中文摘要：

从轴承载荷出发,考虑轴承非线性油膜力、转子偏心质量、轴承座的振动,建立了扭矩激励下单跨转子轴承系统的数学模型,并对该模型进行了求解和仿真,得到了无扭矩激励和扭矩激励下转轴的时域、频域以及轴心轨迹仿真图形。最后,将仿真信号与在搭建的试验台上采集的信号进行对比,试验结果和仿真结果的一致验证了该模型的正确性,揭示了扭矩激励、轴承载荷与转子弯曲振动之间的密切联系,为研究扭矩激励对转子轴承系统的影响提供了一种新的思路。

英文摘要：

Basing on bearing load,considering the nonlinear oil film force of bearing, rotor eccentric mass and bearing vibration, a mathematical model of single span rotor-bearing system under torque excitation is established. Solving and simulation of this model is conducted, getting the waveform of time .domain, frequency domain and axis orbit of the shaft under no torque excitation and torque excitation respectively .Finally, comparison between the simulation signal and the experiment signal that acquire from the setting-up experiment equipment is held. The consistency of the experiment and the simulation prove the correctness of this model, revealling the interaction of torque excitation, bearing load and bending vibration of the shaft, providing a new way that how torque excitation influence the rotor-bearing system.