# Transient modal dynamic analysis

 A modal dynamic analysis: is used to analyze transient linear dynamic problems using modal superposition; can be performed only after a frequency extraction procedure since it bases the structure's response on the modes of the system; can use the high-performance SIM software architecture (see Using the SIM architecture for modal superposition dynamic analyses); can include nondiagonal damping effects (i.e., from material or element damping) only when using the SIM architecture; and is a linear perturbation procedure. The following topics are discussed:
 Related Topics Defining an analysis General and perturbation procedures About dynamic analysis procedures In Other Guides *MODAL DYNAMIC Configuring a modal dynamics procedure

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