弹性机匣双盘碰摩转子系统的稳定性

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振动与冲击 ›› 2010, Vol. 29 ›› Issue (8) : 52-54,5.

论文

弹性机匣双盘碰摩转子系统的稳定性

袁惠群1; 王正浩2，3; 闻邦椿2

作者信息 +

Analysis on Stability of Dual-disc Rub-impact Rotor with cinsideration of consideration of Casing Elasticity

YUAN Hui Qun1;WANG Zheng Hao2，3;WEN Bang Chun2

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文章历史 +

摘要

建立了计及机匣弹性、陀螺力矩并考虑轴承回转动力激励的悬臂双盘碰摩转子系统的动力学模型和运动微分方程，根据稳定性理论，由Jacobi矩阵特征值的性质分析了转子系统参数对转子系统解的稳定性的影响，并利用系统的阶跃响应和零极点分布图判别系统运动是否稳定。分析结果表明：轴承回转动力激励和碰摩对系统稳定性产生不利影响;两轴承刚度对稳定性影响基本相同，而两轴承的回转动力激励和两圆盘碰摩对稳定性影响明显不同；机匣连接刚度越小，机匣刚度越大，越有利于系统的稳定；轴承刚度大于临界轴承刚度时，系统存在稳定运动区域，否则系统不存在稳定运动区域。

Abstract

A dynamic model and differential equation of asymmetric dual-discs overhanging rotor system were established,taking into account the casing elasticity, rotary dynamic excitation of bearings, elastic connection between casing and stator, and gyroscopic effect. Based on the theory of stability, the system stability and the stability regions were studied by unvestigating theproperties of the jacibu matrix. The effects of different parameters on stability regions of the system were discussed. The step response curves and zero-pole map were utilized for identification of system stability quickly and directly. The results show that rotary dynamic excitation of bearing and rub-impact go against stable operation of the system; The influences of stiffness of the two bearings on stability are basically the same. The influence of the excitation of the two bearings and the rub-impact of the two discs on stability is different obviously. The smaller the elastic connection stiffness between casing and casing is, and the bigger the elastic connection stiffness between casing and stator is, the better the system stability is. When the stiffness is bigger than the critical bearings stiffness, there appearstability regions in the system; otherwise, there are no such regions.

导出引用

袁惠群;王正浩;闻邦椿. 弹性机匣双盘碰摩转子系统的稳定性[J]. 振动与冲击, 2010, 29(8): 52-54,5

YUAN Hui Qun;WANG Zheng Hao;WEN Bang Chun. Analysis on Stability of Dual-disc Rub-impact Rotor with cinsideration of consideration of Casing Elasticity[J]. Journal of Vibration and Shock, 2010, 29(8): 52-54,5