基于多体接触瞬态动力学的轴承故障与转子不平衡耦合分析  

Analysis on Coupling Between Bearing Fault and Rotor Unbalance Based on Multi-Body Dynamics with Transient Contact

作　　者：史守州 冯坤[1,2] 李宁 吕东旭 左彦飞 SHI Shouzhou;FENG Kun;LI Ning;LYU Dongxu;ZUO Yanfei(College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China;Beijing Key Laboratory of Health Monitoring and Self-Recovery for High-End Mechanical Equipment,Beijing University of Chemical Technology,Beijing 100029,China;Key Lab of Engine Health Monitoring-Control and Networking of Ministry of Education,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学机电工程学院,北京100029 [2]北京化工大学高端机械装备健康监控与自愈化北京市重点实验室,北京100029 [3]北京化工大学发动机健康监控及网络化教育部重点实验室,北京100029

出　　处：《轴承》2024年第10期124-131,共8页Bearing

基　　金：国家自然科学基金青年基金资助项目(51905025);中央高校基本科研业务费项目(JD2204)。

摘　　要：以典型带中介轴承的燃气轮机高压转子系统为研究对象,提出了复杂运动与接触状态下轴承、高压转子、柔性支承耦合多体动力学模拟方法,构建了滚动轴承-高压转子-局部薄壁支承系统的动力学模型,研究了单个滚动体、所有滚动体与轴承外圈瞬态接触力以及薄壁支承结构的振动速度和加速度响应。结果表明:轴承外圈故障与转子不平衡耦合状态下,轴承外圈故障特征频率被转频调制,其两侧存在差值为转频的边频带;不平衡量的位置离故障轴承越近,幅值调制现象越明显,转子转频和轴承外圈故障特征频率越大。Taking a typical high-pressure rotor system of gas turbine with inter-shaft bearings as research object,the simulation method for multi-body dynamics of coupled bearings,high-pressure rotor and flexible support under complex motion and contact state is put forward,the dynamic model of rolling bearings,high-pressure rotor and local thin-walled support system is constructed,and the transient contact force between a single rolling element,all rolling elements and bearing outer rings,as well as vibration velocity and acceleration response of thin-walled support structure are studied.The results indicate that under coupling state of bearing outer ring fault and rotor unbalance,the characteristic frequency of bearing outer ring fault is modulated by rotor frequency,and there are side frequency bands with difference of rotor frequency on both sides;as the position of unbalance is closer to faulty bearing,the amplitude modulation phenomenon is more obvious,and the rotor frequency and characteristic frequency of bearing outer ring fault are larger.

关 键 词：滚动轴承 燃气涡轮发动机 柔性多体动力学 不平衡 耦合分析 特征频率 

分 类 号：TH133.33[机械工程—机械制造及自动化] V231.92[航空宇航科学与技术—航空宇航推进理论与工程]