Added Mass
The Added Mass node is available on boundaries and edges and can be used to supply inertia that is not part of the material itself. Such inertia does not need to be isotropic, in the sense that the inertial effects are not the same in all directions.
Coordinate System Selection
Specify the coordinate system to use for specifying the mass distribution in case of a nonisotropic mass contribution. The coordinate system selection is based on the geometric entity level.
Domains (Plate interface)
From the Coordinate system list select from:
Boundaries (Shell and Plate interfaces)
From the Coordinate system list select from:
Boundary System (a predefined normal-tangential coordinate system)
Edges (Shell interface)
From the Coordinate system list select from:
Global coordinate system (the standard global coordinate system).
Local edge system (the default)
Face Defining the Local Orientations
This setting is used in conjunction with a Local edge system and Shell Local System. If the mass is prescribed for an edge which is shared between boundaries, the edge system can be ambiguous. Select the boundary which should define the edge system. The default is Use face with lowest number.
All other settings for the Added Mass node are described in the documentation for Added Mass in the Solid Mechanics interface.
Location in User Interface
Context Menus
Shell>Mass, Spring, and Damper>Added Mass (Boundary, Edge)
Plate>Mass, Spring, and Damper>Added Mass (Domain, Boundary)
Ribbon
Physics tab with Shell selected:
Boundaries>Mass, Spring, and Damper>Added Mass
Edges>Mass, Spring, and Damper>Added Mass
Physics tab with Plate selected:
Domains>Mass, Spring, and Damper>Added Mass
Boundaries>Mass, Spring, and Damper>Added Mass