Plate Attributes: Non-structural Mass

Description

Assigns non-structural mass to selected plate elements using a scalar mass value, a dynamic scaling factor, and an optional offset.

The non-structural mass is applied uniformly to the plate, over the plate's mid-surface area. In axisymmetric models, the non-structural mass is applied per unit of arc length over a segment of one radian.

Non-structural mass attributes are load case dependent.

Dialog

Mass

Scalar value of mass per area.

Dyn Factor

Scales the mass value for dynamic analysis and, optionally, for linear seismic load cases.

ID

Unique ID assigned to the attribute.

By using different IDs, multiple non-structural mass attributes can be defined at the same plate for the same load case.

IDs must be positive integers between 1 and 192.

Offset X / Y / Z

Three components that define the magnitude and direction of the offset of the mass from the plate.

Coordinate System

The coordinate system (UCS) in which the offset components are defined.

The UCS is used only to define the global Cartesian components of the offset. Subsequent changes to the UCS do not affect the offset location.

Common Controls

• Components
• Equation Editor
• Retrieve from model
• Keep selection
• Scale / Add / Delete / Apply

Units

Mass/Area (e.g., kg/m², tonne/m², lb/in²).

See Also

• Special Topics: Non-structural Mass
• Special Topics: Equivalent Static Seismic Analysis