Dynamic analysis determines time-dependent displacements and forces due to dynamic loads or nodal accelerations.
Dynamic analysis can be performed on linear or nonlinear models.
Solution method - Linear or nonlinear equilibrium equations are solved by the Newmark-beta method.
Acceleration functions can also be used for seismic analysis. In this case it is recommended to obtain proper seismic accelerograms and assign these functions to support nodes to analyse the effects of the earthquake. This method provides more exact results than the response spectrum analysis and can be used even if nonlinear elements are defined in the model (nonlinear supports, tension-only trusses, etc.). Its disadvantage is that it cannot be combined with other load types automatically.