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| Framework of segment partition method for reliability design of long pipeline and rope |
| XIE Li-Yang, YANG Xiao-Fang, ZHOU Jin-Yu, WANG Xue-Min |
| College of M echanical Engineering and Automation，Northeastern University，Shenyang 110004，China |
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Abstract In order to establish the reliability model of long pipeline and rope，which is capable of reflecting the correlativity between virtual components，the present paper illuminates the segment partition principle of long pipeline and rope continuity system ，relationship between sizes of virtual segments and features of flaw distribution，distribution of segment intensity，the failure correlativity among components，relationships of segment sizes，relationships between distribution of system intensity and that of segment intensity and SO on．Based on these，under the precondition of eliminating the traditional hypothesis that failures of individual component in the same system are independent，failure probability model of continuity system is developed．Such model can reflect the“common-cause failure”—the failure correlativity generally existing in such system and it performs much better than the traditional reliability model of series system i'n matching the reality．Therefore，it has a wider application range．
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Published: 28 December 2004
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管道、缆绳等工程对象可靠性设计的单元化方法框架
为了建立能反映虚拟的“元件”间失效相关性的长管道或缆绳的可靠性模型。论述了管道、缆绳类连续系统的单元化(元件化)原则，虚拟单元的尺寸与缺陷分布特征的关系，单元强度分布及单元间的失效相关性与单元尺度的关系，系统强度分布与单元强度分布的关系等．以此为基础。在不作“系统中各元件的失效是相互独立的”这种传统假设的前提下。建立了连续系统失效概率模型．这样的模型能反映“共因失效”这种系统中普遍存在的失效相关性，比传统的串联系统可靠性模型更符合实际情况，有更大的应用范围．
关键词：
系统可靠性,
管道,
缆绳,
失效概率,
串联系统,
失效相关性
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