Simulation and Experimental Study of Two-stage Rotor System with Misalignment-rub Fault
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摘要: 本文建立了通过齿式联轴器连接、滚动轴承支承的双盘转子动力学模型。该模型引入了齿式联轴器啮合力,不对中力和碰摩力。同时搭建转子实验台,并且进行了低转速下不对中-碰摩实验,研究转子在低速下的动力学特性和碰摩力特征。结果表明:低速实验下转子碰摩对于整体振动影响不大,在低转速下会产生一定的分数频率,并对倍频幅值产生一定影响;仿真结果显示,随着转速的增加,转子与静子产生碰摩,系统逐渐产生分数频率,并且系统的运动稳定性变差,碰摩力变得无规律。Abstract: In this paper, the dynamic model of a two-stage rotor system which is connected by a gear coupling and supported on ball bearings is established. The meshing force of gear, misalignment, and rub-impact are introduced into the model. Experiments on the rotor and its misalignment-rubbing faults at low speed are conducted. The nonlinear dynamic behavior of the rotor system is studied under fault conditions. The experimental data of the rotor system under misalignment-rub is analyzed. The results show that:the effect of rub fault on the rotor system is not clear under low speed; some frequency divisions appear and the double frequency amplitude has only a little change; the simulation results show that with the increasing of speed, the rub occurs between the rotor and the stator, sideband frequencies appear, the system becomes more unstable, and the change of rub-impact force is irregular.
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Key words:
- rotors /
- couplings /
- misalignment-rubbing fault /
- dynamics characteristics
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表 1 不对中故障下仿真和实验响应幅值变化
不对中量/
×10-4m结果 基频 2倍频 3倍频 4倍频 5倍频 0.7 仿真 0.95 -19.28 -21.86 -29.32 -35.82 实验 -5.62 -16.14 -24.85 -32.25 -36.81 1.4 仿真 0.95 -10.98 -13.71 -18.50 -21.92 实验 -5.96 -16.07 -20.62 -28.14 -21.43 2.1 仿真 1.10 -6.56 -9.01 -11.00 -18.71 0实验 0.25 -13.02 -14.27 -24.48 -27.81 -
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