Structure Modification

In modal analysis, it is also possible to use structural modifications. You can utilize them to adjust the stiffness of objects or to consider specific nonlinearities, for example.

The following example shows how the natural frequency changes when reducing the stiffness of two column members to 70%.

Modal Analysis Without Structure Modification (Left) and with Reduced Column Stiffnesses (Right)

Detailed information can be found in the chapter Structure Modifications of the RFEM manual.