Transient dynamic analysis

You perform ANSYS transient dynamics analyses in Pre/Post. You use transient dynamic analysis, also called time-history analysis, to determine the dynamic response of a structure when time-dependent loads are applied. You can use a transient dynamic analysis to determine the time-varying displacements, strains, stresses, and forces in a structure as it responds to a combination of loads.

Note:

In a transient dynamic analysis, the time scale of the loading is such that the inertia or damping effects are considered to be important.

This software supports the following methods to perform an ANSYS transient dynamic analysis:

• The full method.

• The mode superposition method.

The following table summarizes these two method.

Solution method	Description	Support for nonlinearities?
Full Method	Uses the full system matrices to calculate the transient response, with no matrix reduction.	YesSolutions can include all types of nonlinearities, such as plasticity, large deflections, and large strains.
Mode Superposition	Sums the factored mode shapes (eigenvectors) from a modal analysis to calculate the structure's response.	NoThis solution can be used only for linear systems.

The Transient Dynamic-Full Method uses the full system matrices to calculate the transient response of a model under time-dependent loads. Because this method uses full matrices, no mass matrix approximation or reduction is involved. The Transient Dynamic-Full Method is a more general calculation method than the Transient Dynamic—Mode Superposition method because it allows you to include all types of nonlinearities in the analysis, such as plasticity, large deflections, and large strains.

Where do I find it?

Application	Pre/Post
Prerequisite	A Simulation file as the displayed part and the work partANSYS as the specified solverStructural as the specified Analysis Type****Transient Dynamic-Full Method or Transient Dynamic-Mode Superposition as the specified Solution Type

Look up more details

Thermal-structural multiphysics analysis

Nonlinear buckling analysis

Performing a nonlinear buckling analysis

Harmonic analysis

Cyclic symmetry analysis in ANSYS

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Transient dynamic analysis, Simcenter 3D 2021.1 Series

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