不平衡-碰摩-松动耦合故障的转子动力学建模与盲分离研究

建立了不平衡-碰摩-基础松动耦合故障的转子动力学模型。在模型中，轴承简化为线性弹簧，转子考虑为两端无约束的等截面自由欧拉梁，同时，建立了不平衡、碰摩和松动耦合转子动力学运动方程，运用模态截断法，利用数值积分方法获取转子系统的振动响应。显然，系统响应是多个耦合故障信号的混合，因此借助盲源分离方法进行了转子系统耦合故障信号分离研究，并运用ZT-3型多功能转子试验台进行了实验验证，仿真和实验结果表明了所建立故障动力学模型的正确性以及利用盲分离方法实施耦合故障分离的有效性

Signal separation technology for dynamic model of rotor with unbalance-rubbing-looseness couped faults

A dynamic model of rotor with unbalance-rubbing-looseness coupled faults was established.In the model,bearings were reduced to linear springs,and the rotor shaft was considered as free Euler beam with uniform cross section.The differential equations of the system were established,using modal truncation method.Then the vibration response of the rotor system was obtained by a fast-numerical intergral method.Clearly,the system response must be a mixture of multiple faults signals.Blind source separation was us...