How to use point mass

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Objective:

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Applies To:

• Static Analysis
• Topology Optimization

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Procedure:

• Point: FE Point to create a domain from.
• Attribute: Point Attribute to define the remote mass parameters.

• Mass: This assigns a mass to the remote point
• Offset: The offset is used to specify the center of rotation for the inertia calculations. By default, the center of rotation is at the point defined in the FE Component block. This location will be moved from the point by the offset distance specified in this input. This input follows the Frame definition in the block, which is the global coordinate system by default.
• Inertia ij: This defines the six components of the mass moments of inertia tensor
• Frame: The frame is used to define the offset directions as well as the axes used to calculate the mass moment of inertia components

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Example

1. Add a second Solid Domain to the Simulation Model.
2. In the Point input, specify the x, y, and z location of the camera’s center of mass. In the attached example, this point is specified as a variable that contains the camera’s center of mass property.
3. To the Attributes input, add a Point Attribute and input the mass properties of the camera. In the attached example, a mass of 200 g was specified in this block.
4. In the Connectors input of the Simulation Model, add the Rigid Connector block.
5. Enter the coordinates of the point representing the camera’s center of mass. Here, the center of mass variable was used to specify this input, just like the Solid Domain block.
6. Define the Boundary that the remote mass is connected to.
7. Finally, specify the connector type. In this example, the Flexible (RBE3) connector was used.