altair hpc & cloud offerings: a key enabler for multi-physics - americas atc 2015 workshop

Innovation Intelligence®

Multi-body Simulation Workshop

Cinco de Mayo, 2015

Keshav Sundaresh

Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 2

Agenda

11:00 – 11:10 Introduction

11:10 – 11:30 Altair Multi-body Solution for the Automotive Industry:

Vision & Roadmap

11:30 – 11:50 3D contacts For Automotive Applications

11:50 – 12:10 Technical Overview – MotionSolve For Auto Chassis,

Body & Components

12:10 – 12:30 Automotive Bushing Solution

12:30 – 01:15 Hands-on Session (Room 106) | Live Demo

01:15 – 01:30 Interactive Session, Summary & Conclusion


MotionSolve In the Automotive Industry

• Chassis Solutions

• Body Solutions

• Components

• Conclusion


Chassis: Suspension Design

Model:

Built-in vehicle library supporting many vehicle

components and front & rear suspensions

Solve:

Full set of K&C events

User-defined events

Evaluate:

Automated Suspension Design Factors report

Automated plotting and animation

Improve:

HyperStudy for system DOE & Optimization

ESLM for component optimization (OptiStruct)

GM, Chrysler, US Army (TARDEC), Volvo, Tesla, Mahindra, Chery, Geely


Chassis: Vehicle Dynamics

Model:

Easily assemble full vehicles using

wizard. Full support for many driver,

road &tire models

Solve:

Full set of industry standard open- &

closed-loop handling events

Evaluate:

Automated calculation of metrics

Easy plotting and animation

Improve:

HyperStudy for DOE & Optimization

GM, Chrysler, Volvo, Tesla, Mahindra, Chery, Geely, Metalsa

Image credit: Bremar Auto


Chassis: Vehicle Components

GUI for easy creation & modification

Property files for component data

A/Car property file compatibility

(Tiem Orbit)

Unit conversion of property file data

to model units

Entity Function

Bushing Elastically mount suspension arms, links,

sub-frames, engines, gearboxes, etc. to

vehicle chassis

Bump-stop Limit suspension bump or jounce travel

Damper Dissipate energy stored in springs and

damp chassis motions.

Rebound-stop Limit suspension rebound travel

Spring Limit forces in suspension components

and isolate chassis by absorbing energy

from vertical road inputs

Tire Generate forces for steering,

accelerating, and braking. Isolate the

vehicle from small road irregularities


Chassis: Tire Models Supported In MotionSolve

MotionSolve also supports user defined tire models via TYDEX STI

Author Model Application

MF-Tyre Handling

FTIRE Ride/Durability

CD-TIRE Handling/Ride/Durability

MF-SWIFT Ride


Chassis: Durability

Model:

Enhance chassis models with flex bodies, rough

roads, hi-fidelity tires, “realistic” bushings and

dampers (co-simulation with Simulink)

Solve:

Complete set of road loads for all components

Automated utility to map MBD loads to FE

Evaluate:

Examine stress history, identify hot spots

Compute fatigue life

Improve:


ESLM for component optimization

Toyota, Honda, Hyundai, MAN, FDTE, DANA, TATA Daewoo, Ducati,

Piaggio, Mahindra, Bajaj


Chassis: Road Models Supported In MotionSolve

Road Type Supplier Works with:

2D

Flat,

Sinusoidal,

etc.,

COSIN HTire & FTire

3D - RGRRectangular

GridCOSIN FTire

3D-RSMRoad Surface

Model Fraunhofer CDTire

3D - CRGCurved

Regular GridOpencrg.org

MF-Tyre,

MF-Swift,

CDTire, FTire

User Written

Road

(Subroutine)

User Defined User All Tires

Point Contact Line Contact Brush Contact

WIP: Road Builder


Chassis: Driver Models – Precise & Repeatable

• Steer a vehicle to follow a path

• Accelerate/Brake to match speed

• Shift gears

• Switch controller action mid-

simulation

• Follow script like an actual driver


Comprehensive Bushing Solution – Altair Bushing

The Universal Bushing Model. Co-developed with BMW & Honda

F

Rubber Damping

Hydromount Damping

Spline

Stiffness

Cubic

Stiffness

Constant

Stiffness

Constant

Damping


Powertrain For Full Vehicle Simulation

Vehicle Model

SteeringBrake

Throttle

Gear

Clutch

Driver Gear BoxPower Train

Clutch

Torque

Trans

Speed

Torque at

Differential

Differential

Rotation speed




• Body Solutions

• Components

• Conclusion


Body: Closures

Model:

Build model in MotionView

Transfer components from HyperMesh

Solve:

Full non-linear time domain solution

30X faster compared to competition (FE Explicit)

Evaluate:

Examine stress history, identify hot spots

Compute fatigue life

Improve:

Unique Multi-body system level optimization using

Equivalent Static Load Method in OptiStruct.


Toyota, GM, Ford India, JLR, Volvo India, Mahindra, EMBD Italy, Daewoo

Bus Corp, Amsted Maxion, etc…

Simulations on your laptop!

No HPC required.


Body: Seating Systems

Model:

Build model in MotionView. Include Higher pair

constraints such as Point-to-Deformable Curve,

Point-to-Curve,…

Solve:


Kinematic or dynamic

Evaluate:

Automated repositioning of seats

Improve:

Unique Multi-body system level optimization using

Equivalent Static Load Method in OptiStruct.

HyperStudy for system level DOE & Optimization

Jamco, B/E Aerospace, JCI, CRH




• Body Solutions

• Components

• Conclusion


Components: Brake Noise

Model:

All components deformable

Friction and stiction at contacts

Solve:


Evaluate:

Examine brake moan, groan and low frequency squeal effects

10 100 500 1k 3-4k 10k

forc

ed

se

lf-e

xc

ite

d

Frequency [Hz]

Low frequency Effects

High

frequency

Effects

SquealSqueal

Judder

Moan

Groan

……


Agenda

• Currently available Altair tools

• Case Studies

• Conclusion


Conclusion

• MotionSolve has a well developed automotive solution

• Many large automotive OEMs successfully use MotionSolve today

• AltairPD will help you with customizing and deploying solutions

• Altair has an aggressive plan for continuing to improve its MBD

capabilities

The Best Technology

+

The Best User Experience

MotionSolve =

altair hpc & cloud offerings: a key enabler for multi-physics - americas atc 2015 workshop

Documents

chassis models

altair engineering

isolate chassis

auto chassis

vehicle chassis bump

suspension components

body components

suspension design model