Real domain pseudo excitation method for stationary random vibration responses

Zheng Hao-zhe

Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (12) : 85-87,1.

PDF(1052 KB)
PDF(1052 KB)
Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (12) : 85-87,1.
论文

Real domain pseudo excitation method for stationary random vibration responses

  • Zheng Hao-zhe
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Abstract

A real domain pseudo-excitation method (PEM) is proposed for computing the power spectral density (PSD) of the linear time variant systems subjected to stationary stochastic external excitations. This method consists of that in accordance with relationship between the Hartley transform and Fourier transform to construct the real pseudo exceptions and to determine the real transfer function, to compute the real pseudo response of structure, and to calculate the PSD of random vibration responses. The results show that the statistical relevancies and coherences among the excitations can be easily evaluated; compared with the traditional complex field PEM, using real pseudo excitations and real pseudo responses to evaluate the PSD of structural random vibrations responses, this method is simpler and practicable.

Key words

random vibration / linear time-invariant system / pseudo excitation method / Hartley transform

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Zheng Hao-zhe. Real domain pseudo excitation method for stationary random vibration responses[J]. Journal of Vibration and Shock, 2011, 30(12): 85-87,1
PDF(1052 KB)

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