基于分段位移激励函数的贯穿式故障建模及滚动轴承振动特性分析  

Through-fault modeling and vibration characteristic analysis of rolling bearing based on piecewise displacement excitation function

作　　者：罗丫[1] 葛可可 袁晓文 涂文兵 LUO Ya;GE Keke;YUAN Xiaowen;TU Wenbing(State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330013,China;School of Mechatronic and Vehicle Engineering,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学轨道交通基础设施性能监测与保障国家重点实验室,江西南昌330013 [2]华东交通大学机电与车辆工程学院,江西南昌330013

出　　处：《工程设计学报》2025年第1期112-120,共9页Chinese Journal of Engineering Design

基　　金：国家自然科学基金资助项目(52365010);江西省教育厅科学技术研究项目(GJJ2200603);江西省自然科学基金资助项目(20242BAB25262)。

摘　　要：在传统的滚动轴承故障建模中,大多采用半正弦函数来描述位移激励,忽略了故障边缘的刚度弱化效应,导致模型与实际存在偏差。以NU306局部故障轴承为研究对象,考虑故障前后滚道的弹性变形,提出了一种新的分段位移激励函数。采用有限元分析方法确定了函数的系数,并将系数代入滚动轴承动力学模型中,对比分析了不同故障宽度下采用分段位移激励函数与传统半正弦位移激励函数时轴承的振动特性。结果表明:分段位移激励函数更加符合实际情况,所得到的振动信号与实验结果更吻合;基于分段位移激励函数的轴承振动响应曲线比基于传统位移激励函数的平缓。研究结果为深入研究局部故障滚动轴承的振动特性提供了一定的参考。In the traditional rolling bearing fault modeling,half-sine function is used to describe the displacement excitation,and the stiffness weakening effect at the fault edge is ignored,which leads to the deviation between the model and the reality.Taking NU306 bearing with local faults as the research object,a new piecewise displacement excitation function was proposed considering the elastic deformation of raceway before and after a fault.The coefficients of the function were determined by finite element analysis method and incorporated into the dynamic model of rolling bearing.The vibration characteristics of bearing under different fault widths using piecewise displacement excitation function and traditional half-sine displacement excitation function were compared and analyzed.The 163.com,https://orcid.org/0000-0001-7126-1214 results showed that the piecewise displacement excitation function was more in line with the actual situation,and the obtained vibration signals were more consistent with the experimental results.Additionally,the bearing vibration response curve based on the piecewise displacement excitation function was smoother than that based on the traditional displacement excitation function.The research results provide a certain reference for in-depth study of vibration characteristics of rolling bearings with local faults.

关 键 词：滚动轴承 位移激励 振动特性 

分 类 号：TH133.3[机械工程—机械制造及自动化]