An FFT‐Based Spectral Analysis Method for Linear Discrete Dynamic Systems with Non‐Proportional Damping | Zendy

Jooyong Cho | Zendy; Usik Lee | Zendy

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An FFT‐Based Spectral Analysis Method for Linear Discrete Dynamic Systems with Non‐Proportional Damping

Author(s) -

Jooyong Cho,

Usik Lee

Publication year - 2005

Publication title -

shock and vibration

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.418

H-Index - 45

eISSN - 1875-9203

pISSN - 1070-9622

DOI - 10.1155/2006/537523

Subject(s) - fast fourier transform , modal analysis , vibration , spectral analysis , mathematics , modal , damping ratio , control theory (sociology) , computer science , algorithm , acoustics , physics , materials science , spectroscopy , control (management) , quantum mechanics , artificial intelligence , polymer chemistry

This paper proposes a fast Fourier transforms (FFT)-based spectral analysis method for the dynamic analysis of linear discrete dynamic systems which have non-proportional viscous damping and are subjected to non-zero initial conditions. To evaluate the proposed FFT-based spectral analysis method, the forced vibration of a three degree-of-freedom (DOF) system is considered as an illustrative problem. The accuracy of the proposed FFT-based spectral analysis method is evaluated by comparing the forced vibration responses obtained by the present FFT-based spectral analysis method with those obtained by using the well-known Runge-Kutta method and modal analysis method

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