小样本下考虑磨损退化的机构时变可靠性分析

Time⁃Varying Reliability Analysis of Mechanisms Considering Wear Degradation under Small Samples

王佳聪 高鹏 常筠袖 田思祺 崔永海

Jiacong WANG Peng GAO Junxiu CHANG Siqi TIAN Yonghai CUI

辽宁石油化工大学 机械工程学院, 辽宁 抚顺 113001 中国石油锦州石化公司, 辽宁 锦州 121001 抚顺新钢铁有限责任公司, 辽宁 抚顺 113001

School of Mechanical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China PetroChina Jinzhou Petrochemical Company，Jinzhou Liaoning 121001，China Fushun New Steel Corporation Ltd. ，Fushun Liaoning 113001，China

零部件的性能退化对机构的运动输出性能有很大影响。考虑磨损退化这一累积性因素，在小样本的前提下，提出了机构时变可靠性的分析方法。此分析方法应用ADAMS与MATLAB的联合仿真，以Archard磨损模型为基础，计算销轴半径退化量；将销轴半径退化量考虑为时间序列问题，根据RSM方法建立机构功能函数，结合ARIMA方法预测后续磨损周期下机构响应值变化，实现数据样本扩展；以应力强度干涉模型为基础，建立机构极限状态方程，计算时变可靠度。通过曲柄滑块机构，证明了这一方法的便捷性与准确性。

The motion output accuracy of the mechanism has been significantly affected by the performance degradation of components. In this paper, the cumulative factor of wear degradation is considered. On the premise of small samples, an analysis method of time?varying reliability of mechanisms is proposed. This analysis method applies the cosimulation of ADAMS and MATLAB. Based on the Archard wear model, the pin radius degradation is calculated and considered as a time series problem. The mechanism function is established according to the RSM method, and the ARIMA method is used to predict the change of the mechanism response value under the subsequent wear cycle to expand the data samples. Based on the interference model of stress?strength,the limit state equation of mechanism is established and the time?varying reliability is calculated. The convenience and accuracy of this method are demonstrated with a crank?slider mechanism.

国家自然科学基金项目(51505207);辽宁省高等学校创新人才支持计划资助项目(LR2017070);辽宁省教育厅科学研究经费项目(L2019019);抚顺市“抚顺英才计划”资助项目(FSYC202107014)

10.12422/j.issn.1672-6952.2023.05.009