Dynamic Analysis

The Dynamic (Modal) Analysis uses the mass and stiffness matrices to calculate natural frequencies and natural modes of vibration for a structure, due to free or unforced vibration. The analysis calculates the modes and frequencies of vibration for the model.

The following topics provide more detailed information regarding the Dynamic Analysis and related processes.

• Eigensolution - Eigensolution refers to the process used to calculate the modes for a Dynamic Analysis.

• Response Spectra - A Response Spectra Analysis uses the Dynamic Analysis frequencies to calculate forces, stresses and deflections in the model.

• Time History - A Time History Analysis uses the mass, stiffness and damping matrices to solve for the forced vibration of the structure due to an applied load that varies with time.