转子支座松动故障的数值仿真与实验研究

Numerical Simulation and Experimental Research on Pedestal Looseness of a Rotor

根据工程实际情况,建立了轴承座地脚螺栓松动的力学模型,采用Adiletta提出的非线性油膜力模型,利用Runge-Kutta数值积分方法进行数值仿真。最后利用转子模型实验台,对支座松动故障进行实验研究,采用三维瀑布图、轴心轨迹图和小波尺度图对故障信号进行了分析研究。

Abstract. The mechanical model of looseness of anchor bolt on the bearing support was set up based on the project practice. Using the nonlinear oil- film model put forward by Adiletta, the dy- namic characteristics were investigated by numeri- cal Runge - Kutta method. At last, the experiment was made to investigate the pedestal looseness by model test rig and the fault signals were analyzed by the 3D waterfall spectra, trajectory and wavelet scalogram.