The Modal Analysis add-on allows you to quickly and conveniently analyze natural frequencies and mode shapes for member, surface, and solid models.
All required input values are imported from RFEM/RSTAB. Powerful eigenvalue solvers (such as Lanczos, subspace iteration, and so on) are available to determine up to 9,999 eigenvalues.
In the Response Spectrum Analysis add-on, the seismic analysis is performed using the multi-modal response spectrum analysis. The spectra required for this can be created in compliance with the standards or user-defined. From this, the equivalent static forces are generated.
The add-on includes an extensive library of accelerograms from seismic zones. These can be used to generate response spectra.