摘要
提出了X80钢管道参数设计的可靠度反分析方法,分析了设计变量服从正态分布和非正态分布情况的随机可靠度反问题计算理论。将基于一次二阶矩结构可靠度理论的几何算法引入到可靠度反问题中,通过有限步长λ的选择来加速设计验算点的收敛速度,并采用Matlab软件开发了相应的计算程序。以西气东输二线X80钢输气管道参数设计为例,介绍了可靠度反问题的应用,给出了参数设计的反问题计算结果,并对结果进行分析。算例证明该方法的有效性和适用性,可以解决X80钢管道参数设计的可靠度反分析问题。
Reliability inverse analysis method of X80 pipeline parameter design is proposed. Considering the condition of normal and non - normal distribution for design variables, the inverse problem calculation theory of stochastic reliability is analyzed. Based on the first order second moment reliability theory, geo- metric algorithm is introduced to solve inverse problem. Convergence rate of checking point is accelerated by step length choice, and the corresponding calculation program about reliability inverse problem is de- veloped by Matlab. Taking X80 pipeline of west - east gas project as an example, the results of reliability inverse problem for pipeline parameters are given and analyzed. Also, the example results show that the method is credible and has high precise. Therefore, the method can be applied in the X80 pipeline pa- rameter design.
出处
《压力容器》
北大核心
2010年第8期19-23,共5页
Pressure Vessel Technology
基金
中国石油集团重点实验室资助课题(2008A-3005)
川气东送管道工程关键技术研究(P06286)
关键词
可靠度
反问题
几何算法
X80钢管道
参数设计
reliability index
inverse problem
geometric algorithm
X80 pipeline
parameter design
