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Stefan Hoffmann, M.Sc.
2022-05-31

FAQ 005265 | I need many mode shapes to achieve a sum of 90% effective modal mass...

FAQ|005265

Question:
I need many mode shapes to achieve a sum of 90% effective modal mass. Can I limit the number of mode shapes for generating equivalent loads?

Answer:
Yes, you can. Mode shapes with only a small portion of the effective modal mass can be ignored.

You can define this manually or use a filter in the program.

FAQ 005265 | I need many mode shapes to achieve a sum of 90% effective modal mass. Can I limit the number of mode shapes for generating
FAQ 005265 | Mode Shapes - Limiting Selection of Shapes

The selection of mode shapes also has a direct effect on the performance. The lower the number of mode shapes, the lower the number of the load cases to be generated.

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