An FFT-Based Spectral Analysis Method for Linear Discrete Dynamic Systems with Non-Proportional Damping
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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.
2005 ◽
Vol 288
(1-2)
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pp. 293-306
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2007 ◽
Vol 345-346
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pp. 845-848
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2007 ◽
Vol 345-346
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pp. 861-864
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2005 ◽
Vol 29
(4)
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pp. 578-583
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2007 ◽
pp. 861-864
2001 ◽
Vol 33
(5-8)
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pp. 9
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