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Multibody Modeling
MotionView is a general pre-processor for Multibody Dynamics.
Vehicle Modeling
Explore the various vehicle modeling tools.
Leaf Spring Modeling
Leaf Spring Builder
The Leaf Spring Builder is used to model leaf springs, using rigid bodies, beams, and contact forces. It can information about the number of leaves, the leaf shapes, cross-sections, material properties, contact properties, shackle length (if your spring employs a shackle), nominal axle load and other information, to create an MDL system definition, which can be imported into a suspension or full vehicle model.
Axle
The Axle component is required to define the options in the Axle Properties section.

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View new features for Altair HyperWorks 2024.1.
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Solver interfaces supported in HyperMesh.
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A solver interface is made up of a template and a FE-input reader.
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Create and edit 2D parametric sketch geometry.
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HyperMesh composites modeling.
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Create connections between parts of your model.
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Rapidly change the shape of the FE mesh without severely sacrificing the mesh quality.
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Create a reduced ordered model to facilitate optimization at the concept phase.
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Setup an Optimization in HyperMesh.
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Validate the model built before running solver analysis.
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Models require loads and boundary conditions in order to represent the various physics and/or physical equivalents to bench and in-use testing.
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Reduce a full 3D model with axisymmetric surfaces while accounting for imperfections.
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Tools and workflows that are dedicated to rapidly creating new parts for specific use cases, or amending existing parts. The current capabilities are focused on stiffening parts.
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Tools used for crash and safety analysis.
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Use airbag folder utilities and export a resulting airbag in a Radioss deck.
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Essential utility tools developed using HyperMesh-Tcl.
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Import an aeroelastic finite element model with Nastran Bulk Data format.
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Framework to plug certification methods to assess margin of safety from the model and result information.
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Use PhysicsAI to build fast predictive models from CAE data. PhysicsAI can be trained on data with any physics or remeshing and without design variables.
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Results data can be post-processed using both HyperMesh and HyperView.
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The Developer ribbon contains tools for automation and customization.
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HyperGraph is a data analysis and plotting tool with interfaces to many file formats.
Multibody Modeling
MotionView is a general pre-processor for Multibody Dynamics.
- MotionView Overview
  MotionView is a general pre-processor for Multibody Dynamics.
- Model Browser
  The Model Browser allows you to view the MotionView model structure while providing display and editing control of entities.
- MotionView Ribbons
  The MotionView ribbons allows you to quickly access tools and standard functions, and is located along the top of 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 multibody dynamics models.
- Functional Mockup Unit (FMU)
  Add an FMU to the model or export a model as an FMU.
- Vehicle Modeling
  Explore the various vehicle modeling tools.
  - Build and Analyze Models
  - Vehicle Libraries
  - Components Library
  - Leaf Spring Modeling
    - Leaf Spring Builder
      The Leaf Spring Builder is used to model leaf springs, using rigid bodies, beams, and contact forces. It can information about the number of leaves, the leaf shapes, cross-sections, material properties, contact properties, shackle length (if your spring employs a shackle), nominal axle load and other information, to create an MDL system definition, which can be imported into a suspension or full vehicle model.
      - General
        The General option in the tree browser provides basic details and displays the entire model in the Help section. It is necessary for all the property files.
      - Leaves
        The Leaves component allows you to add a stack of leaves, with each subsequent leaf shorter than the previous one.
      - Leaf Ends
        The Leaf Ends component provides details about the leaf end types at the front and rear ends. Currently, two types of leaf ends are supported. Other possible options will be slider end.
      - Clips
        The Clips component is used to define the clip properties.
      - Axle
        The Axle component is required to define the options in the Axle Properties section.
      - Materials
        Material properties are used for the beam elements in constructing the leaves.
      - Bushings
        Bushings are typically used to reduce vibration and noise, absorb shock, and accommodate misalignments.
      - Contacts
        The Contacts component is required to define the options in the Contact Properties section for inter-leaf contacts.
      - Shackle
        The Shackle component is used to define the orientation of the shackle with respect to the leaf eye on to which it is going to get mounted. It is only required if either of the eye hooks are not “Slider”.
      - Clip Details
        In the Clip details component, you can enter the required number of clips that have to be included in the Total number of Clips text field.
      - Build
        The Build component is the final step to build a leaf spring model in MotionView. The Leaf Spring Builder saves the data you have entered to build a model and it can be imported in a leaf spring property file format.
      - Test
        The Test component is required to define the options in the Test Properties section.
      - Assembled and Loaded Leaf Spring
        An assembled and loaded Leaf Spring is used to model the leaf spring with information that one can easily retrieve. Generally, one can see the leaf spring assembled in trucks and also know the axle load on the leaf spring.
  - Road Modeling
  - Tire Modeling
  - Soft Soil Modeling
  - Full Vehicle Events and Altair Driver
  - Road Tools
  - 1D Vehicle System Models
  - Update Model Tool
  - Aerodynamics
  - Track Builder
- Tcl/Tk Reference Guide
  Reference material for the 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
  Reference materials for the MotionView Python Language.
Media Files
MediaView plays video files, displays static images, tracks objects, and measures distances.
Tabulate Results
Use TableView to create an Excel-like spreadsheet.
Text Files
TextView math scripts reference vector data from HyperGraph windows to automate data processing and data summary.
Publishing and Reporting
Create, define, and export reports.

View All Altair HyperWorks Help

Axle

The Axle component is required to define the options in the Axle Properties section.

Axle Properties

Figure 1. Axle Component - Axle Properties

Type

Defines the type of axle orientation.

UnderSlung:
Figure 2.
OverSlung:
Figure 3.

Front Inactive Length

Defines the estimated inactive length on the front half of the spring.

Rear Inactive Length

Defines the estimated inactive length of the rear half of the spring.

Leaf Pack Thickness

Defines the pack thickness at the center of the leaf spring. This is now redundant and you do not have to enter it anymore.

Load on Leaf Pack

Provides the force that has to be applied to the leaf system for design-loading.

Angle with x-axis

Angle of the leaf pack with x-axis that is positive in the counter clockwise direction and negative in the clockwise direction.

Leaf Reference Location

Specify the bolt center location of the top or bottom leaf in the leaf pack depending upon the axle type of the system.

If the system is ‘Underslung’, then it will be a bolt center location of the top most leaf.
If the system is ‘Overslung’, then it will be a bolt center location of the bottom most leaf.

This is optional, however it is advisable to mention it for accurate referencing of the leaf spring system.

An example of how a Leaf Reference Marker block is represented in a TiemOrbit file format is shown below:

$------------------------------LEAF_REF_MARKER
[LEAF_REF_LOC]
X = 0
Y = 0
Z = -11.25

Axle Details for Leaf Property File (*lpf)

In the Axle Details block of leaf property file, the attribute, type, and valid value to be entered in TiemOrbit file format are detailed in the following table. This table also provides information about the mandatory requirements for attributes.

An example of how an Axle Details block is represented in a TiemOrbit file format is shown below:

$-------------------------------------AXLE_DETAILS
[AXLE_DETAILS]
AXLETYPE = ‘OVERSLUNG’
FRONTINACTIVELENGTH = 60
REARINACTIVELENGTH = 60
LEAFPACKTHICKNESS = 30
LOAD = 0

Block Name = ‘AXLE_DETAILS’ (Required)


Attributes	Type	Valid Value	Required
axleType	String	‘UNDERSLUNG’, ‘OVERSLUNG’	Yes
frontInactiveLength	Real	-	Yes
rearInactiveLength	Real	-	Yes
leafRotAngle	Real	Angle of the leaf with x-axis that is +ve in counter clockwise direction and vice versa.	Yes
leafPackThickness	Real	-	Optional
Load	Real	-	Optional