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2019-04-01
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Modal Analysis

A modal analysis allows for the dynamic analysis of structural systems capable of vibrating. As a result, natural vibration values are determined, such as natural frequency, a mode shape, modal mass, and effective modal mass factors.

The modal analysis is the basis for further dynamic analysis, such as for loading by a response spectrum or a time diagram. This is a completely linear method; the nonlinearities existing in the system are not taken into account.

Modal Analysis Add-on

A modal analysis can be performed in RFEM or RSTAB using the Modal Analysis add-on. In addition to the results of modal parameters in tables, the natural vibration modes are also available graphically for the evaluation.

Furthermore, the modal analysis represents a method for solving time history. In this case, the determined eigenvalues and mode shapes of the model are directly used.


Links
References
  1. Dlubal Software. (2020). Manual RF-DYNAM Pro. Tiefenbach: Dlubal Software.