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| Response analysis on linear imbalanced rotor-bearing system under nonstationary random seismic excitation |
| Revised:July 13, 2004 |
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| DOI：10.7511/jslx20063052 |
| KeyWord:rotor-bearing system,random vibration,pseudo excitation method,seismic excitation,harmonic excitation |
| ZHU Chang-sheng CHEN Yong-jun ZHU Wei-qiu |
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| Abstract: |
| An effective analysis method for a linear rotor-bearing system subjected to random seismic excitation is presented in this paper.The pseudo excitation method and Runge-Kutta integration scheme are used in a numerical example.By means of Kanai-Tajimi seismic model,displacement response,the power spectral density of displacement response and time-dependent variance of rotor's displacement response under random seismic and harmonic excitations for a rotor-bearing system with four degrees of freedom are analysed.Influence of rotational speed on the time-dependent displacement response variance and influence of sampling frequency on the time-dependent displacement response variance curve are discussed. |
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