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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
In this paper, the dynamic equations of a rotor system of a two-rotor aeroengine with rub-impact fault are established by using Lagrange equations. The fault is simulated by numerical calculation and the spectrum analysis and wavelet transform of the simulation results are obtained The dynamic model of dual-rotor system established in this paper is correct. It is very effective to use the wavelet transform to diagnose rub-impact faults