization of a Curved Layered Composite Panel Using Efficient Laminate Parameterization

In this paper, presented at the 2016 SAMPE Long Beach Conference, an aircraft door surround model is optimized with respect to the objectives and constraints typical for this type of component using HyperStudy and ESAComp.

Global-Local Analysis Using StressCheck, HyperMesh, HyperView and OptiStruct

This whitepaper describes the workflow for combining global and local analysis in structural development using StressCheck in combination with HyperWorks.

A Design-Validation-Production Workflow for Aerospace Additive Manufacturing

There is a lot of hype these days regarding Additive Manufacturing (AM) or 3D Printing. Are companies seriously looking at this technology to make real parts for actual applications? For the aerospace industry, the hype is starting to become more real.

Automated Parameter Tuning for Optimized Vehicle Dynamics

This paper, which was presented at the 2015 Americas ATC, demonstrates a workflow between HyperStudy, CarSim and solidThinking Compose.

Brake Noise Prediction Using Altair Multi-body Simulation

The level of noise transmitted to the passengers of a vehicle can drastically impact a passenger’s comfort. Brake noise will give the customer an impression of poor product quality and can thus damage the quality image of the company. Within the automotive industry, the study of mode coupling instability by the use of FEM and modal complex analysis is widespread to reduce this phenomenon.

RADIOSS and MADYMO Coupling Tutorial

This document explains how to set up a RADIOSS coupling model using a MADYMO dummy model.

3D プリンターの能力を最大限に引き出すAltair のトポロジー最適化テクノロジー

大量生産に向かないことや使用できる材料の種類に制限があることなどの問題があるとはいえ、型を作成する必要がなく、従来の製造手法では作成することができなかった複雑な構造物を製造することができる3Dプリンターが使用されることを最初から想定し、その特性を最大限に活用することができる設計手法が必要となる。そのような設計手法の一つとしてのトポロジー最適化についての論文。(「機械設計 5月号」第60巻 第7号掲載)

Design and optimization of a high performance C-Class catamaran with HyperWorks

Reprint of the article published on composite solutions magazine 2/2016.

Benchmark of HyperStudy Optimization Algorithms

The objective of this paper is to assess several optimization algorithms in HyperStudy for their effectiveness and efficiency. The following sections of this paper present an overview of the optimization algorithms frequently used in HyperStudy. This is followed by benchmarking of both single objective and multi-objective optimization problems, respectively.

HyperXtrude 2015による押出成形シミュレーション

ユーザビリティを大幅に向上させることに焦点を当て、ダイス設計者、現場の生産技術の専門家およびエンジニアが、金型の設計を簡単に検証することを可能にするHyperXtrudeの紹介。(軽金属 第65巻11号)

Slotted Waveguide Array

The slotted waveguide array is a popular choice for use in radar systems due to its mechanical robustness, compactness and ability to handle high power levels.

Slotted Waveguide Array

The slotted waveguide array is a popular choice for use in radar systems due to its mechanical robustness, compactness and ability to handle high power levels.

Printed Ka-band Reflectarrays with Offset Feed

Printed reflectarrays combine the advantages of parabolic reflector antennas with microstrip arrays, yielding high-gain, low-profile, low-cost antennas with simpler feeds that are easy to fabricate. This white paper demonstrates how FEKO can be used to model a printed reflectarray and its feed.

Benchmark Study: Optimizing High Fidelity Crash & Safety Simulation Performance

Cray, Intel and Altair have collaborated to analyze crash and safety simulation performance that provides engineers the power, speed and accuracy needed for their design analysis.

FEKO Integrated in HyperWorks 14.0

Altair’s computer-aided engineering (CAE) simulation software platform for simulation-driven innovation is Hyper- Works, which includes modeling, visualization, analysis and optimization technologies and solutions for structural, impact, electromagnetics, thermal, fluid, systems and manufacturing applications. The electromagnetics solver suite in HyperWorks is FEKO, a comprehensive electromagnetic analysis software used to solve a broad range of electromagnetic problems. It includes a set of hybridized solvers, giving the possibility to combine methods to solve complex and electrically large problems, with all solvers included in the same package.

Electromagnetics in Electronics

Technology advancement in the electronic industry is unyielding, but new trends will build on RF communications to drive new product functionality. Some examples include the Internet of Things (IoT), 5G mobile networks and automation/smart technology.

Electromagnetic Design in the Electronic Industry

Technology advancement in the electronic industry is unyielding, but new trends will build on RF communications to drive new product functionality. Some examples include the Internet of Things (IoT), 5G mobile networks and automation/smart technology.

Intel Solution Brief: Altair and Simulation-Driven Design

Altair and Intel offer a simple, cost-effective on-ramp to a complete simulation-driven design platform. This paper describes joint offerings including HPC and CAE in the public cloud.

Intel Solution Brief: Maximize Performance and Scalability with RADIOSS on Intel® Xeon®

This paper summarizes the findings of a benchmark project to evaluate the performance and scalability of RADIOSS on Intel® Xeon® Processor E7 v2 family-based platforms.

Seat Design for Crash in the Cloud - NAFEMS World Congress 2015

The benefit of design exploration and optimization is understood and accepted by engineers but the required intensive computational resources have been a challenge for their adoption into the design process. The HyperWorks Unlimited (HWUL) appliance provides an effective solution to these challenges as it seamlessly connects all the necessary tools together in the cloud. The aim of this study is to showcase the benefits of HWUL on an optimization driven design of a complex system. For this purpose an automotive seat design for crash loadcases is selected.

Tanker Truck Sloshing Simulation Using Bi-directionally Coupled CFD and Multi-Body Dynamics Solvers

In this work, the multi-disciplinary problem arising from fluid sloshing within a partially filled tanker truck undergoing lateral acceleration is investigated through the use of multiphysics coupling between a computational fluid dynamics (CFD) solver and a multi-body dynamics (MBD) solver. This application represents a challenging test case for simulation technology within the design of commercial vehicles and is intended to demonstrate a novel approach in the field of computer aided engineering.

Fluid - Structure Interaction Analysis and Optimization of an Automotive Component

This paper discusses the behavior of a flexible flap at the rear end of a generic car model under aerodynamic loads. A strong bidirectional coupling between the flap’s deflection and the flow field exists which requires this system to be simulated in a coupled fluid-structure manner.

Efficient Design and Analysis of Airborne Radomes



Fatigue, Composites & Optimization: Themes for Partner Presentations at the Americas Altair Technology Conference

Americas ATC 2015 had one of the highest attendance in history, with about 750+ users in a span of 3 days attending workshops and presentations. Close to half the number of partners from the APA were present to interact with customers and showcase their technologies. Sridhar highlights the key points covered in the presentations.

Computer Simulation's Role in Advancing Composite Aircraft Structures

Reprint of an article published on the December 2014 issue of Aerospace & Defense Technology magazine

Optimization Drive Design - A Desktop Engineering Sponsored Report

Optimize every stage of product development with an integrated workflow that democratizes simulation and analysis. In this Desktop Engineering sponsored report Altair's vision for product optimization is analyzed

Optimizing Cooling Passages in Turbine Blades

Turbine blades have internal passages that provide cooling during operation in a high temperature engine. The design of the cooling passages is critical to achieve near uniform temperature of the blade during operation. The temperature of the blade is dependent on the thermal properties of the blade material as well as the fluid dynamics of the air circulating in the cooling passages. Computational optimization methods have successfully been applied to design lighter and more efficient structures for many aerospace structures. An extension of these techniques is now applied to guiding the thermal design of a turbine blade by designing the optimal cooling passage layout. Optimization methods will be applied to determine the optimum pattern of the cooling passages and then to optimize the size of the individual cooling passages. The goal is to produce a more thermally efficient turbine blade design that will produce blades with longer lives and better performance.

包装貨物へのシミュレーション解析適用例(日本包装学会誌 Vol .23 No.4 2014)

包装の分野でも、設計や評価において、シミュレーション解析をうまく活用することで、「試作(金型製作を伴う場合も)→評価→不合格による手戻り」のプロセスを最小限にとどめることができるようになり、開発期間やコストの大幅な削減につなげられることが期待されている。また、実際にそういった効果が得られた事例なども報告されている。 シミュレーション解析には、用途に応じて様々な手法、ツールがあるが、ここでは「包装貨物」の評価のためにシミュレーション解析を応用した事例を二つ紹介する。

Benchmark Study: Optimized Drop Testing with Dell, Intel and Altair

Dell, Intel and Altair have collaborated to analyze a virtual drop test solution with integrated simulation and optimization analysis, delivering proven gains in speed and accuracy.

Improving the Design of Subsea Riser Systems A Cray-Altair Solution for Improved Oil & Gas Component Engineering

With Cray and Altair, engineers have the computational systems they need to perform advanced subsea computational fluid dynamics (CFD) analysis with better speed, scalability and accuracy. With Altair’s AcuSolve CFD solver running on Cray® XC30™ supercomputer systems, operators and engineers responsible for riser system design and analysis can increase component life, reduce uncertainty and improve the overall safety of their ultra-deep-water systems while still meeting their demanding development schedule.

容器設計のための流体・構造連成事例(PDF)

より高機能、より安全な容器を求めて、これまで独立に扱われてきた容器内の流体現象と容器の変形応答を同時に扱う流体・構造相関解析(FSI: Fluid-Structure Interaction)への関心は徐々に高まってきている。そこで、本論分では、FSIの基礎となる概念をまとめた上で、四つの流体・構造相関(構造・流体共に既知FSI、剛体構造変形FSI、線形弾性構造変形FSI)解析を示し、超弾性体構成則ALE(Arbitrary Lagrangian Eulerian)を用いた容器内の流体・構造相関の現状と可能性を示した。

Weld Distortion Optimisation using HyperStudy

Distortion induced in parts due to the cooling of welds complicates automated manufacturing lines in the automotive industry. The resulting deformation leads to additional investment such as end of line machining to correct affected assemblies. Utilising optimisation software a welding pattern can be found which retains the intended performance of a part while reducing the distortion induced from welding. Weld locations may be optimised alongside welding sequence to allow process requirements to be considered within the early design stage. This leads to high performance, low distortion assemblies which can ultimately be manufactured at the lowest possible cost.

【PBS日本語資料】Virtual Wind Tunnelシミュレーションの活用

外部空気力学の最適化のためのCray とAltair のソリューション

Using PBS Professional Hooks: Examples and Benefits

This paper examines practical uses of the PBS Professional® hook mechanism, to help achieve site requirements, based on experiences at The University of Queensland Research Computing Centre. The paper includes descriptions of several real-world applications for job submission hooks (qsub_hook) and includes example code to help commence implementation of a generic hook able to handle both job submission and job modification events.

Schlumberger Eclipse Integration White Paper and How-To Guide

The Schlumberger ECLIPSE software family offers the industry’s most complete and robust set of reservoir simulation software. In response to user requests, Altair has collaborated with Schlumberger to deliver a tightly integrated version of ECLIPSE for PBS Professional. This paper documents the integration and provides step-by-step instructions for configuration and use.

Daimler - Calculation of Optimal Damping Placement in a Vehicle Interior

One of the most difficult jobs of a NVH Analyst is to sift through a seemingly endless set of results and find the key conclusions that will improve a design. Different assumptions and different subsets of data can give very different conclusions. This paper compares acoustic results calculated for a Class 8 heavy duty truck cab to choose an optimal configuration of damping material. The design was evaluated for structure and air-borne inputs, but only structure-borne inputs are considered in this paper.

Automotive Development: All Eyes on CAE Weight Management

The automotive development process is still focused on objectives such as durability and crash safety, while weight is often limited to the very end of the design process. Through the establishment of the “Optimization Center” (OC) concept, Altair ProductDesign has developed an innovative design model combining performance features with weight reduction goals. This article describes the OC concept dealing with everything from the optimization of single components to an entire optimization process known as “CAE Weight Management”.

Applications of Advanced Composite Simulation and Design Optimization

Usage of fiber reinforced composite material entered an new era when leading aircraft OEMs took an unprecedented step to design and manufacture essentially full composite airframe for commercial airliners. Composite structures offer unmatched design potential as the laminate material properties can be tailored almost continuously throughout the structure. However, this increased design freedom also brings new challenges for the design process and software. Moreover, as a relatively new material, composite behaviors are more complex and less fully understood by design engineers. Therefore, reliable simulation for highly complex events like bird strike and ditching can play an important role in shortening the product design cycle. This paper showcases two area of CAE tools for composite applications. On advanced simulation, bird strike simulation with Altair RADIOSS [1] is demonstrated on an aircraft underbelly fairing. On design optimization, an airplane wing structure is designed using an innovative composite optimization process implemented in Altair OptiStruct [1-3]. OptiStruct has seen increasing adoption among aerospace OEMs, as demonstrated in the Bombardier application process described in this paper.

Scheduling Jobs onto Intel® Xeon Phi™ using PBS Professional

Working closely with Intel, Altair has ensured that PBS Professional supports the Intel® Xeon Phi™ architecture targeting high performance computing applications. This paper describes the basic and advanced configurations of PBS Professional for scheduling jobs onto Intel Xeon Phi devices.
PBS users: Download the toolkit to automate configuration of PBS for a Xeon Phi environment

PBS Professional Utilizes Intel Cluster Checker to Validate the Health of an HPC Cluster

On clusters that are Intel® Cluster Ready (ICR) certified, PBS Professional can utilize Intel® Cluster Checker for gathering real-time information about the cluster at the very moment a job has been scheduled. Using this immediate feedback, PBS Professional can ensure that a job is only being executed on a cluster that has passed a check by Intel Cluster Checker.

A Practical Analysis of Unsteady Flow Around a Bicycle Wheel, Fork and Partial Frame Using CFD

CFD is used to study air flow around a rotating bicycle wheel in contact with the ground, extending previous ‘wheel-only’ work on this problem by including the fork, head tube, top tube, down tube, caliper and brake pads. Unsteady simulations, using a Delayed Detached Eddy Simulation (DDES) turbulence model, were run for 9 different wheel and front fork configurations, over 10 different operating conditions (5 yaw angles, repeated for two different speeds, commonly encountered by cyclists), resulting in 90 transient design points.

An Aerodynamic Study of Bicycle Wheel Performance Using CFD

A methodology is presented to apply CFD to study air flow around a rotating bicycle wheel in contact with the ground. The bicycle wheel studied here is an accurate geometrical representation of a commercial racing wheel (Zipp 404). Reynolds-Averaged Navier Stokes (RANS) and Delayed Detached Eddy Simulation (DDES) results are computed at a range of speeds and yaw angles commonly encountered by cyclists. Drag and side (or lift) forces are resolved and compare favorably to experimental results obtained from wind tunnel tests. Vertical forces acting on a rotating bicycle wheel are presented for the first time. A unique transition from downward to upward acting force is observed as the yaw angle is increased. Flow structures are identified and compared for different yaw angles. It is expected that a more complete comprehension of these results will lead to improvements in the performance and handling characteristics of bicycle racing wheels used by professional cyclists and triathletes.

A Comparative Aerodynamic Study of Commercial Bicycle Wheels Using CFD

A CFD methodology is used to study the performance of several commercial bicycle wheels over a range of speeds and yaw angles. The wheels studied in this work include the Rolf Sestriere, HED H3 TriSpoke, the Zipp 404, 808 and 1080 deep rim wheels and the Zipp Sub9 disc wheel. Wheels are modeled at speeds of 20mph and 30mph, in contact with the ground, using Reynolds-Averaged Navier Stokes (RANS). Drag, vertical and side (or lift) forces are reported for each wheel. Turning moments are also calculated using the resolved side forces to examine aspects of stability and maneuverability. Drag and side forces over the range of yaw angles studied compare favorably to experimental wind tunnel results. The previously reported unique transition from downward to upward acting vertical force on the Zipp 404 wheel for increasing yaw angles is observed for all deep rim wheels and the disc wheel studied here. Wheels were also modeled at a critical yaw angle of 10 degrees using Delayed Detached Eddy Simulation (DDES) to examine the transient aspects of flows around moving bicycle wheels. It is hoped that a more complete comprehension of these results will lead to improvements in performance, safety and control of bicycle racing wheels used by amateur and professional cyclists and triathletes.

Operational Numerical Weather Prediction Job Scheduling at the Petascale

Several operational numerical weather prediction (NWP) centers will approach a petaflop of peak performance by early 2012 presenting several system operation challenges. An evolution in system utilization strategies along with advanced scheduling technologies are needed to exploit these breakthroughs in computational speed while improving the Quality of Service (QoS) and system utilization rates. The Cray XE6™ supercomputer in conjunction with Altair PBS Professional® provides a rich scheduling environment designed to support and maximize the specific features of the Cray architecture.

An Integrated Approach to Workload and Cluster Management: The HP CMU PBS Professional Connector

This paper describes the integration between Altair’s PBS Professional and HP’s Insight Cluster Management Utility (CMU), explaining how the concept of a “connector “unites these two tools to simplify cluster setup and job execution, and providing instructions for performing key PBS Professional tasks within Insight CMU. Click here to access more CMU resources.

Scheduling Jobs onto NVIDIA Tesla GPU Computing Processors using PBS Professional

With the advent of the Graphical Processing Unit (GPU) as a general-purpose computing unit, more and more customers are moving towards GPU-based clusters to run their scientific and engineering applications. This model allows users to use a CPU and GPU together in a heterogeneous computing model, where the sequential part of the application runs on the CPU and the computationally-intensive part runs on the GPU.

Hawk T Mk2 - Arrestor Barrier (BAN MK2) Engagement Analysis

As the UK Ministry of Defence (MoD) Design Authority for Aircraft Arrestor Barrier Nets, AmSafe products are used to stop aircraft from over-running the end of the runway. The British Arrestor Net (BAN) Mk2 is suspended across the runway over-run area by two electrically driven stanchions and raised or lowered by remote control from the Air Traffic Control tower. This paper describes the process and results of a FE analysis of the engagement of the Hawk T Mk2 aircraft into a Type A Barrier (BAN Mk2). The analysis was performed using RADIOSS, an advanced non-linear explicit Finite Element solver.

Evolutionary Design in Chassis Technology

This paper details the use of the Thyssenkrupp eDICT process for the design of sheet metal chassis components. eDICT (evolutionary design in chassis technology) is an innovative structured process flow for the design of optimal structures. eDICT uses the optimisation capability of Optistruct with a set of custom tools to guide and translate a design into a production feasible sheet metal solution. Fundamentally it reverses the usual design loop of CAD first then CAE assessment. The function is used to determine the design and the form follows. On recent projects eDICT has produced 25% mass reductions compared to the current series design. eDICT is also able to reduce development times and resource with an efficient solution production right from the outset.

Rapid Airbag Folding Technique for Side Curtain Airbag

TECOSIM has developed techniques which can shorten the folding & packaging process time to a few hours and still achieve the essential airbag deployment performance. We will present methods which rapidly fold a free mesh and allow for rapid shape changes for a detailed folded model. These methods can significantly reduce the turnaround time to incorporate design changes into the working CAE model for side impact and OOP [Out Of Position] studies. This technology can integrate airbag development further into the virtual world to allow ‘CAE led’ design of airbag profiles, chambers and seam lines to be established early in the design phase and establish a fully folded deployable airbag for all virtual phases.

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