Include Pseudostatic (Anchor Movement) Components (Y/N) - CAESAR II - Help

CAESAR II Users Guide

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English
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CAESAR II
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CAESAR II Version
13

(Available for: Spectrum with ISM included)

Specifies the inclusion of independent support motion (anchor movement) components as part of a shock load case and independent support spectral loadings, as described below. Select Y (for yes) to include the components or N (for no) to ignore them.

The excitation of a group of supports produces both a dynamic response and a static response. The static response is due to the movement of one group of supports or anchors relative to another group of supports or anchors. These static components of the dynamic shock loads are called pseudostatic components. USNRC recommendations (August 1985) suggest the following procedure for pseudostatic components:

  1. For each support group, calculate the maximum absolute response for each input direction.

  2. Combine same direction responses using the absolute sum method.

  3. Combine directional responses using the SRSS method.

  4. Obtain the total response by combining the dynamic and pseudostatic responses, using the SRSS method.