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  • Fatigue analysis is one application for which PSD analysis is useful.

  • Use a constant function to ensure that the magnitude of probable load is the same at all frequencies.

  • The shape of the power-spectral-density input function is dependent upon the probability of loading for each frequency, and the variation in likely load magnitude as a function of its frequency.

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TO DO (review and possibly delete):

  • The Hz in the denominator indicates that the probability is a density which may be integrated over the frequency range to produce a single RMS value.

See Also

  • Tutorial by Tom Irvine, July 28, 2000 (PDF) - obtain the PSD function from random vibration time-history data using a bandpass filtering method

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