基于极变换与稀疏响应面的滚动轴承游隙可靠性分析

发布时间：2018-01-19 06:29

本文关键词： 滚动轴承游隙极变换误差预测稀疏响应面有限元　出处：《东北大学学报(自然科学版)》2017年11期 　论文类型：期刊论文

【摘要】：基于极变换提出一种选点方法,并结合稀疏响应面对滚动轴承游隙进行可靠性分析.构建响应面时,根据极变换后安全与失效类样本点在平面内的聚集性与可区分性,每一步迭代时增加临界样本点并对其进行拟合.为了避免过拟合,根据误差预测标准以及交叉验证方法对多项式响应面中最重要的项进行筛选.在建立滚动轴承游隙可靠性问题的极限状态函数时,考虑过盈装配、温度变化和离心力因素的影响,并基于有限元方法计算工作游隙.最后根据显式化的极限状态函数计算了轴承游隙可靠度.研究内容不仅为滚动轴承的设计提供了理论依据,而且为多维隐式可靠性问题的分析提供了一种参考途径.
[Abstract]:Based on pole transformation, a method of point selection is proposed, and the reliability analysis of rolling bearing clearance based on sparse response is carried out, and the response surface is constructed. According to the clustering and differentiability of the safety and failure sample points in the plane after polar transformation, the critical sample points are added and fitted in each step of iteration to avoid over-fitting. The most important items in the polynomial response surface are screened according to the error prediction standard and the cross validation method. The interference assembly is considered when establishing the limit state function of the rolling bearing clearance reliability problem. The influence of temperature change and centrifugal force. Finally, based on the explicit limit state function, the reliability of the bearing clearance is calculated. The research content not only provides a theoretical basis for the design of rolling bearings. It also provides a reference approach for the analysis of multidimensional implicit reliability problems.
【作者单位】：东北大学机械工程与自动化学院;中国航发沈阳发动机研究所;
【基金】：“高档数控机床与基础制造装备”科技重大专项资助项目(2013ZX04011011) 中央高校基本科研业务费专项资金资助项目(N140306004)
【分类号】：TH133.33
【正文快照】： 作为航空发动机中极其重要的部件,滚动轴承的寿命问题已经成为提高我国航空发动机推重比的障碍之一.轴承游隙是轴承设计与使用中的焦点问题,对轴承寿命的影响十分显著.近年来,有学者对轴承游隙做出了一些研究[1],并逐渐考虑了轴承结构尺寸、材料性能以及工况的随机性.随着计算

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