The Response Spectrum system calculates the maximum response for a given excitation based upon the input response spectrum and the method used to combine the modal responses. The combination methods available are the Square Root of the Sum of the Squares (SRSS), the Complete Quadratic Combination (CQC) and the Rosenblueth’s Double Sum Combination (ROSE). A response spectrum analysis has similarities to a random vibration analysis. However, unlike a random vibration analysis, responses from a response spectrum analysis are deterministic maxima.
This analysis is configured in the Mechanical application, which uses either the Ansys solver to compute the solution.
A Response Spectrum analysis must follow a Modal analysis that extracts the natural frequencies and mode shape. Follow the instructions in Modal to build a Modal analysis system and then complete the following instructions to build and link a Response Spectrum system.
To work through a Response Spectrum system:
From the Modal analysis system, right-click the Solution cell and select > .
Workbench creates a new Response Spectrum system. The Engineering Data, Geometry, and Model cells are linked, and the Modal system Solution cell is linked to the Response Spectrum system Setup cell.
To open the Mechanical application, right-click the Setup cell in the Response Spectrum system and select or double-click the Setup cell.
In the Mechanical application window, complete your analysis using the application's tools and features.
See Response Spectrum Analysis in the Mechanical User's Guide for more information on conducting this analysis.
On the Project tab toolbar, click .