不对中-碰摩耦合转子非线性振动机理研究  

Nonlinear Vibration Mechanism of Misalignment-rub Impact Coupling Fault in Rotor Systems

作　　者：丘学文 南国防[1] 李姚 姚夏 QIU Xuewen;NAN Guofang;LI Yao;YAO Xia(School of Energy and Power Engineering,Shanghai University of Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《噪声与振动控制》2025年第2期14-20,共7页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(52275118)。

摘　　要：建立含6自由度滚动轴承支承下不平衡-不对中-碰摩转子系统动力学模型,推导其方程并采用四阶RungeKutta法对方程进行求解,研究不对中量和偏心量对系统振动响应的影响机理。计算结果表明,当系统没有发生碰摩耦合故障时,随着不对中量的增加,二倍频幅值逐渐增大,一倍频幅值逐渐减小,系统约在临界转速一半位置发生二倍频共振现象;当发生碰摩耦合故障时,系统产生分次谐波和高次谐波,偏心量与不对中量增加均会加剧系统碰摩程度。基于有限元分析软件,采用瞬态动力学分析方法计算滚动轴承支承下的不平衡-不对中转子振动响应,将计算结果与理论计算结果进行对比,两者吻合较好,理论建模方法的正确性得到验证。A dynamic model of the imbalance-misalignment-rub impact coupling rotor system supported by a 6-DOF rolling bearing was established.Its governing equation was derived and solved by the fourth-order Runge-Kutta method.The mechanism of the influence of misalignment and eccentricity on the vibration response of the system was studied.The calculation results indicate that when the system has no rubbing coupling fault,the amplitude of the second harmonic gradually increases with the increase of the misalignment,while the amplitude of the first harmonic gradually decreases with the increase of the misalignment.There is a second harmonic resonance phenomenon at about half of the critical speed position;When the rub-impact coupling fault occurs,the system will generate sub-harmonics and higher harmonics,and an increase of the amount of imbalance and misalignment will exacerbate the degree of rub-impact in the system.Based on the finite element analysis software,the transient dynamic analysis method was used to calculate the vibration response of the imbalance-misalignment rotor supported by the rolling bearing.The calculated results were compared with the theoretical results,and the correctness of the theoretical modeling method was verified.

关 键 词：振动与波 转子系统 滚动轴承 不平衡 不对中 碰摩 

分 类 号：TH113.1[机械工程—机械设计及理论]