Mass Idealizations—Creo Ansys Simulation
A mass or point mass idealization is used to represent a concentrated mass without stiffness and no specific shape. The mass and shape of an object determines how the object resists translation and rotation. You can use a point mass idealization to study how the model behaves with that mass located at a particular location without specifying the entire geometry. A point mass idealization is considered as located at the centroid of the selected reference. If multiple location references are selected the point mass is considered to be at the centroid of their centroids.
The mass must be connected to the model by selected geometrical references. The mass only has an effect if gravity, acceleration or centrifugal loads are also defined for the study.
To Define a Mass Idealization
1. Click > 
Mass. The Point Mass Definition dialog box opens.
Mass. The Point Mass Definition dialog box opens.2. Select the reference, or references where the point mass idealization is to be located. Your selection is shown in the Location collector. Valid references are vertices, edges, curves, surfaces, bodies, components or a single datum point. The point mass is created at the centroid of centroids of the selected location references. You can select multiple references of the same type only.
3. Connected references are automatically selected based on the location references and are displayed in the Connected references collector. Optionally, click the collector and select alternative references that are connected to the location references. Valid references are vertices, edges, curves or surfaces. You can select multiple references of the same type only.
4. Specify a positive real number, a parameter, or an expression that evaluates to a positive real number as the value of mass.
5. Click OK to define the mass and to save it.