Response spectrum analysis

A response spectrum analysis:

  • provides an estimate of the peak linear response of a structure to dynamic motion provided in the form of a displacement, velocity, or acceleration spectrum;

  • is typically used to analyze response to a seismic event;

  • assumes that the system's response is linear so that it can be analyzed in the frequency domain using its natural modes, which must be extracted in a previous eigenfrequency extraction step (Natural frequency extraction);

  • can use the high-performance SIM software architecture (see Using the SIM architecture for modal superposition dynamic analyses); and

  • is a linear perturbation procedure and is, therefore, not appropriate if the excitation is so severe that nonlinear effects in the system are important.

The following topics are discussed:

Related Topics
About dynamic analysis procedures
Defining an analysis
General and perturbation procedures
In Other Guides
Configuring a response spectrum procedure
Defining a spectrum