Added Mass

The node is available for boundaries, edges, and points 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. The extra inertia is as a volumetric, boundary, or edge contribution to the selected material layers.

You can also add inertia to the interfaces between the material layers by using Added Mass, Interface.

Shell Properties

Select the material layers to which this added mass contribution is to be applied.

Table 6-52: Layer Selections; Added Mass
Selection	Use All Layers	Selection of Individual Layers
Boundary, Edge, Point	Same as interface selection when the node is added.	When Use all layers is not selected. Only a subset of the layers selected in the physics interface can be selected.

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All other settings for the node are described in the documentation for Added Mass in the Solid Mechanics interface.

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For a general description of layer and interface selections, see The Shell Properties and Interface Selection Sections.

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You can describe added mass densities with a through-thickness variation by explicitly or implicitly using expressions containing the extra dimension coordinate as described in Using the Extra Dimension Coordinates.

Location in User Interface

Context Menus

Ribbon

Physics tab with selected: