中国机械工程2018，Vol.29Issue(7)：794-803,10.DOI:10.3969/j.issn.1004-132X.2018.07.007
多级载荷累积损伤下结构的动态可靠性分析
Time-dependent Reliability Analysis for Structures under Multi-level Loads and Cumulative Damages
摘要
Abstract
Under the functions together with various kinds of uncertainty factors and time factors in the service environments,strength degradation and cumulative damages on structures would be conducted,and thereby seriously affected the structural reliability.The traditional reliability model could not reflect the influences of loading sequence and strength degradation.The problems of the multi loads equivalent transformation were studied herein by using interval theory and considering nonlinear evolution phenomena of fatigue damages caused by the different loading sequences.Aiming at the strength degradation structures under the multi-level loads,the dynamic non-probabilistic relia-bility prediction model was established and the analytical method of time-dependent reliability was constructed based on an interval model.Finally,by calculating an example,the time-dependent relia-bility for structures under multi-level loads was analyzed,and the validities of the method and model were verified.关键词
动态可靠性/强度退化/多级载荷/加载次序/累积损伤Key words
time-dependent reliability/strength degradation/multi-level load/loading sequence/cumulative damage分类
通用工业技术引用本文复制引用
孙剑萍,汤兆平,罗意平..多级载荷累积损伤下结构的动态可靠性分析[J].中国机械工程,2018,29(7):794-803,10.基金项目
国家自然科学基金资助项目(51465017) （51465017）
江西省普通本科高校中青年教师发展计划访问学者专项资金资助项目(赣教办函[2016]169号) （赣教办函[2016]169号）
