System reliability assessment under real time-varying environmental stress

被引：0
|
作者：
Lan J. [1 ]
Yuan H. [1 ]
Yuan M. [1 ]
Xia J. [1 ]
机构：
[1] School of Reliability and System Engineering, Beijing University of Aeronautics and Astronautics, Beijing
来源：
Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics | 2018年 / 44卷 / 02期
关键词：
Accelerated life test; Acceleration model; Real environmental stress; Reliability assessment; Time-varying stress;
D O I：
10.13700/j.bh.1001-5965.2017.0120
中图分类号：
学科分类号：
摘要：
The traditional reliability evaluation methods only consider the product under constant stress. However, products are often directly exposed to the outdoor natural environment in actual engineering, and the working environment stress or storage environment stress varies with time. Aimed to solve this problem, the natural environmental stress of the typical geographical location is introduced, and the environmental stress variation tendency is derived by using six-parameter polynomial fitting method. Moreover, two modes of the time-varying environmental stress are assumed, and on the basis of Nelson cumulative damage model, the product reliability evaluation method based on accelerated life test data is studied under the real time-varying environmental stress. The results show that the reliability life of the products at different geographical locations is quite different, and the reliability of the products can be evaluated more accurately by introducing the real environmental stress of the geographical location of the product. © 2018, Editorial Board of JBUAA. All right reserved.
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页码：406 / 412
页数：6
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