Engineering Solutions

MBS joints panel

MBS joints panel

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MBS joints panel

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Use the MBS joints panel to define kinematic joints between two local coordinate systems to connect two multibody collectors.  The HyperMesh entity created is an mbjoint.

Notes:

The panel contains an organize systems option.  When activated (default) during joint creation, two coordinate system collectors will be automatically created and the joint local coordinate systems will be placed in their respective collectors.  Since joint local coordinate systems are usually coincident in global space (but not required), the "organize systems" option provides easy access to each joint system.
Care should be taken when creating joints without coincident joint coordinate because the exported model might not reflect the model in Engineering Solutions.
Joint types are defined by assigning a card image in the card image= field (in some user profiles, it is the type= field).  If no card image is assigned, all DOFs are active.
The available joint types are dependent on the template file loaded with the user profile.
When an mbjoint entity is created, a coordinate system hierarchy is created by: 1) Referencing the child multibody collector’s coordinate system to the joint child coordinate system.  2) Referencing the joint child coordinate system to the joint parent coordinate system.  3) Referencing the joint parent coordinate system to the parent multibody collector’s coordinate system.
When an mbjoint entity is deleted in the Delete panel, the joint’s child coordinate system is referenced to the global coordinate system.

 

Subpanels and Inputs


The MBS Joints panel contains the following subpanels and command buttons:

hmtoggle_arrow1Create

Use the Create subpanel to create new MBS joints.

 

Panel Inputs

Input

Action

name =

Type in a name for the new joint.

card image = /

type =

Click the button to display a list of card images, then select one.

Note:In some user profiles this button is replaced by type =.

parent: color

Click this button to open a standard color palette, then pick a color for the parent entity of the joint.

parent: syst

Use this selector to pick the joint parent's coordinate system.

parent: multibody / reference space

Set this toggle to reference space if connecting the joint to the reference space, or multibody if connecting the joint to two bodies.

mbjoint: color

Click this button to open a standard color palette, then pick a color for the joint.

child: color

Click this button to open a standard color palette, then pick a color for the child entity of the joint.

child: syst

Use this selector to pick the joint child's coordinate system.

child: multibody

Use this selector to choose the multibody collector that defines the joint’s child body.

organize systs

When activated, the joint coordinate systems are automatically separated into new coordinate system collectors.

 

hmtoggle_arrow1Update

Use the Update subpanel to change the characteristics of an existing MBS joint.

 

Panel Inputs

Input

Action

name =

Click this input to select the desired MBS joint from a list of existing ones.

card image = /

type =

Click the button to display a list of card images, then select one.

Note:In some user profiles this button is replaced by type =.

parent: syst

Use this selector to pick the joint parent's coordinate system.

parent: multibody / reference space

Set this toggle to reference space if connecting the joint to the reference space, or multibody if connecting the joint to two bodies.

mbjoint: color

Click this button to open a standard color palette, then pick a color for the joint.

child: syst

Use this selector to pick the joint child's coordinate system.

child: multibody

Use this selector to choose the multibody collector that defines the joint’s child body.

 

hmtoggle_arrow1Card Image

Use the Card Image subpanel to change the card image (or type, in some user profiles) assigned to an existing MBS joint.

 

Panel Inputs

Input

Action

name =

Click this input to select the desired MBS joint from a list of existing ones.

card image = /

type =

Click the button to display a list of card images, then select one.

Note:In some user profiles this button is replaced by type =.

 

hmtoggle_arrow1Command Buttons

The following action buttons appear throughout the subpanels:

Button

Action

create

Creates the new MBS joint.

create/edit

Creates the new joint and opens its assigned card image in edit mode.

update

Changes the selected joints to use the current input settings.

edit

Edits the current MBS joint's card image.

load

Loads the selected MBS Joint's card image.

load/edit

Loads the selected MBS Joint's card image and displays it in edit mode.

reject

Undoes the most recent joint creation or update.

reset

Resets the joint's input settings to their original values.

reset all

Resets all MBS joints in the model their original values.

return

Exits the panel.

 

See Also:

Alphabetical List of Panels