Use the Airbag subpanel to create the control volumes/airbags using a set of components, elements, or contact surfs.

Panel Inputs

Use the Reference Geometry subpanel to define a reference geometry for the nodes of an airbag.

Each reference geometry holds the IDs of the nodes selected as well as their original nodal location.  After you create the reference geometry, you can manipulate the original mesh (that is rotate, deform, scale or translate the mesh to simulate airbag folding or other conditions).  When you review reference geometry, it displays the original nodal locations at the time the reference geometry was created. (In this way, the reference geometry definition can be used to preserve IMM information for solvers that have these features implemented.)  If you delete a node or element that is a member of a control volume, it also deletes the control volume definition.

Some typical applications for a control volume include:

Panel Inputs