多跨故障转子系统动态特性有限元仿真研究

对膜片联接的齿轮传动多跨转子系统进行了故障动态特性仿真研究.利用ANSYS有限元分析软件进行建模、仿真,根据在裂纹和碰摩故障工况下单跨转子与整个转子系统的固有频率在弯扭耦合振动下的变化情况,研究了系统的非线性动态特性和响应,以及膜片联轴器与齿轮对转子系统的影响.研究结果表明,此种情况下发生的故障对故障跨的影响比其余跨大;膜片联轴器和齿轮能够削弱或阻隔弯曲振动及裂纹故障对系统的不利影响,有助于故障诊断的定位与维修,也为产品设计提供参考.

Simulation of Dynamic Characteristics of Faulty Multi-span Rotor System Through FEA

The vibration characteristics of faulty multi-span geared rotor system with membrane coupling was modeled and simulated through the FEA(finite element analysis) software ANSYS.The nonlinear dynamic characteristics and responses of the rotor system,and the influences of membrane coupling and gearing on the rotor system were studied according to the change in inherent frequency due to bending-torsioning coupled vibration in the single-span rotor and the whole rotor system when cracks and rubbing fault happen.The results indicated that in such a case the influence on a faulty span is greater than on rests,and the adverse influences of bending vibration and cracks on the rotor system can be weakened or retarded by membrane coupling and gears.What were revealed is beneficial to the fault diagnosis and system maintenance and available to provide reference for designing products.