Absolute Method - CAESAR II - Help

CAESAR II Users Guide

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CAESAR II
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CAESAR II Version
13

This method defines the total system response as the sum of the absolute values of the individual modal responses. This is effectively the same as using the double sum method with all correlation coefficients equal to 1.0, or the grouping method, with all modes being closely spaced. The total system response is calculated as:

This method gives the most conservative result, because it assumes that the all maximum modal responses occur at the same time during the course of the applied load. This is usually overly-conservative, because modes with different natural frequencies will probably experience their maximum DLF at different times during the load profile.