Reliability analysis of ship structure system with multi-defects

IMR OpenIR

	Reliability analysis of ship structure system with multi-defects
其他题名	Reliability analysis of ship structure system with multi-defects
	An Hai 1; An WeiGang 1; Zhao WeiTao 2
	2010
发表期刊	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
ISSN	1674-7348
卷号	53 期号:11 页码:2113-2124
摘要	This paper analyzes the influence of multi-defects including the initial distortions, welding residual stresses, cracks and local dents on the ultimate strength of the plate element, and has worked out expressions of reliability calculation and sensitivity analysis of the plate element. Reliability analysis is made for the system with multi-defects plate elements. Failure mechanism, failure paths and the calculating approach to global reliability index are also worked out. After plate elements with multi-defects fail, the formula of reverse node forces which affect the residual structure is deduced, so are the sensitivity expressions of the system reliability index. This ensures calculating accuracy and rationality for reliability analysis, and makes it convenient to find weakness plate elements which affect the reliability of the structure system. Finally, for the validity of the approach proposed, we take the numerical example of a ship cabin to compare and contrast the reliability and the sensitivity analysis of the structure system with multi-defects with those of the structure system with no defects. The approach has implications for the structure design, rational maintenance and renewing strategy.
其他摘要	This paper analyzes the influence of multi-defects including the initial distortions,welding residual stresses,cracks and local dents on the ultimate strength of the plate element,and has worked out expressions of reliability calculation and sensitivity analysis of the plate element.Reliability analysis is made for the system with multi-defects plate elements.Failure mechanism, failure paths and the calculating approach to global reliability index are also worked out.After plate elements with multi-defects fail,the formula of reverse node forces which affect the residual structure is deduced,so are the sensitivity expressions of the system reliability index.This ensures calculating accuracy and rationality for reliability analysis,and makes it convenient to find weakness plate elements which affect the reliability of the structure system.Finally,for the validity of the approach proposed,we take the numerical example of a ship cabin to compare and contrast the reliability and the sensitivity analysis of the structure system with multi-defects with those of the structure system with no defects.The approach has implications for the structure design,rational maintenance and renewing strategy
关键词	ULTIMATE COMPRESSIVE STRENGTH initial distortions welding residual stresses cracks and local defects ultimate strength reverse node forces sensitivity expression reliability analysis
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:4112880
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/157436
专题	中国科学院金属研究所
作者单位	1.Harbin Engn University, Sch Aerosp & Civil Engn, Harbin 150001, Peoples R China 2.中国科学院金属研究所
推荐引用方式 GB/T 7714	An Hai,An WeiGang,Zhao WeiTao. Reliability analysis of ship structure system with multi-defects[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2010,53(11):2113-2124.
APA	An Hai,An WeiGang,&Zhao WeiTao.(2010).Reliability analysis of ship structure system with multi-defects.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,53(11),2113-2124.
MLA	An Hai,et al."Reliability analysis of ship structure system with multi-defects".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 53.11(2010):2113-2124.