MotionView User's Guide

2020.1

Home
MotionView Panels
Explore the various panels and tools in MotionView.
Advanced Joints
Use the Advanced Joints tool to create and edit a set of special constraints called higher pair joints. Typically, these are constraints that involve a curve or surface on at least one of the two bodies.
Edit Advanced Joints

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)

Index

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 Toolbars
  The MotionView toolbars provide you with quick access to some of the most commonly used panels and tools.
- Entity Selector
  The Entity Selector allows you to set the graphic screen selection mode.
- Graphic Entity Attributes
  Model files are composed of many different parts, or entities. MotionView allows you to change the display attributes of each entity in a graphic. Visual properties such as shading, color, and mesh lines can be assigned using the Graphic Entity Attributes panel.
- Run Solver
  The Run Solver tool allows you to either run the current model or run an existing solver command file generated previously by MotionView.
- System/Assemby
  The System/Assembly panel allows you to add new systems and assemblies to your model, modify attachments, and set initial conditions and options for systems and assemblies.
- Analysis
  The Analysis panel allows you to add new analyses to your model, modify attachments, set initial conditions for analyses, and set analyses options.
- Command Sets
  The Command Sets panel allows you to create command sets for the solver-command file. The command sets for a model are order dependent, since they define the contents of the solver command file.
- Points
  The Points tool allows you to add points to models and edit point coordinates.
- Vectors
  Use the Vectors tool to create and edit vectors.
- Markers
  Use the Markers tool to create coordinate systems and reference frames.
- Methods of Orientation
  Coordinate systems in MotionView can be oriented using a variety of methods.
- Curves
  Use the Curves tool to create and edit curves.
- Deformable Curves
  Use the Deformable Curves tool to create and edit deformable curves.
- Spline3D
  The Spline3D panel allows you to add and edit three dimensional spline data.
- Surfaces
  The Surfaces tool allows you to create surfaces for use with advanced joint entities.
- Deformable Surfaces
  Use the Deformable Surfaces tool to create and edit deformable surfaces. These entities can change shape during the simulation and can be used with advanced joints and contacts.
- Graphics
  Use the Graphics tool to create and edit visualizations for entities during pre-processing and post-processing.
- Bodies
  Use the Bodies tool to create and edit rigid, point mass, and deformable/flexible bodies.
- Joints
  Use the Joints tool to create and edit basic joints.
- Advanced Joints
  Use the Advanced Joints tool to create and edit a set of special constraints called higher pair joints. Typically, these are constraints that involve a curve or surface on at least one of the two bodies.
  - Create Advanced Joints
  - Edit Advanced Joints
    - Point to Curve (PTCV)
      A point to curve joint consists of a fixed point on one body sliding on a curve that is fixed on a second body. The point is not allowed to lift off the curve. The curve on the second body should be a 3D curve and needs to be specified using a MotionView curve (which is a reference entity).
    - Curve to Curve (CVCV)
      The curve to curve constraint consists of a 3D curve fixed on one body rolling and sliding on a 3D curve fixed on a second body. The curves are required to have a unique point of contact and a common tangent at that point of contact. The curve-to-curve constraint is useful for modeling cams where the point of contact between two parts changes during the motion of the system. The curves always maintain contact, however, even when the physics of the model might dictate that one curve lift off the other.
    - Point to Surface (PTSF)
      A point to surface joint constrains a fixed point on a body to slide along a surface. The point to surface joint provides five degrees of freedom: three rotational at the instantaneous point of contact and two translational DOF.
    - Curve to Surface (CVSF)
      The curve to surface joint provides five degrees of freedom: three rotational at the instantaneous point of contact and two translational DOF.
    - Surface to Surface (SFSF)
      The surface to surface constraint consists of a surface on one body rolling and sliding on the surface of a second body. Each of the surfaces are required to have a unique contact point. The surface to surface joint constrains the two surfaces as follows: the surfaces have exactly one contact point, and the normal at the contact point for each is anti-parallel.
    - Point to Deformable Curve (PTDCV)
      The point to deformable curve joint constrains a fixed point on a body to slide along a curve that passes through the origins of a specified set of markers. These markers may belong to different bodies. As the markers move in space, the curve is calculated at every time step using CUBIC spline interpolation through the marker origins. Hence, the curve deforms as the markers move about.
    - Point to Deformable Surface (PTDSF)
      The point to deformable surface joint constrains a fixed point on a body to slide along a surface that passes through the origins of a specified set of markers. These markers may belong to different bodies. As the markers move in space, the surface is calculated at every time step using CUBIC spline interpolation through the marker origins. Hence, the surface deforms as the markers move about.
    - Constraint Mates
      Constraint mates offer higher pair constraints in the form of distance, coincidence and tangency between two analytical geometries. The geometries could be point, line, sphere, cylinder, cone or a plane. The geometry is defined analytically using bodies and points.
- Couplers
  A Coupler entity defines an algebraic relationship between the degrees of freedom of two or three joints.
- Gears
  Use the Gears tool to create a gear entity to relate the motion of two joints.
- Bushings
  Use the Bushings tool to create bushings and edit their connectivity, properties, and orientation rules.
- General Constraints
  Use the General Constraints tool to create a generic expression based constraint.
- Fields
  Use the Fields tool to create a compliant connection between two bodies where stiffness or damping in one direction can be a function of displacement in another direction
- Spring Dampers
  Use the Spring Dampers tool to edit the connectivity, properties, and initial conditions of springs and dampers.
- Beams
  Use the Beams to create beams and edit their connectivity, properties, and orientations.
- Polybeams
  Use the PolyBeams tool to create polybeams and edit their points and properties.
- Motions
  Use the Motions tool to create motions and to edit the initial conditions, displacements, velocities, and acceleration of joints.
- Forces
  Use the Forces tool to create forces and to edit the orientation and properties of forces.
- Modal Forces
  The Modal Forces tool allows you to include a disturbed force on a flexible body that exists in the modal form in the flexible body H3D.
- Contacts
  Use the Contacts tool to specify the attributes of a contact force between two bodies.
- Outputs
  Use the Outputs tool to create a result output request to the solver, which writes out the requested data for plotting data.
- Sensors
  Use the Sensors tool to sense an event during simulation and to define a response to that event
- Control State Equations
  Use the State Equations tool to create and set control state equation data.
- FMU
  Use the FMU tool to add a Functional Mock-up Unit and connect it to a multi-body model.
- Templates
  Use the Templates tool to create and edit blocks of text that contain data fields and programming instructions.
- Forms
  Use the Forms tool to edit general data entry forms.
- Datasets
  Use the DataSets tool to create and edit datasets comprised of object types, such as real, string, boolean, integer, and options.
- Solver Variables
  Use the Variables tool to create solver variables that can be used to create an algebraic expression of state variables, as well as other solver variables. This can then be referenced in function expressions throughout the solver input file.
- Solver Arrays
  Use the Arrays tool to create solver arrays and set solver array data. Solver array types include X array, Y array, U array, IC array, Plant Input array, and Plant Output array.
- Solver Strings
  Use the Strings tool to create a solver string and set solver string data. A solver string provides a string that can be accessed within the model, for example, to pass into a user subroutine.
- Control SISOs
  Use the SISOs tool to set control SISO data. This data can be used to add additional states to the mechanical system being modeled.
- Solver Differential Equations
  Use the Diff Equations tool to set solver differential equations. These equations can be used to add additional states to the mechanical system being modeled.
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.
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
MotionView Panels
Explore the various panels and tools in MotionView.
Advanced Joints
Use the Advanced Joints tool to create and edit a set of special constraints called higher pair joints. Typically, these are constraints that involve a curve or surface on at least one of the two bodies.
Edit Advanced Joints

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)

Index

Edit Advanced Joints

Point to Curve (PTCV)
A point to curve joint consists of a fixed point on one body sliding on a curve that is fixed on a second body. The point is not allowed to lift off the curve. The curve on the second body should be a 3D curve and needs to be specified using a MotionView curve (which is a reference entity).
Curve to Curve (CVCV)
The curve to curve constraint consists of a 3D curve fixed on one body rolling and sliding on a 3D curve fixed on a second body. The curves are required to have a unique point of contact and a common tangent at that point of contact. The curve-to-curve constraint is useful for modeling cams where the point of contact between two parts changes during the motion of the system. The curves always maintain contact, however, even when the physics of the model might dictate that one curve lift off the other.
Point to Surface (PTSF)
A point to surface joint constrains a fixed point on a body to slide along a surface. The point to surface joint provides five degrees of freedom: three rotational at the instantaneous point of contact and two translational DOF.
Curve to Surface (CVSF)
The curve to surface joint provides five degrees of freedom: three rotational at the instantaneous point of contact and two translational DOF.
Surface to Surface (SFSF)
The surface to surface constraint consists of a surface on one body rolling and sliding on the surface of a second body. Each of the surfaces are required to have a unique contact point. The surface to surface joint constrains the two surfaces as follows: the surfaces have exactly one contact point, and the normal at the contact point for each is anti-parallel.
Point to Deformable Curve (PTDCV)
The point to deformable curve joint constrains a fixed point on a body to slide along a curve that passes through the origins of a specified set of markers. These markers may belong to different bodies. As the markers move in space, the curve is calculated at every time step using CUBIC spline interpolation through the marker origins. Hence, the curve deforms as the markers move about.
Point to Deformable Surface (PTDSF)
The point to deformable surface joint constrains a fixed point on a body to slide along a surface that passes through the origins of a specified set of markers. These markers may belong to different bodies. As the markers move in space, the surface is calculated at every time step using CUBIC spline interpolation through the marker origins. Hence, the surface deforms as the markers move about.
Constraint Mates
Constraint mates offer higher pair constraints in the form of distance, coincidence and tangency between two analytical geometries. The geometries could be point, line, sphere, cylinder, cone or a plane. The geometry is defined analytically using bodies and points.

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