Engineering Technology Associates, Inc.

VPG's Structure module allows the user to  define LS-DYNA models which can be used for mechanical system analysis including tire model, suspension model and road surfaces.  eta/VPG uses an analysis approach consistent with test environments dynamic non-linear analysis using real-time boundary conditions.

Road Surface Models

• Digitized from MGA proving ground roads
• Any 3-D data can be used to generate road surfaces
  

Tire Models

• 3-D FEA models including the tire air pressure
• Frictional Contact interface with road
• Validated versus test data
  

Vehicle Dynamics

• Road Load Generation
• Use of simplified models for event-based loads
• Rigid and flexible members
• Component or sub-system studies
  

Full System & Component Durability / Fatigue Assessment

• Time-domain transient stress and strain prediction
• eta/VPG fatigue analysis tool included
• Allows multiple material assignment
• Provides a way to create user defined materials
• Users can output files useful in other fatigue codes
• Simulation of durability critical proving ground events
• Calculate material damage of each event
• Calculate the “occurrence” cycles
• Accumulate damages per cycle to predict fatigue life.
  

Noise, Vibration & Harshness

• Simulate dynamic rough road events including cobbles, potholes and ditches
• Simulate vehicle limit handling events including rollover and emergency lane changes