Altair OptiStruct™

Optimization-enabled Structural Analysis

Drivers...Start Your Simulation? University of Texas – Arlington uses Altair SimLab™ and Altair Optistruct™ to design an adjustable pedal box for their Formula SAE racecar

Formula SAE is a collegiate design series run by Society of Automotive Engineers (SAE), which challenges students to design, build and compete with an open wheel style car across various events. The competition pitches various teams across different static events focusing on the teams engineering design decisions, cost planning, marketing strategies and vehicle inspections. The teams also have to compete under various dynamic events like acceleration, skid-pad, autocross and the endurance run where even the fuel economy is checked.

Customer Stories

OptiStruct – Nonlinear Axisymmetric Analysis

Nonlinear axisymmetric analysis with OptiStruct. Product: OptiStruct Product Version: OptiStruct 2019.0 or above Topic Objective Nonlinear axisymmetric analysis with OptiStruct. Topic Detail Analyzing a symmetrical portion of a structure means faster processing than if you modeled the whole structure.Axisymmetric CTAXI with 3 and 6 node tria-elements, where always available for linear analysis. From 2019.0 we support axisymmetric quad-elements with 4 or 8 nodes.

Tips & Tricks

OptiStruct – Mode Tracking and Rotor Energy from Complex Eigen Value Analysis

OptiStruct – Mode Tracking and Rotor Energy from Complex Eigen Value Analysis Product: OptiStruct Product Version: OptiStruct 2019.0 or above Topic Objective Mode tracking and rotor energy from complex eigen value analysis with OptiStruct. Topic Detail Mode Tracking is now available for rotor dynamics with complex eigenvalue analysis • It is mapping the mode-shapes of a system from one state to another. • Tracking is carried out using various methods shown in the below bulk card. • Assumption is that the two states are close for eigenvectors to retain orthogonality across states. • Mode-tracking in rotor dynamics tracks modes across rotor speeds and yields a much better Campbell diagram, as shown below.

Tips & Tricks

OptiStruct – Key Performance Indicator Output

OptiStruct – Key Performance Indicator Output Product Version: OptiStruct 2018.0 or above Topic Objective Key performance indicator output in OptiStruct. Topic Detail KPI (Key Performance Indicator) • OUTPUT,KPI or DISP(KPI) .kpi ascii file is output • Currently supported for linear and nonlinear static analysis • Max value for displacement/stress/strain/plastic strain based on groups by property • Stresses and strains are supported for shells and solids KPI output filtered for user specified property (Available with V 2019.1) • KPI output is limited to the grids/elements within the output sets. Set of property could be used to request the KPI output only for a list of properties. Analysis Page: Control card: OUTPUT: KPI

Tips & Tricks

OptiStruct – Section Force Output from Pretension Bolt

OptiStruct – Section Force Output from Pretension Bolt Product Version: OptiStruct 2019.0 or above Topic Objective Section force output from pretension bolt in OptiStruct. Topic Detail Section force output from pretension bolt • No need to define SECTION manually • Solids • Automatic output of SECTION results with solid pretension bolt • Out file as well as .secres file Example:

Tips & Tricks

Hyperworks X: Morphing Examples on a Turbine Blade

This brief demo shows the easy accessibility to morphing in HyperWorks X. Different examples are shown to explain, how to take advantage of Altair's morphing technology.

Videos

Hyperworks X: Design Space Management

Altair HyperWorks X introduces a very intuitive and powerful workflow to quickly generate design and non-design space for optimization runs. It also provides a library for automotive related non-design spaces, such as engine, seats, engine, sunroofs, and wheel arches. The results can be quickly altered with manipulators.

Videos

Generative Design and Topology Optimization Report

This special report by engineering.com covers two of the most talked-about trends in the product design community today: Generative Design and Topology Optimization. These simulation techniques allow customers to design lightweight and performative parts using a simulation-driven design approach.

Technical Papers, Use Cases

Revolutionizing Simulation-Driven Design with Altair SimSolid, A Technology Disruptor

Revolutionizing Simulation-Driven Design with Altair SimSolid, A Technology Disruptor! – Warren Dias, Director, Global OptiStruct Business Development, Altair SimSolid Case Study Presentation Ashish Mishra, Head-Simulation COE & Gaurav Regmi, Manager, Durability Simulation, Ather Energy

ATC Presentations

Multiphysics Optimization of Traction Motors For E-mobility

Multiphysics Optimization of Traction Motors For E-mobility Vincent Leconte, Sr. Director, Global Business Development-EM Solutions, Altair

ATC Presentations

What's New in OptiStruct 2019

Find out what's new in Altair OptiStuct 2019, THE solver for linear and nonlinear analysis.

Webinars

Welcome - Simulation Magic

Dr Royston Jones, Managing Director of Altair UK delivers and opening presentation for the country's 11th Altair Technology Conference 2019.

ATC Presentations, Videos

Aircraft Radome Multiphysics Using Simulation

Watch this webinar to see a demonstration of a multiphysics simulation approach using the Altair HyperWorks platform for the analysis of airborne radomes for electromagnetic , structural, aerodynamic, and bird strike performances.

Webinars

Taking on the Shell XPRIZE with Help from a Digital Twin

Chris Wilkinson, CTO at SMD speaks at the UK Altair Technology Conference 2019. An XPRIZE challenge is designed to source new approaches to solve difficult problems thereby disrupting existing markets or creating new ones. Our oceans cover over 70% of the planet with only 5% explored. The ocean environment is hostile and technically challenging to operate within. The Ocean Discovery XPRIZE competition was established to seek cheaper and faster solutions to survey the world’s oceans. This presentation is about one of the teams that entered the competition with a disruptive solution for ocean survey. The emerging role and importance of a digital twin is explored to support the solution as it scales from proof of concept to one that is fully industrialised.

ATC Presentations, Videos

Solving Problems in Product Design in Aerospace

Robert Fox, Engineering Associate Fellow at Rolls-Royce presents at the UK Altair Technology Conference 2019. This presentation provides some background on Rolls-Royce products and how CAE has changed the way in which such complex products are certified as being safe to fly. The presentation then moves on to outline some ways in which CAE is now being employed earlier in the design process to develop the next generation of aircraft engines. It concludes with some background on how Rolls-Royce engages with students and Universities engaging in CAE projects.

ATC Presentations, Videos

Development of Carbon Fibre Floor Structure for the NIO Electric SUV

NIO are a global automotive startup producing electric vehicles for the China market. Our second vehicle, the ES6, was unveiled in December 2018 in Shanghai. It features a lightweight carbon fibre rear floor body structure, which will become the first high volume CFRP production part in ASIA. This presentation describes the CAE activities undertaken to develop the composite body structure. It explains the approach that was taken to construct and validate the material cards and the various material tests involved. It explores the various CAE activities used to develop and optimise the design of the parts and the layups of composite layers, and then the successful validation of the parts.

ATC Presentations, Presentations

Using Advanced Simulation to Design Leading Motorcycles

Rod Giles, Group Manager CAE & CAD presents at the UK ATC 2019. Royal Enfield has and is undergoing a massive transformation, not only in the sales and manufacturing departments, but also in the way the motorcycles are designed and developed. Leading the way in the development of all new motorcycle platforms is the use of advanced Computer Aided Engineering (CAE) tools. At Royal Enfield we use a wide array of different tools and techniques. The primary tool for model preparation and analysis is Altair Hyperworks. Rather than trying to cover the vast range of analyses carried out, today I will concentrate on some examples where advanced techniques have helped the design process including using smooth particle hydrodynamics (SPH) in explicit analysis to evaluate fuel tank integrity, using NVH director to evaluate and improve transfer path analysis (TPA) to aid the rider comfort, using topology optimisation to reduce mass and improve structural performance of engine and chassis components, and using MotionSolve to understand complex mechanism dynamics.

ATC Presentations, Videos

Empowering Designers with Predictive Simulation Technology

Jon Heath, Lead Mechanical Engineer at Brompton Bicycle presents at the UK ATC 2019. The Brompton bicycle has been engineered over many years using very much traditional engineering development methods. Introducing FEA tools and methods into the development process has allowed Brompton to reduce development time and improve early stage design robustness.

This presentation details how the company has implemented the Altair Inspire, SimSolid and HyperWorks suites into its development process, enabling its design team to find problems quickly and correct them before prototyping.

ATC Presentations, Videos

Additive Manufacturing, Lattice Structures and Advanced Simulation: the Good, the Bad & the Ugly

Simon Jones, Technical Director at HiETA presents at the UK ATC 2019. Additive Manufacturing (AM) offers huge potential to create structures and designs that are not realisable through conventional manufacturing methods, and deliver real engineering benefit. HiETA will talk about our experience of developing complex thermal management structures using AM, some of the potential benefits and opportunities it affords, and how new advanced simulation software from Altair is addressing some of the industry needs around it.

ATC Presentations, Videos

Development of the Next Generation Civil Tiltrotor

Leonardo’s Product Roadmap and the Associated Design Challenges. The Multi-Disciplinary Requirements of Tiltrotor & Other Lightweighting Studies.

This is a keynote presentation from the UK Altair Technology Conference 2019 by David Matthew, Lead Engineer at Leonardo. David joined Westland Helicopters as an undergraduate trainee in 1990, studying Mechanical Engineering at Imperial College and joining the Stress Office following graduation. Since then, David has worked within the airframe structure system group on a range of military and civil helicopter projects including the AW101 and AW189 helicopters, becoming a lead specialist in fatigue and damage tolerance, structural analysis, testing, and qualification. On the AW189 project, he led the analysis and qualification activities from preliminary design through to certification.

For the last year, David has been the Structures Lead Engineer for the Next Generation Civil Tilt Rotor project. This is a collaborative research project, which is part of the European Union Clean Sky 2 programme. This project is to develop technologies to support a large tiltrotor aircraft and to demonstrate these on a test demonstrator aircraft.

ATC Presentations, Videos

Build, Verify & Optimise a Body-in-White Structure in a Working Day

Dr. Tayeb Zeguer, Group Tech Leader APD, Advanced CAE at Jaguar Land Rover presents at the UK Altair Technology Conference 2019. A Design exploration, loadpath studies, material selection and heavy usage of Optimisation are key to the development of a lightweight and efficient Body-In-White (BIW) structure. Nevertheless, the fast pace of vehicle development makes it a challenge to do such CAE work fast enough to drive the design and the decision making. This is why the C2 phase of the Altair C123 process is the ultimate weapon to drive the design in a fast and reliable manner. By using low fidelity models, the C2 phase allows quick iterations, large DOEs and complex optimisation studies to be executed within minutes and have a large impact on design and strategy decisions.

The natural starting point for the C2 process is the supply of a C1 layout model with associated CAD packaging data. However, another entry point is the availability of a high fidelity finite element model from a previous program. The initial activity is the rapid development of a C2 model which can generate a reliable and good quality results. This is the reason why Altair has developed various tools to ease the process of creating “ready to optimise” low fidelity models. Thanks to a highly automated series of tools combined with highly advanced optimisation technology, it is now possible to build, verify and optimise a BIW model for Noise, Vibration and Harshness (NVH) and Crash in a single working day.

ATC Presentations, Videos

OptiStruct - Equivalent Plastic Strain Response for Optimization

Equivalent plastic strain can be used as an internal response when a nonlinear response optimization is run using the equivalent static load method. This is made possible through the use of an approximated correlation between linear strain and plastic strain, which are calculated in the inner and outer loops respectively, of the ESL method.

Tips & Tricks

OptiStruct - Contact Pressure, Force as a Response for Optimization

Contact Pressure can be used as an internal response when a model with contact and optimization is run. Contact pressure response is activated using RTYPE=CNTP option. The PTYPE should be set to CONTACT and the corresponding CONTACT Bulk Data ID(s) can be referenced on the ATTi field.

Tips & Tricks

OptiStruct - Failure Response for Topology Optimization

Factor of Safety (FOS) and margin of safety (MOS) optimization responses are now available for Topology optimization. It is calculated using NORM approach on design domain. All optimization types are now supported including Topology.

Tips & Tricks

OptiStruct - Neuber Optimization Response in Nonlinear Subcase

Neuber Stress and Neuber Strain sensitivities are supported for optimization in small displacement NLSTAT. It was already supported for optimization in FASTCONT analysis. It is supported only for small displacement analysis, it is not supported for large displacement. Once Neuber response is defined, the material will be treated as linear and MATS1 props are used only for Neuber correction. It is supported for solids as well as shells. It is supported for all optimization types except topology & freesize optimization.

Tips & Tricks

OptiStruct - Manufacturing Constraints for Composite Optimization

Certain manufacturing constraints are important when designing composite laminates, like balancing of plies, thickness of plies, etc. ln OptiStruct, manufacturing constraints can be defined during free size optimization, shuffling optimization for a better manufacturability and desired stacking sequence. The following are some of the manufacturing constraints which can be used depending on the requirement.

Tips & Tricks

Guerrilla Gravity

For pioneering a new material application and technology without a road map, Guerrilla Gravity used Altair OptiStruct in the early design design phase. The result was the development of lightweight, high-performance bikes, that are 300% more impact resistant than other frames on the market that use traditional carbon fiber materials, at significant cost savings and shortened timelines.

Customer Stories

Altair HyperWorks Defense Brochure

HyperWorks is a wide-ranging set of engineering analysis and optimization tools that is used throughout every major industry. See how HyperWorks is used for Defense in this brochure.

Brochures

E-motor Design using Multiphysics Optimization

Today, an e-motor cannot be developed just by looking at the motor as an isolated unit; tight requirements concerning the integration into both the complete electric or hybrid drivetrain system and perceived quality must be met. Multi-disciplinary and multiphysics optimization methodologies make it possible to design an e-motor for multiple, completely different design requirements simultaneously, thus avoiding a serial development strategy, where a larger number of design iterations are necessary to fulfill all requirements and unfavorable design compromises need to be accepted.

The project described in this paper is focused on multiphysics design of an e-motor for Porsche AG. Altair’s simulation-driven approach supports the development of e-motors using a series of optimization intensive phases building on each other. This technical paper offers insights on how the advanced drivetrain development team at Porsche AG, together with Altair, has approached the challenge of improving the total design balance in e-motor development.

Customer Stories, Technical Papers

5 ways to optimize your design

Gauge optimization, size and shape, and shell optimization, can be used to improve an existing design without altering its overall architecture. 3D topology optimization can be used when a significant re-design is desired because it identifies the optimal load paths of a structure and recommend material reduction. The material layout produced in the 3D topology is then interpreted into a concept design which is dimensioned and fine-tuned with the gauge, size, and shape approaches resulting in a final structure. Do you want to learn how to execute all the techniques mentioned? Step-by-step tutorials are available now for download!

Tips & Tricks

A Unique Car Concept for Urban Space

Udi Meridor, Chief Innovation Officer at Israeli startup, City Transformer, talks about the thinking behind the design of this revolutionary design for urban transport. They have decided to rethink the future of the city car and create a cleaner world.

Customer Stories, Videos

Duratec

Czech company Duratec Ltd. develops handmade bike frames using both aluminium and composite materials. For a recent project at Duratec presenting the latest approach in development of carbon fiber optimization of the bike frame, Altair HyperWorks was used for model creation in Altair HyperMesh, optimized via the Altair OptiStruct code and evaluated in Altair HyperView in the development and optimization of a lightweight composite racing bike frame.

Customer Stories

Griiip

Israeli motorsport company Griiip has designed a new, fast and professional race car that combines efficiency in racing with a competitive purchase price and low running costs, to make it more affordable. By harnessing the power of data, Griiip has created the first smart connected race car – the G1 – and with it, an entirely new racing series. Accessing the software via Altair's new Startup Program, Griiip engineers employ several products from the Altair HyperWorks™ suite, among these Altair Radioss™ for crash simulation, Altair OptiStruct™ for structural optimization, general FE analysis as well as Altair HyperMesh™ and Altair HyperView™ for pre- and post-processing tasks in the development of race cars.

Customer Stories

Flat Panel Post-Buckling Analysis with Implicit Method using OptiStruct

Many commercial aircraft are designed so that fuselage skins can elastically buckle below limit load and continue to operate safely and efficiently. This design regime makes for a very lightweight semi-monocoque structure compared to a non-buckling design. Therefore, predicting the local buckling, post-buckling behavior, and failures are critical to design and optimization of this kind of structure. The local panels buckle in a combination of compression and shear. Excess compression is redistributed to surrounding axial members (frames and stringers) and shear is continued to be carried by the buckled panels via tension parallel to the buckle waves. The compression redistribution and diagonal tension put special strength considerations on all involved structural components. This post-buckling behavior and the analysis method are both called intermediate diagonal tension (IDT).

Technical Papers

Improving E-Motor Acoustics with Seamless Multiphysics Simulation

Discover Altair SimLab's automated workflow for coupled electromagnetic and vibration analysis. SimLab uses Altair Flux for electromagnetic analysis and Altair OptiStruct for vibro-acoustic simulation.

Webinars

HyperWorks for Aerospace Applications v2017

The HyperWorks for Aerospace self-paced course covers the critical processes used in the creation of FEA models in the Aerospace industry. This course contains 12 modules covering aspects from model setup to post processing. Each module contains background information on the tools used and practical exercises with recorded demonstrations to help you get familiar with the tools and processes. Note: This course requires a login to Connect to view.

eLearning

Introduction to OptiStruct for Structural Optimization

The purpose of this self paced course is to cover the basics of OptiStruct Optimization. The course contains modules introducing the basic optimization types and giving an over of each. Many exercises are available in the modules that use the See It, Try It methodology. See It allows you to watch a video demonstration of the exercise covered in the section, while Try It gives you a pdf and model to try it in the software on your own. Note: This course requires a login to Connect to view.

eLearning

Introduction to OptiStruct for Linear Analysis

The purpose of this self paced course is to cover the basic topics for OptiStruct Linear Analysis. The Setup sections will use the See It, Try It, Do It methodology to cover the concepts. See It allows you to watch a video demonstration of the exercise covered in the section. Note: This course requires a login to Connect to view.

eLearning

Altair HyperWorks Brochure

Altair HyperWorks is the most comprehensive, open architecture CAE simulation platform in the industry, offering the best technologies to design and optimize high performance, weight efficient and innovative products.

Brochures

OptiStruct Lessons Learned from a Cambered Structure with Welds made Post-Decambering using Modchg

Problem Description - A pre-cambered trailer is loaded to nearly flat under 1g down by a permanent payload (large steel transformer oil reservoir box). - As the payload is loaded, the trailer is 'de-cambered." They payload is then welded in place to the trailer. - Other operational load cases are applied as the subsequent load cases to the de-cambering load. Topology optimization is conducted with responses from both de-cambering load case and subsequent load cases. - All subsequent analysis must take into account the de-cambering held in place by the welds. The de-camber is a "large displacement" formulation and the loading happens via sliding contact with the payload box.

Tips & Tricks

HyperWorks for Aerospace Applications v13

The HyperWorks for Aerospace self paced course covers the critical processes used in the creation of FEA models in the Aerospace industry. This course contains 12 modules covering aspects from model setup to post processing. Each module contains background information on the tools used and practical exercises with recorded demonstrations to help you get familiar with the tools and processes. Note: This course requires a Connect login to view.

eLearning

AVL Fire - CFD for IC Engine Development

Introducing Fire M - The easy way to efficient CFD

Videos

Magneto-Vibro-Acoustic Efficient Design of PWM-Fed Induction Machines

Induction motors are widely used in the automotive industry. In order to increase the passenger’s comfort, motor designers try to develop new solutions to reduce the noise at its origin, on the electromagnetic side. Damper winding can be a solution to improve emitted vibration and noise. In this presentation, LSEE shows interesting modelling method to evaluate the impact of damper windings on the vibro-acoustic behavior of the motor considering PWM, and compares it with measurements. * Please note this technology is patented / WO 2016207166 A1* An LSEE & Altair presentation at SIA-CTTM Automotive NVH Comfort 2018

Presentations

Sharda Motors – Usage of Altair CAE Solution for Durability Analysis

Sharda Motor Industries Limited (SMIL) is the market leader in the country in the manufacturing of exhaust systems, catalytic converters, independent suspension systems, seat frames, seat covers (two and four wheelers), soft top canopies, and stamped part for white goods products. Their state-of-the-art manufacturing facilities help them to continuously focus on new products, innovation, technology upgradation, and research & development. The facility seamlessly caters to various emission norms ranging from BS4, BS6, and Tier 4.

Customer Stories

Lushan Primary School

Tucked away in a remote location in the mountains, designed by ZHA, the Lushan primary school, when complete, will be an educational institute located 160 kilometers North-West of Nanchang, the capital of China’s Jiangxi province.

Customer Stories

ICAT Meets Automotive Safety and Regulatory Requirements with Altair Simulation Software

ICAT is one of the leading centres for testing, R&D, design, development and validation in support of a Government of India funded initiative to develop facilities for automotive testing & development. To meet the challenges of the automotive industry, they need to employ optimization to decrease vehicle weight while maintaining proper strength. For a major challenge for the rollover testing for bus industry, they used Altair Radioss for roll over simulation and Altair OptiStruct for optimization leading to shortened development time for their customers by over 50%.

Video Testimonials

Providing Designers Easy Access to Powerful Simulation Tools

Brompton Bicycle discuss the benefits they have seen from moving away from simulation in their CAD system to a more powerful and flexible system from Altair.

Customer Testimonials

SOGECLAIR aerospace

SOGECLAIR aerospace, part of the SOGECLAIR S.A. group, is a major engineering partner and prime contractor for the aerospace industry. For the design of an aircraft access door, to leverage the full potential of the combined methods of additive manufacturing and casting, SOGECLAIR used the Altair HyperWorks software suite for the design and optimization of the door.

Customer Stories, Customer Testimonials

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