IVRESS/GroundVehicle

IVRESS/GroundVehicle is a time-accurate finite element / multibody dynamics tool for predicting the dynamic response of wheeled and tracked ground vehicles. IVRESS/GroundVehicle allows vehicle engineers to quickly build, analyze, and visualize ground vehicles operating on on-road and off-road terrains in an intuitive object-oriented graphical design environment. Typical vehicles that can be modeled include: passenger cars, SUVs, trucks, buses, semi-trailer trucks, and tanks. Simulations can be performed on:

Hard polygonal or Cartesian grid terrains.
Deformable soft-soil Cartesian grid terrains.
Deformable soft-soil DEM (Discrete Element Model) terrains.

IVRESS/GroundVehicle Features

Template/spreadsheet (Excel) user-friendly interface.
Suspension systems models:
- Double wishbone suspension.
- McPherson strut suspension.
- Leaf-spring suspension.
- Multi-link suspension.
- Trailing arm suspension.
- Torsion arm suspension.
Steering system models include:
- Pitman arm.
- Rack and pinion.
- Skid steer.
Drive train models include:
- Front wheel drive, Rear wheel drive, 4x4, 8x8.

Running gear models include:
- Finite element pneumatic tire.
- Lumped Pacejka pneumatic tire.
- Double or single pin segmented track.
- Belt track.

Other vehicle sub-systems models: engine, brakes, gear box, transfer cases, differential, torque converter, antiroll bar, drive shafts, and axles.
Typical output response quantities
- Position, velocity, acceleration, rotation, angular velocities, and angular accelerations for the vehicle frame or any vehicle body.
- Suspension travel.
- Wheel speed and torque.
- Engine speed, torque, and power.
- Tire deflection.
- Running gear (tire or track) contact forces, torque, and slip.
- Drawbar-pull.
Supported terrain types:
- Hard polygonal or Cartesian grid terrains.
- Deformable soft-soil Cartesian grid terrains.
- Deformable soft-soil DEM (Discrete Element Model) terrains.
Typical simulations:
- Steady state operation at any speed or a range of speeds.
- Maximum speed / acceleration on long/side slopes.
- Stability on slopes.
- Drawbar-pull.
- Wall-to-wall turn.
- Cornering.
- Lane change / obstacle avoidance.
- Going over obstacles such as half-rounds.
- Going over rough RMS courses: absorbed vibration power, NVH, suspension vibrations, track vibrations, components fatigue, etc.
- Braking.
- Liquid sloshing.