考虑区域冲击影响的系统竞争失效可靠性建模

doi:10.16182/j.issn1004731x.joss.20-0009

系统仿真学报 ›› 2021, Vol. 33 ›› Issue (5): 1070-1077.doi: 10.16182/j.issn1004731x.joss.20-0009

考虑区域冲击影响的系统竞争失效可靠性建模

胡启国, 高展

重庆交通大学机电与车辆工程学院,重庆 400074

收稿日期:2020-01-05 修回日期:2020-03-24 出版日期:2021-05-18 发布日期:2021-06-09
作者简介:胡启国(1968-),男,博士,教授,研究方向为机械可靠性分析与动力学分析。E-mail：swpihqg@126.com
基金资助:
国家自然科学基金(51375519); 重庆市基础科学与研究专项(cstc2015jcyjBX0133)

System Reliability Modeling in Competitive Failure Considering Zoned Shock Effect

Hu Qiguo, Gao Zhan

Department of Mechatronics and Vehicle Engineering, Chongqing Jiaotong University, Chongqing 400074, China

Received:2020-01-05 Revised:2020-03-24 Online:2021-05-18 Published:2021-06-09

摘要/Abstract

摘要： 冲击对系统可靠性产生一定影响,而如何量化冲击载荷的影响程度成为系统可靠性分析的关键。在退化失效与突发失效竞争的基础上,研究系统受到不同冲击强度影响下的可靠性模型精度问题。在失效阈值可变的情况下,以极值冲击描述冲击过程,Wiener过程描述两类失效的退化过程。针对不同强度冲击对系统的影响下,考虑对冲击进行载荷区域的划分,建立两类失效过程的分布函数,提出了系统竞争失效的可靠度模型。结合Sandia微引擎系统的具体参数进行仿真,验证了可靠性模型的正确性和有效性,且该模型能够有效提高系统竞争失效的可靠性精度。

关键词: 突发失效硬退化, 变失效阈值, 竞争失效, 区域冲击影响

Abstract: Shocks have certain effects on system reliability, and how to quantify the degree of shock loads becomes the key of system reliability analysis. The reliability modeling problem of system suffered from different shock strength is researched based on degradation process competing with sudden failure. Shock process is descripted by extreme shock and two types of degradation processes are descripted by Wiener process under the condition of shifting failure threshold. Aiming at different intensity shocks on the system, the different shock load suffered by zoned shock effect is partitioned, the distribution function of the two types of failure processes is established, and the reliability model of the competing failures of the system is proposed. The parameter simulation of the Sandia micro-engine system is carried out to verify the correctness and effectiveness of the reliability evaluation model, which can validly improves the accuracy of system competitive failure reliability.

Key words: sudden failure hard degradation, shifting threshold, competitive failure, zoned shock effect

中图分类号:

胡启国, 高展. 考虑区域冲击影响的系统竞争失效可靠性建模[J]. 系统仿真学报, 2021, 33(5): 1070-1077.

Hu Qiguo, Gao Zhan. System Reliability Modeling in Competitive Failure Considering Zoned Shock Effect[J]. Journal of System Simulation, 2021, 33(5): 1070-1077.

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考虑区域冲击影响的系统竞争失效可靠性建模

System Reliability Modeling in Competitive Failure Considering Zoned Shock Effect

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