科研之友
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摘要
Based on the simple hinge crack model, the dynamic equation of transient response in a cracked rotor system is modelled; the numerical simulation solutions of the cracked rotor and the uncracked rotor are obtained from the model. The time-frequency features of the cracked and the uncracked rotors obtained by using the Wigner-Ville distribution are compared with those obtained by using the wavelet transform, the difference is presented. By simulation research, the sensitivity of the Wigner-Ville distribution and the wavelet transform to the stiffness variation is investigated; and the influence of the unbalance and the unbalance angle on the Wigner-Ville distribution and the wavelet transform is discussed. The time-frequency features are unique, which can be used as the criteria for identification of cracked rotor.
- 出版日期2004-9-6
- 单位上海交通大学
