MotionView User's Guide

2020.1

Home
Vehicle Modeling
Explore the various vehicle modeling tools.
Components Library
Bushings
Use the Altair Bushing Model with MotionView
This section provides information about using the Altair Bushing Model, also known as AutoBushFD, with MotionView. The Altair Bushing Model is a sophisticated model that you can use to simulate the behavior of bushings in vehicle dynamics, durability and NVH simulations.
Define the Bushing's Properties
The Properties window includes five tabs that you can use to define the properties of your bushing.

What's New
Get Started
Tutorials
MotionView Overview
MotionView Menus
Project Browser
MotionView Panels
MotionView CAD Interfacing
Flexible Bodies
MotionView Solver Interfacing
Vehicle Modeling
Optimization
Functional Mockup Unit (FMU)
MotionView Interface with Collaboration Tools
Tcl/Tk Reference Guide
MDL Reference Guide
MotionSolve Reference Guide
Templex and Math Reference Guide
MotionView Python Reference Guide (Beta)

2020.1

MotionView User's Guide

What's New
View new features for MotionView 2020.1.
Get Started
Learn the basics and discover the workspace.
Tutorials
Discover MotionView functionality with interactive tutorials.
MotionView Overview
MotionView is a general pre-processor for Multi-body Dynamics.
MotionView Menus
Explore the MotionView menus which provide access to the various wizards, dialogs, tools, and panels.
Project Browser
The Project Browser allows you to view the MotionView model structure while providing display and editing control of entities.
MotionView Panels
Explore the various panels and tools in MotionView.
MotionView CAD Interfacing
MotionView supports the importing of several types of CAD and FE formats.
Flexible Bodies
MotionView has many pre-processing and post-processing capabilities with regards to flexible bodies, or flexbodies, for multi-body dynamics models.
MotionView Solver Interfacing
Solvers and translators supported in MotionView.
Vehicle Modeling
Explore the various vehicle modeling tools.
- Build and Analyze Models
- Vehicle Libraries
- Components Library
  - Accessing Auto Entities in MotionView
  - Symmetry Options
  - Bump and Rebound Stops
  - Bushings
    - AutoBush
      The AutoBush is a bushing model that is designed to easily simulate bushings used in ground vehicles. The AutoBush entity reads bushing stiffness (force-displacement) and damping (force-velocity) data from a file written in the TeimOrbit format.
    - AutoBush FD
    - Use the Altair Bushing Model with MotionView
      This section provides information about using the Altair Bushing Model, also known as AutoBushFD, with MotionView. The Altair Bushing Model is a sophisticated model that you can use to simulate the behavior of bushings in vehicle dynamics, durability and NVH simulations.
      - General Bushing System Files
        The Model Identification Tool (MotionView) is a utility in HyperGraph that you use to fit experimental data to various bushing models. The MotionView generates a General Bushing System file, .gbs file, which defines the bushing properties.
      - Add an Altair Bushing Model
        You can add an Altair Bushing Model, also known as AutoBushFD, a frequency-dependent bushing, to your MotionView model using the Add Auto Entity tool in MotionView.
      - Attach a Bushing to the Model
        This section describes how you attach a bushing to a model.
      - Define the Bushing's Properties
        The Properties window includes five tabs that you can use to define the properties of your bushing.
        
        Define the Property File
        
        Define Preload, Offset and Scale
        
        Define the Friction
        The friction torque resists rotation of the bodies relative to one another. The friction model supports stiction and sliding effects as well as a measured friction torque due to preload in the bushing.
        
        Define the Mount Stiffness
        Use Mount Stiffness when you want to approximate the structural deflection of the bodies that the bushing connects due to the load that the bushing carries. Mount stiffness is modeled as a set of linear springs and dampers in series with the bushing stiffness and damping, thus softening the connection between the bodies. Alternatively, you can use flexible bodies to model the bodies the bushing connects.
        
        Define the Mount Limits
        You can activate Mount Limits to simulate material contact between the bodies that the bushing connects. This contact limits the bushing deflection. When the deflection is sufficient in a given direction to close the gap distance, the mount limit forces or torques become active. The forces and torque are computed using an impact function. An exponent greater than one (1) provides increasing stiffness with penetration. The damping force is smoothed with a cubic step function over the penetration distance.
      - Add a Pair of Bushings
        In addition to adding a single bushing to your project, you can also add a pair of bushings such as AutoBushFD pair. When you add a pair, MotionView automatically reflects modifications you make on the left bushing of the pair to the right bushing, unless you choose otherwise. MotionView assumes bilateral symmetry about the global X-Z plane.
  - Dampers
  - Springs
  - Tires
  - Plotting Auto Entities in HyperGraph
  - TeimOrbit File Format
  - Test Rig
- Leaf Spring Modeling
- Road Modeling
- Tire Modeling
- Full Vehicle Events and Altair Driver
- Road Tools
- 1D Vehicle System Models
- Update Model Utility
Optimization
Discover optimization with MotionView, MotionSolve, and HyperStudy.
Functional Mockup Unit (FMU)
Learn more about the Functional Mockup Unit (FMU) in MotionView and MotionSolve.
MotionView Interface with Collaboration Tools
MotionView supports a limited version of interface with HyperWorks Collaboration Tools.
Tcl/Tk Reference Guide
Reference material for the HyperWorks Desktop scripting interface which is a set of Tcl/Tk commands.
MDL Reference Guide
Reference materials for the MotionView MDL Language, Tire Modeling, and the MDL Library.
MotionSolve Reference Guide
Reference material detailing command statements, model statements, functions and the Subroutine Interface available in MotionSolve.
Templex and Math Reference Guide
Reference material for Templex (a general purpose text and numeric processor) and additional mathematical functions and operators.
MotionView Python Reference Guide (Beta)
Reference materials for the MotionView Python Language.

View All Altair HyperWorks Help

MotionView User's Guide

2020.1

Home
Vehicle Modeling
Explore the various vehicle modeling tools.
Components Library
Bushings
Use the Altair Bushing Model with MotionView
This section provides information about using the Altair Bushing Model, also known as AutoBushFD, with MotionView. The Altair Bushing Model is a sophisticated model that you can use to simulate the behavior of bushings in vehicle dynamics, durability and NVH simulations.
Define the Bushing's Properties
The Properties window includes five tabs that you can use to define the properties of your bushing.

What's New
Get Started
Tutorials
MotionView Overview
MotionView Menus
Project Browser
MotionView Panels
MotionView CAD Interfacing
Flexible Bodies
MotionView Solver Interfacing
Vehicle Modeling
Optimization
Functional Mockup Unit (FMU)
MotionView Interface with Collaboration Tools
Tcl/Tk Reference Guide
MDL Reference Guide
MotionSolve Reference Guide
Templex and Math Reference Guide
MotionView Python Reference Guide (Beta)

Define the Bushing's Properties

The Properties window includes five tabs that you can use to define the properties of your bushing.

Define the Property File
Define Preload, Offset and Scale
Define the Friction
The friction torque resists rotation of the bodies relative to one another. The friction model supports stiction and sliding effects as well as a measured friction torque due to preload in the bushing.
Define the Mount Stiffness
Use Mount Stiffness when you want to approximate the structural deflection of the bodies that the bushing connects due to the load that the bushing carries. Mount stiffness is modeled as a set of linear springs and dampers in series with the bushing stiffness and damping, thus softening the connection between the bodies. Alternatively, you can use flexible bodies to model the bodies the bushing connects.
Define the Mount Limits
You can activate Mount Limits to simulate material contact between the bodies that the bushing connects. This contact limits the bushing deflection. When the deflection is sufficient in a given direction to close the gap distance, the mount limit forces or torques become active. The forces and torque are computed using an impact function. An exponent greater than one (1) provides increasing stiffness with penetration. The damping force is smoothed with a cubic step function over the penetration distance.

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