噪声与振动控制2025，Vol.45Issue(2)：14-20,7.DOI:10.3969/j.issn.1006-1355.2025.02.003
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
摘要
Abstract
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 calcu-lation results indicate that when the system has no rubbing coupling fault,the amplitude of the second harmonic gradually in-creases 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-mis-alignment 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Key words
vibration and wave/rotor system/rolling bearing/imbalance/misalignment/rubbing分类
机械工程引用本文复制引用
丘学文,南国防,李姚,姚夏..不对中-碰摩耦合转子非线性振动机理研究[J].噪声与振动控制,2025,45(2):14-20,7.基金项目
国家自然科学基金资助项目(52275118) （52275118）
