摘要
为确定可靠性分析计算中的敏感性因素 ,提高分析结果的准确性 ,从概率分析的角度出发 ,研究了确定敏感性因素的分析方法 ,用该方法分析了结构静强度可靠度计算中的敏感性因素。在分析过程中 ,用随机变量来描述分析过程中的各种不确定性因素。每个随机变量用各自的概率分布形式和相应的分布参数描述。研究结果表明 :结构的静强度可靠度指标对外荷载比对抗力的取值更为敏感 。
The value of sensitive factors in structural system reliability analysis greatly affects reliability calculation results. These factors must be accurately determined and studied to improve the accuracy of calculated results. A sensitive factor analysis method based on probability was developed to analyze sensitive factors in structural strength reliability calculations. Random variables, defined by their probability distribution and corresponding distribution parameters, were used to describe uncertainties in the reliability calculation. The results show that this analytical method is effective and the strength reliability index is more sensitive to uncertainties of load than other factors, especially when the coefficient of variance is large.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2000年第6期108-111,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金! ( 5 94780 2 9)
关键词
结构可靠性
敏感性分析
敏感性因素
不确定性
structural reliability
sensitive analysis
sensitive factors
uncertainty
