地下管道动力可靠性分析的降维计算方法  

Dimension Reduction Method for the Dynamic Reliability Analysis of Underground Pipelines

作　　者：余建星[1,2] 郭君[1,2] 杜尊峰[1,2] 孙凡[1,2] 傅明炀[1,2] 郑金东[3] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]港口与海洋工程教育部天津市重点实验室,天津300072 [3]中国船级社福州分社,福州350001

出　　处：《天津大学学报》2009年第9期757-762,共6页Journal of Tianjin University(Science and Technology)

基　　金：国家自然科学基金资助项目(50579047);教育部博士点科研基金资助项目(20060056023);国家高技术研究发展(863)计划资助项目(2008AA09Z307)

摘　　要：地下管道是城市重要的基础工程之一,对其进行的地震作用下的可靠性分析是地下管道安全性的重要指标.但传统的可靠性分析只是针对单根管道进行分析与实际情况存在一定差异.本文采用系统可靠性理论对地震作用下的地下管线动力可靠性进行分析,并针对系统可靠性计算量大的难题,引入了PNET法(point evaluation technique)与谱系聚类分析法两种降维方法,在保证精度的同时大大提高了计算效率,使对地下管线的系统可靠性分析达到实用化程度.最后还结合实例进行了系统可靠性计算并对两种降维方法做了比较分析,提出了相应改进措施.Underground pipeline is one of the important infrastructure constructions of the city and its reliability analysis under earthquake action is a key index of the security of underground pipeline. However, the traditional reliability analysis focuses on single pipe, which is different from the real practice. The reliability analysis theory of structural systems is adopted in this paper to study the dynamic reliability of the underground pipeline. Two dimension reduction methods of point evaluation technique and pedigree clustering analysis were applied to the large amount of calculation in the reliability analysis of structural systems. With satisfactory calculation accuracy and computing time, the proposed approach proves to be a practical method for dynamic reliability analysis of the underground pipeline. An example was developed using this approach,and the results of the two dimension reduction methods were compared,through which some improvement measures were proposed.

关 键 词：地下管线 动力可靠性 结构系统可靠性分析理论 PNET法 谱系聚类分析法 

分 类 号：TE83[石油与天然气工程—油气储运工程]