基于悬索结构的体系可靠度方法研究.pdf

文档介绍：葛娟基于悬索结构的体系可靠度方法研究
:
基于悬索结构的体系可靠度方法研究
葛娟

中国水电顾问集团西北勘测设计研究院西安
( , 710065)
摘要在悬索结构构件可靠度的基础上以可靠度指标为失效模式识别的约界依据通过对体系可靠度主要失效
: , ,
模式识别的种计算方法的比较分析生成较为精简的失效树计算分析悬索结构的体系可靠度分析表明修正
3 , , 。:
的约界法在保证计算结果正确性的前提下可以较大程度地精简失效树悬索结构包含两个失效阶段的体系可
β, ;
靠度比包含一个失效阶段的体系可靠度低。
关键词:悬索结构;体系可靠度;主要失效模式;失效树
THE RESEARCH OF THEORY FOR SYSTEM RELIABILITY OF SUSPENDED STRUCTURE
Ge Juan
(Hydrochina Xibei Engineering Corporation,Xi’an 710065,China)
ABSTRACT:Based ponent failure of suspended structure,the reliability index is used as bounded basis for
failure modes recognition,the system reliability of suspended structure is obtained by a more streamlined failure tree
parative analysis of three methods of main failure modes recognition,and the following conclusions are
received:1)the amendment ofβboundary law can be a greater degree of streamlining the failure tree to ensure
accuracy of )the system reliability of the suspended structure consists of two invalidation phases is lower
than the system reliability of the suspended structure consists of one invalidation phase.
KEY WORDS:suspended structure;system reliability;main failure modes;failure tree
结构可靠度是指结构在规定的时间内在规定失效状态转移如何快速正确地生成结构体系失效
, ; 、
的条件下完成预定功能的概率。它是针对一个构件树的主干和主枝。本文以可靠度指标为失效模式识
或构件的一个截面的单一失效模式而言的。然而在别的约界依据,对体系可靠度主要失效模式识别的
实际工程中一个构件有许多截面而结构往往由诸种计算方法进行比较分析
, , 3 。
多构件组成一个或几个构件的失效会引起