How to Perform Response Spectrum Analysis - Lesson 1

Response spectrum is a mode superposition linear analysis that uses the results of a modal analysis with a known spectrum to calculate displacements and stresses in the model. Three types of input excitation spectrum are supported: displacement, velocity, and acceleration.  The mode coefficients are calculated by the program from the modal analysis participation factors and the spectrum values, and this is used to combine the modal responses to estimate the overall peak response; there is no deformed shape nor output as a function of time or frequency.

Video Highlights

00:16 - What is response spectrum analysis?

01:23 - Introduction of the input spectrum

01:45 - How to create response input spectrum

02:42 - How single-point response spectrum works

07:31 - How to choose the modes combination type

07:52 - How to apply response spectrum load

Simulation Files

Download the accompanying geometry and archived files here. Download Ansys Student for free here.