If Type is set to Rotational Force, then the dialog will look as shown below.
Rotational forces are inertial forces. They are not applied to geometry. Instead, they act on the mesh mass properties. Mass properties must be defined or the force will not act on the body.
You can define the Rotational Vector (axis of rotation) and Origin of the rotational vector using several methods and based on CAD assembly, CAD part, or user-defined coordinate systems.
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Direction: Select one of the fallowing three options for specifying the Rotational Vector:
- Components: Specify the x, y, and z components of the Rotational Vector in the provided input fields.
- Normal to Surface: This option is not currently supported for defining the Rotational Vector of a Rotational Force load.
- Geometric Entity: Select an edge of your model to define the axis of rotation. The selected edge appears in the box immediately beneath the Direction drop-down menu.
- Coordinate System: This option is applicable to Direction = Components mode only. Choose the desired coordinate system from the drop-down menu. CAD assembly, part, and user-defined coordinate systems are available for selection.
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Origin: Use this drop-down menu to choose one of the following options for defining the rotational vector Origin.
- Vertex/Point: Select a sketch point or CAD model vertex as the rotational vector Origin.
- Node: Select a node (mesh grid point) as the rotational vector Origin.
- Coordinates: Specify the X, Y, and Z coordinates of the rotational vector Origin in the provided input fields
Sometimes, the acceleration velocity axes are not in the same direction. When this is the case, you must define two different rotational force loads (one for acceleration and one for velocity) to accommodate the differing rotational vectors.
When fully defined, the rotational force glyph appears in the lower right corner of the graphics display window.
Display Options (Size, Density, and Color) are not applicable to Rotational force loads.