华南理工大学学报（自然科学版）2026，Vol.54Issue(4)：19-29,11.DOI:10.12141/j.issn.1000-565X.250228
行星齿轮传动系统非线性点蚀故障动力学分析
Dynamics Analysis of Nonlinear Pitting Fault of Planetary Gear Transmission System
摘要
Abstract
When the planetary gear transmission system operates under extreme conditions such as poor lubrica-tion,it is prone to tooth surface pitting faults,which seriously affects the transmission accuracy and the service life.In order to ensure reliable operation of the system,it is necessary to deeply explore the dynamic characteristics of the system under pitting failure.In this paper,a nonlinear dynamic model of planetary gear transmission system coupling with multiple excitation factors is established by considering the time-varying meshing stiffness,time-varying friction,transmission error and backlash under pitting fault.The fourth-order Runge-Kutta numerical inte-gration method is used to solve the vibration differential equation of the system,and the vibration characteristics of the system under different rotational speeds and pitting faults are analyzed by means of time domain diagram,phase plane diagram,spectrum diagram,wavelet time-frequency diagram,three-dimension spectrum diagram and bifurca-tion diagram.The results show that the system exhibits rich nonlinear dynamic behaviors at different rotational speeds,including periodic motion,multi-periodic motion and chaotic motion;that the pitting fault of the gear tooth causes a sudden change in the vibration displacement of the system and reduces the stability of the system by chang-ing the time-varying meshing stiffness;and that,with the increase of rotational speed,the amplitude of system vibra-tion caused by the pitting fault also increases.Finally,the accuracy of the proposed model and calculation method is verified by building a dynamic characteristic test bench of planetary gear transmission system.This paper reveals the intrinsic relationship between pitting fault and system dynamic characteristics,and provides references for the fault diagnosis and condition monitoring of planetary gear transmission system.关键词
行星齿轮传动系统/点蚀故障/非线性动力学/分岔/混沌Key words
planetary gear transmission system/pitting failure/nonlinear dynamics/bifurcation/chaos分类
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莫帅,方淅,陈泽宇,赵新浩,陈素姣,周大坤,姚博炜,张伟..行星齿轮传动系统非线性点蚀故障动力学分析[J].华南理工大学学报（自然科学版）,2026,54(4):19-29,11.基金项目
广西杰出青年科学基金项目(2025GXNSFFA069016) （2025GXNSFFA069016）
广西科技重大专项(桂科 AA24263074,桂科AA23073019) （桂科 AA24263074,桂科AA23073019）
国家自然科学基金项目(52265004) Supported by the Guangxi Natural Science Fund for Distinguished Young Scholars(2025GXNSFFA069016),the Guangxi Science and Technology Major Program(Guike AA24263074,Guike AA23073019)and the National Natural Science Foundation of China(52265004) （52265004）
