论文部分内容阅读
以双盘悬臂转子系统为研究对象,建立了含不平衡-定点碰摩耦合故障的动力学模型.在耦合模型中,定点碰摩的碰摩力采用非线性滞回力模型来表征.在数值仿真过程中,采用线性插值法确定碰摩发生瞬时.利用数值仿真的结果分析机匣凸点材料的软、硬特性,凸点的凸出程度对转子碰摩响应的影响.结果表明:当凸点的材料较硬时,转子系统在较低的转速便会产生拟周期运动;对于较为尖锐的凸点,系统响应会表现出周期、拟周期等丰富的非线性动力学现象;转/静子间隙过小时,系统将在较宽的转速区间内产生复杂的非线性振动.
Taking a dual-disc cantilever rotor system as the research object, a dynamic model with unbalance-fixed-point friction coupling failure is established. In the coupled model, the rubbing force at fixed-point rubbing is characterized by a nonlinear hysteretic model.In the numerical simulation The linear interpolation method is used to determine the instantaneous impact of rubbing.The numerical simulation results show the soft and hard properties of the material of the bump of the casing and the degree of protrusion of the bump on the rub impact response of the rotor.The results show that when the bump When the material is hard, the rotor system will produce quasi-periodic motion at a lower rotational speed. For the more sharp bumps, the system response will exhibit rich nonlinear dynamic phenomena such as periodic and quasi-periodicity. Hour, the system will produce complex non-linear vibrations over a wide range of speeds.