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 ,其结果可用于旋转机械的故障诊断 Considering the bearing clearance, a dynamic model of the open-close cracked rotor system is constructed. Based on this model, the nonlinear characteristics of the cracked rotor are analyzed. The results show that the rotor system has not only periodic and quasi-periodic solutions, but also Bifurcation and chaos and other nonlinear dynamics. At the same time, the specific symptoms of cracked rotor with bearing clearance were studied, the results can be used for fault diagnosis of rotating machinery