Structural Analysis Wiki

Technical Terms Used in Dlubal Software

The Dlubal Structural Analysis Wiki explains technical terms used in structural analysis and design. The terms are given in alphabetical order and are usually used in Dlubal Software.

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M 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 in RF-/DYNAM Pro

It is possible to perform the modal analysis in RFEM or RSTAB by using the RF-/DYNAM Pro add-on module. 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.