Simcenter Femap & Nastran

Random Vibration Analysis in Simcenter Femap

March 05, 2016

UPDATED: June 27, 2023 – Updated with specific info for certain industries for a comprehensive look at PSD random vibration in FEMAP. Now with examples showing different options for PSD analysis. Updated with corrected PDF.



Random vibration is vibration which can only be described in a statistical sense. The magnitude at any given moment is not known, but is instead described in a statistical sense via mean values and standard deviations.

Random vibration problems arise due to earthquakes, tsunamis, acoustic excitation (e.g., rocket launches), wind fluctuations, or any loading which is inherently random. Often random noise due to operating or transporting conditions can also be considered. These random vibrations are usually described in terms of a power spectral density (PSD) function.

In this white paper we will cover steps to create a PSD analysis in FEMAP, and compare the results to an analytical solution.

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