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

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (6) : 74-77.

论文

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

曲秀秀;陈果;乔保栋

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SIGNAL SEPARATION TECHNOLOGY OF UNBALANCE-RUBBING-LOOSENESS COUPLING FAULTS OF DYNAMIC MODEL FOR ROTOR

QU Xiu-xiu; CHEN Guo;QIAO Bao-dong

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摘要

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

Abstract

An unbalance-rubbing-looseness coupling faults dynamic model for rotor is established. In the model, bearings were reduced to a linear spring, and the rotor shaft was considered as equisection Euler free beam model. While, the differential equations of the system were established, using modal truncation method. Then the vibration response of this rotor system was obtained by a fast- numerical intergral method. Clearly, the system response must be a mixture of multiple fault signals. In this paper blind source separation was used to achieve the separation of rotor fault signal. And ZT-3 multi-function rotor test device was experimentally. Simulation and experimental results show the correctness of the dynamic model in this paper, and the effectiveness of blind source separation approach in implementing the coupling fault isolation

导出引用

曲秀秀;陈果;乔保栋. 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 [J]. 振动与冲击, 2011, 30(6): 74-77

QU Xiu-xiu;CHEN Guo;QIAO Bao-dong. SIGNAL SEPARATION TECHNOLOGY OF UNBALANCE-RUBBING-LOOSENESS COUPLING FAULTS OF DYNAMIC MODEL FOR ROTOR[J]. Journal of Vibration and Shock, 2011, 30(6): 74-77