19.16.1. Define Primary Criterion for the Measures Object

To specify a Primary Criterion object under the Measures object:

  1. To apply criteria to the mesh, first insert a Measures object from the Model Context tab or right-click the Model object and select Insert > Measures.

    Once the Measures object is inserted, the Primary Criterion/Composite Criterion options are available from the Measures Context tab, or by right-clicking the Measures object and selecting Insert > Primary Criterion or Composite Criterion.

  2. Select the desired Scoping Method. Options include:

    • Geometry (default): Displays an associated Geometry selection property you use to select a geometric entity using the Vertex, Edge, Face, or Body selection options.

    • Named Selection: Displays an associated Named Selection property you use to select an available user–defined Named Selection.

  3. From the Base Result property, select the type of nodal vector field from which the extraction occurs. Property options for this analysis type include:

    • Mass

    • Volume

    • Center of Gravity

    • Moment of Inertia

  4. As needed, change the Coordinate System. This property provides a drop-down list of available coordinate systems. The selected coordinate system must be Cartesian. The default setting is Global Coordinate System.

    Note:  When the Base Result property is set to Moment of Inertia, this property also includes and is automatically set to the option Coordinate System At Center Of Gravity. Using this option means that the Moment of Inertia is computed with respect to the center of gravity of the scoped geometry.

  5. Specify the component of interest using the Reduction property. Options include:

    • X, Y or Z: These options are available when the Base Result property is set to Center of Gravity.

    • Ixx, Iyy, Izz, Ixy, Ixz, Iyz: These options tensor component options are available when the Base Result property is set to Moment of Inertia.

    Note:  Note the following for the Component Reduction category:

    • It is only available when the Base Result property is set to Center of Gravity or Moment of Inertia.

    • Point Mass, Distributed Mass, and Imported Condensed Parts are ignored.

    • Only supported for 3D Flexible Bodies.

  6. When you solve, the read-only Value property displays the calculated mass, volume, center of gravity, or moment of inertia. You can parameterize this value.

See the Understanding the Criterion Calculations section for a description of the calculations used to obtain the criterion.