工程设计学报2025，Vol.32Issue(1)：112-120,9.DOI:10.3785/j.issn.1006-754X.2025.04.123
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
摘要
Abstract
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 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Key words
rolling bearing/displacement excitation/vibration characteristics分类
机械工程引用本文复制引用
罗丫,葛可可,袁晓文,涂文兵..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[J].工程设计学报,2025,32(1):112-120,9.基金项目
国家自然科学基金资助项目(52365010) （52365010）
江西省教育厅科学技术研究项目(GJJ2200603) （GJJ2200603）
江西省自然科学基金资助项目(20242BAB25262) （20242BAB25262）
