摘要
针对多次区间载荷作用且结构随机强度退化和不退化的混合动态可靠性预测模型,用等效区间载荷代替多次区间载荷,并将该等效载荷视为均匀分布的随机变量,对均匀分布的随机载荷和结构的随机强度进行了当量标准正态化处理.根据应力-强度干涉理论,利用一次二阶矩法求得结构在多次区间载荷作用下的动态可靠度.最后,通过3个算例说明了文中方法的合理性、实用性和精确性.
This paper deals with the prediction model of structural hybrid dynamic reliability under multiple interval loads and with or without structural stochastic strength degradation.In the investigation,first,equivalent interval loads are used to substitute multiple interval loads and are taken as random variables with uniform distribution. Next,the random variables and the structural random strength are equivalently normalized.Then,the structural dy-namic reliability under multiple interval loads is calculated by using the first-order second-moment method according to the stress-strength interference theory.Finally,three numerical examples are presented to demonstrate the rationa-lity,practicability and accuracy of the proposed method.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第11期91-95,共5页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51175398)
毕节学院高层次人才科学研究项目(院科合字G2013007号)
关键词
结构
区间载荷
随机强度
动态可靠性
structure
interval load
random strength
dynamic reliability
作者简介
方永锋（1975-），男，博士，毕节学院副教授，主要从事结构与系统可靠性设计与检测、计算机辅助设计研究E-mail：fangyf_9707@126．com
