汽车管带式散热器蠕变-疲劳确信可靠性的建模与分析  

Creep-fatigue reliability modeling and analysis for automotive tubular radiators

作　　者：张湘霄 杨选虎 李晓阳[1,2] 李梅珺 ZHANG Xiangxiao;YANG Xuanhu;LI Xiaoyang;LI Meijun(School of Reliability and Systems Engineering,Beihang University,Beijing 100191,China;Guihang Yonghong Cooler Company Shares,Guiyang 550025,China)

机构地区：[1]北京航空航天大学可靠性与系统工程学院,北京100191 [2]贵航股份永红散热器公司,贵阳550025

出　　处：《汽车安全与节能学报》2022年第1期157-167,共11页Journal of Automotive Safety and Energy

基　　金：国家自然基金资助项目(51775020)。

摘　　要：为汽车发动机管带式散热器的设计、制造、使用、维护,从可靠性原理出发,基于不确定理论,提出了一种散热器蠕变-疲劳可靠性建模与分析方法,分析该类散热器的可靠性。基于功能性能和失效分析,确定关键失效机理和性能参数;构建关键性能参数与其物理属性、外界条件、时间及失效判据的因果关系;量化其中不确定性,构建可靠性模型。用AA3003铝合金散热器对本方法进行验证,并发现将外界条件变异系数降低至5%后,散热器可靠度提高了0.1。结果表明:本方法刻画了汽车散热器可靠性的因果规律和不确定性的影响;降低外界条件的变异系数,可提高散热器的可靠度。A creep-fatigue reliability modeling and an analysis method were proposed for automobile engine tubular belt radiators based on the reliability science principle and the uncertainty theory to analyze the radiator reliability for the radiators’design,manufacture,operation and maintenance.Key failure mechanisms and performance parameters were determined based on functional performances and failure analysis,with constructing the causal relationship between key performance parameters,and their physical attributes,external conditions,time and failure criteria to quantify the uncertainty by using the uncertainty theory and the reliability model.An AA3003 aluminum alloy radiator was used to verify the proposed method,when the variation coefficient of external conditions is reduced to 5%,the radiator reliability increases by 0.1.The results show that the method describes the causal law and the uncertainty effect on the automotive radiator reliability,in addition,reducing the variation coefficient of external conditions improves the radiator reliability.

关 键 词：汽车散热器 蠕变疲劳 可靠性科学原理 累积损伤 不确定性 

分 类 号：TB114.3[理学—概率论与数理统计]