带有轴承间隙的裂纹转子分叉与混沌特性

Bifurcation and Chaos of a Cracked Rotor with Bearing Clearances

在考虑到轴承间隙的同时构造了开闭裂纹转子系统的动力学模型 ,依据此模型对裂纹转子的非线性特性进行了分析 ,结果表明 ,转子系统不但具有周期和拟周期解 ,而且还出现了分叉和混沌等非线性动力学现象。同时 ,对带有轴承间隙的裂纹转子所表现的特异症状进行了研究 。

Considering bearing clearances, a dynamic model of a switching crack rotor system is developed. Based on the model mentioned, the nonlinearity of the switching crack rotor is analysed. The results show that besides periodic and quasi periodic vibrations the rotor system shows different forms of bifurcation phenomena and chaotic motion of nonlinearity. In addition, characteristics of the rotor with fault are studied and good results are obtained. This is useful to fault diagnosis for rotating machinery.