基于连续应力与离散应力综合的加速退化试验设计方法研究

doi:10.3901/JME.2020.02.201

机械工程学报 ›› 2020, Vol. 56 ›› Issue (2): 201-209.doi: 10.3901/JME.2020.02.201

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基于连续应力与离散应力综合的加速退化试验设计方法研究

钟立强¹, 陈文华¹, 钱萍¹, 潘骏¹, 贺青川¹, 高亮²

1. 浙江理工大学机电产品可靠性分析与测试国家地方联合工程研究中心杭州 310018;
2. 四川农业大学机电学院雅安 625014

收稿日期:2019-04-30 修回日期:2019-08-06 出版日期:2020-01-20 发布日期:2020-03-11
通讯作者: 陈文华(通信作者),男,1963年出生,博士,教授,博士研究生导师。主要研究方向为可靠性设计、试验及统计分析。E-mail:chenwh@zstu.edu.cn
作者简介:钟立强,男,1989年出生,博士研究生。主要研究方向为加速退化试验。E-mail:13588207479@163.com
基金资助:
国家自然科学基金资助项目（51305402，51275480）。

Research on Design Method of Accelerated Degradation Test Based on Continuous Stress and Discrete Stress

ZHONG Liqiang¹, CHEN Wenhua¹, QIAN Ping¹, PAN Jun¹, HE Qingchuan¹, GAO Liang²

1. National and Local Joint Engineering Research Center of Reliability Analysis and Testing for Mechanical and Electrical Products, Zhejiang Sci-Tech University, Hangzhou 310018;
2. College of Mechanical and Electrical Engineering, Sichuan Agricultural University, Ya'an 625014

Received:2019-04-30 Revised:2019-08-06 Online:2020-01-20 Published:2020-03-11

摘要/Abstract

摘要： 现有的加速试验方法只适用于连续应力的情形，但是离散应力在产品的实际工况中普遍存在，为了扩展加速试验的应用范围，有必要将离散应力纳入到加速应力的范畴。分析比较连续应力与离散应力的特点，并建立通过加速系数折算不同应力水平下的离散应力间隔时间转换准则，实现两种不同形式应力的综合；基于Wiener过程建立连续-离散应力综合时的产品性能退化模型，提出分组序贯加速退化试验设计方法，采用两目标分步优化方法得到最优试验方案及折衷试验方案，并与传统试验方案进行比较，结果表明所设计的试验方案要好于传统试验方案；以电连接器考虑插拔时的贮存寿命评估作为应用案例，计算结果表明，考虑插拔后电连接器的贮存寿命减少约40%，从而验证所建方法的有效性。

关键词: 加速退化试验, 连续应力, 离散应力, 试验方案, 电连接器

Abstract: The existing accelerated test methods are only applicable to the case of continuous stress, but the discrete stress is very common in actual working conditions of products. In order to expand the application range of accelerated test, it is necessary to incorporate the discrete stress into the category of accelerated stress. The characteristics of continuous stress and discrete stress are compared, and the definitions of two kinds of stress are given. A criterion for calculating discrete stress interval time under different stress levels by acceleration coefficient is proposed, and these two types of stress are integrated. Based on the Wiener process, a product performance degradation model considering continuous-discrete stress is established. A grouped sequential design method for accelerated degradation test is proposed, and the optimal test plan and compromise test plan are obtained by two-objective step optimization method. Ccompared with the traditional test plan,it shows that the designed schemes are better. Taking the storage life evaluation of the electrical connector as an application case, the calculation results show that the storage life of the electrical connector is reduced by about 40% after considering the insertion force, thus verifying the effectiveness of the proposed method.

Key words: accelerated degradation test, continuous stress, discrete stress, test plan, electrical connector

中图分类号:

TB114
V442

钟立强, 陈文华, 钱萍, 潘骏, 贺青川, 高亮. 基于连续应力与离散应力综合的加速退化试验设计方法研究[J]. 机械工程学报, 2020, 56(2): 201-209.

ZHONG Liqiang, CHEN Wenhua, QIAN Ping, PAN Jun, HE Qingchuan, GAO Liang. Research on Design Method of Accelerated Degradation Test Based on Continuous Stress and Discrete Stress[J]. Journal of Mechanical Engineering, 2020, 56(2): 201-209.

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基于连续应力与离散应力综合的加速退化试验设计方法研究

Research on Design Method of Accelerated Degradation Test Based on Continuous Stress and Discrete Stress

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