Lumped Masses Tab - CAESAR II - Help

CAESAR II Users Guide (2019 Service Pack 1)

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English
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CAESAR II
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CAESAR II Version
11.0 (2019)

This tab displays for any selection of Analysis Type in the Dynamic Analysis window.

Adds or deletes mass from the model.

You can add extra mass, which is not considered significant in the static model (such as a flange pair) here. You can also add weights modeled as downward-acting concentrated forces here, because CAESAR II does not assume that concentrated forces are system weights (that is, forces due to gravity acting on a mass).

You can also delete masses from the static mass model to economize the analysis, which is the same as deleting degrees-of-freedom. If the system response to some dynamic load is isolated to specific sections of the piping system, you can remove other sections of the system from the dynamic model by removing their mass. Also, you can delete mass selectively for any of the three global coordinate directions when you want to delete directional degrees-of-freedom.

For example, if a piping system includes a structural frame where the piping rests on the structure and is connected to the structure only in the Y direction, these two systems are independent of each other in the X and Z directions. You can remove the X and Z mass of the structure without affecting the analysis results. With the X and Z masses removed, calculations proceed much faster.