摘要
对压力管道进行应力强度分析时不确定参数的分布函数较难获取。为弥补数据的不确定信息,首先,运用非概率可靠性方法计算压力管道一次应力与二次应力的非概率可靠性,其次,通过调整功能函数与不确定参数的位置关系进一步研究区间可靠性与凸模可靠性的计算特点。压力管道应力强度计算结果表明:凸模可靠性较区间可靠性,在非概率可靠性计算区间扩张方面更有优势,而且可以根据工程实际问题作出灵活响应。区间可靠性较凸模可靠性更为保守,在数据不足的情况下,区间可靠性可保证安全。
Distributing functions of uncertain parameters are difficult to obtain for stress strength analysis of pressure pipe.To make up for uncertain information,non-probabilistic reliability approach was used to calculate non-probabilistic reliability of primary and secondary stress strength of pressure piping. In addition,features of both interval reliability and convex model reliability were investigated by changing relative positions between functions and uncertain parameters in calculations. Results indicated that convex model reliability approach was more appropriate in interval extension and was more flexible to respond the practical issues of projects than interval reliability approach. However,interval reliability approach was more conservative and could ensure safety when there was insufficient data.
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2016年第3期44-49,共6页
Journal of Nanjing Tech University(Natural Science Edition)
基金
国家自然科学基金(51002015
51075199)
关键词
非概率可靠性
凸模可靠性
区间可靠性
压力管道
应力强度
non-probabilistic reliability
convex model reliability
interval reliability
pressure pipe
stress strength
