基于概率功能度量的疲劳可靠寿命分析方法

doi:10.3969/j.issn.1000-1093.2016.08.027

兵工学报 ›› 2016, Vol. 37 ›› Issue (8): 1530-1535.doi: 10.3969/j.issn.1000-1093.2016.08.027

基于概率功能度量的疲劳可靠寿命分析方法

刘勤^1,2，孙志礼¹，钱云鹏²，刘英²

（1.东北大学机械工程与自动化学院，辽宁沈阳 110819；2.中国兵器科学研究院，北京 100089)

收稿日期:2016-01-06 修回日期:2016-01-06 上线日期:2016-09-30
通讯作者: 刘勤 E-mail:qinlow@126.com
作者简介:刘勤(1981—)，男，副研究员，博士研究生
基金资助:
总装备部预先研究项目（51319010103）；国防技术基础项目（Z092012B001）

Reliable Fatigue Life Analysis Method Based on Probabilistic Performance Measure

LIU Qin^1,2, SUN Zhi-li¹, QIAN Yun-peng², LIU Ying²

(1.School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, Liaoning, China;2.Ordnance Science and Research Academy of China, Beijing 100089, China)

Received:2016-01-06 Revised:2016-01-06 Online:2016-09-30
Contact: LIU Qin E-mail:qinlow@126.com

摘要/Abstract

摘要： 在分析疲劳寿命工程常用预计方法的基础上，引入功能度量法，建立疲劳可靠寿命模型，提出可靠寿命计算、灵敏度分析方法。该方法将可靠寿命的计算问题转换为一个球面约束的优化问题，只需进行一次概率功能度量的求解即可获得可靠寿命；利用计算过程的中间量，导出了可靠寿命对随机变量均值、标准差以及确定量的灵敏度计算公式。通过对某型车辆扭力轴的可靠寿命分析，证明基于概率功能度量的疲劳可靠寿命预计方法具有较好的效率和精度，灵敏度结果有效地反映出各变量对疲劳可靠寿命的影响程度。

关键词: 兵器科学与技术, 可靠寿命, 疲劳寿命, 概率功能度量, 灵敏度分析

Abstract: Based on the frequently-used engineering methods for fatigue life prediction and the performance measure approach, a reliable fatigue life model is built, and a set of methods for reliable life prediction and sensitivity analysis are proposed. By expressing fatigue life as the function of random variables, the reliable life prediction problem is converted into a spherical constraint optimization problem which can be solved using performance measure approach, and then the reliable life can be gotten directly. Moreover, the sensitivity factors for each random variable and deterministic variable can be calculated by using some intermediate variables in life prediction. The proposed method is demonstrated with a torsion shaft example. The results show that the proposed method has high efficiency and precision, and the different parameters have much different influences on reliable life.

Key words: ordnance science and technology, reliable life, fatigue life, probabilistic performance measure, sensitivity analysis

中图分类号:

TB114.3

刘勤，孙志礼，钱云鹏，刘英. 基于概率功能度量的疲劳可靠寿命分析方法[J]. 兵工学报, 2016, 37(8): 1530-1535.

LIU Qin, SUN Zhi-li, QIAN Yun-peng, LIU Ying. Reliable Fatigue Life Analysis Method Based on Probabilistic Performance Measure[J]. Acta Armamentarii, 2016, 37(8): 1530-1535.

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基于概率功能度量的疲劳可靠寿命分析方法

Reliable Fatigue Life Analysis Method Based on Probabilistic Performance Measure

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