The analysis is using William-Wittricks metod for solving eigenvalues, This means that the model can be described with substructures, A beam can be divided up to eleven elements in one substructure depending on chosen accuracy, The modeling is very flexible, it can describe a big frame structure or a simple one mass - spring modell,
The beam can be a Euler-Bernouli type or a Timoshenko type,
The forced response calculation is made in a simple complex Gauss solver ,
The forced response modell can handle material damping in beams and springs and viscous dampers.