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中文摘要：
考虑刚性联轴节不对中和圆盘不平衡等因素，建立了不对中转子系统动力学模型，推导出系统运动微分方程。对运动微分方程进行数值积分，分析不对中转子系统的动力学行为。数值结果显示，刚性联轴节平行不对中时，故障特征频率主要成分为1X分量；振动经过充分衰减后，转子系统轴心轨迹是比较稳定的圆；随着质量偏心、平行不对中量的变化，驱动轴振动幅度可能大于从动轴振幅；平行不对中对支承刚度较小的转子系统的动态响应影响较大。
英文摘要：
The dynamical equation of parallel misalignment rotor-bearing systems is derived, using Lagrangian dynamics. The effect of the rigid coupling parallel misalignment and the rotor unbalance is examined with theoretical and numerical analysis. At steady state condition, the IX-rotational speed excitation is present in the lateral vibration direction, which indicates that parallel misalignment of the rigid coupling can be a source of lateral excitation. The axial locus of the rotor systems is a steady circle after full decay. Simulation results showed the amplitude of the driving shaft might be bigger than the driven shaft＇s. The effect of the transient response on the parallel misalignment to the rotor-bearing systems with less bearing stiffness is stronger.
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