摘要
为避免由于节点间距选择不当引起的结构可靠性评估误差,提出了一种基于Copula函数和确定性优化的结构可靠度评估方法。该方法在已有的可靠度评估方法的基础上,引入确定性优化求解焦元区间上的极值点,再由证据理论判定方法求得可靠度区间。计算结果表明:该方法对于极限状态函数为线性、非线性和隐函数均具有满意的计算结果,且计算效率较高。
A reliability evaluation method based on Copula functions and deterministic optimization was proposed,so that the structural reliability evaluation error caused by improper selection of node spacing can be avoided.Based on the existing reliability evaluation method,the deterministic optimization was introduced in the proposed method to solve the extreme points on the focal element interval,and then the reliability interval results can be obtained by using the evidence theory judgment method.Numerical results are shown that the proposed method has satisfactory calculation results for the linear,nonlinear and implicit functions of the limit state function,and the calculation efficiency is high.
作者
赵维涛
李久安
祁武超
ZHAO Weitao;LI Jiuan;QI Wuchao(School of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China)
出处
《兵器装备工程学报》
CAS
北大核心
2018年第12期196-201,共6页
Journal of Ordnance Equipment Engineering
基金
国家自然科学基金项目(11502149)
辽宁省自然科学基金项目(201602579)
关键词
结构可靠度
相关性
COPULA函数
确定性优化
structural reliability
correlation
Copula functions
deterministic optimization
