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Multi-Body Simulation - Americas ATC 2015 Workshop

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This Workshop Presentation on Multi-Body Dynamics was conducted by Keshav Sundaresh at the Americas ATC on May 5, 2015. <br><br>In this workshop, learn how MotionSolve is used to design and evaluate new suspension systems, optimize the ride and handling characteristics of vehicles, assess system durability, simulate for low frequency vibration avoidance, design and optimize steering systems, and validate Mechatronics components

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Multi-Body Simulation - Americas ATC 2015 Workshop

  1. 1. Innovation Intelligence® Multi-body Simulation Workshop Cinco de Mayo, 2015 Keshav Sundaresh
  2. 2. 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
  3. 3. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 3 MotionSolve In the Automotive Industry • Chassis Solutions • Body Solutions • Components • Conclusion
  4. 4. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 4 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
  5. 5. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 5 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
  6. 6. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 6 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
  7. 7. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 7 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
  8. 8. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 8 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: HyperStudy for system DOE & Optimization ESLM for component optimization Toyota, Honda, Hyundai, MAN, FDTE, DANA, TATA Daewoo, Ducati, Piaggio, Mahindra, Bajaj
  9. 9. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 9 Chassis: Road Models Supported In MotionSolve Road Type Supplier Works with: 2D Flat, Sinusoidal, etc., COSIN HTire & FTire 3D - RGR Rectangular Grid COSIN FTire 3D-RSM Road Surface Model Fraunhofer CDTire 3D - CRG Curved Regular Grid Opencrg.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
  10. 10. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 10 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
  11. 11. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 11 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
  12. 12. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 12 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
  13. 13. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 13 MotionSolve In the Automotive Industry • Chassis Solutions • Body Solutions • Components • Conclusion
  14. 14. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 14 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. HyperStudy for system DOE & Optimization Toyota, GM, Ford India, JLR, Volvo India, Mahindra, EMBD Italy, Daewoo Bus Corp, Amsted Maxion, etc… Simulations on your laptop! No HPC required.
  15. 15. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 15 Body: Seating Systems Model: Build model in MotionView. Include Higher pair constraints such as Point-to-Deformable Curve, Point-to-Curve,… Solve: Full non-linear time domain solution 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
  16. 16. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 16 MotionSolve In the Automotive Industry • Chassis Solutions • Body Solutions • Components • Conclusion
  17. 17. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 17 Components: Brake Noise Model: All components deformable Friction and stiction at contacts Solve: Full non-linear time domain solution Evaluate: Examine brake moan, groan and low frequency squeal effects 10 100 500 1k 3-4k 10k forcedself-excited Frequency [Hz] Low frequency Effects High frequency Effects Squeal Squeal Judder Moan Groan … …
  18. 18. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 18 Agenda • Currently available Altair tools • Case Studies • Conclusion
  19. 19. Copyright © 2015 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 19 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 =

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