具有转静件碰摩故障双转子系统的动力学模型及其小波变换特征
Dynamic Model of Dual-Rotor System with Rub-Impact Fault Between Rotor and Stator and its Feature of Wavelet Transform
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摘要: 本文利用拉格朗日方程建立了具有碰摩故障的某型双转子航空发动机转子系统的动力学方程, 通过数值计算对该故障进行了仿真, 并对仿真结果进行了频谱分析和小波变换, 得出本文建立的双转子系统的动力学模型是正确的、利用小波变换对转静件碰摩故障进行诊断是非常有效的。Abstract: Using Lagrange′s equation,the dynamic equation of dual rotor system with rub impact fault of some type of aeroengine is established,and emulations of this fault is completed through numerical calculation.The spectral analysis and wavelet transform are also made,and the conclusions are drawn that the dynamic model of dual rotor system with rub impact fault is valid and the wavelet transform is a very effective tool to diagnose this fault.
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Key words:
- rotors /
- rub /
- fault diagnosis
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