考虑腐蚀与疲劳损伤的船体总纵极限强度与可靠性分析  

HULL ULTIMATE STRENGTH AND RELIABILITY ANALYSIS CONSIDERING CORROSION AND FATIGUE

作　　者：魏东[1] 张圣坤[1] 周继胜[1] 

机构地区：[1]上海交通大学

出　　处：《中国造船》1999年第4期43-50,共8页Shipbuilding of China

摘　　要：本文定量考虑了腐蚀与疲劳两类损伤对船体结构随时间变化的情况，并建立了船体总纵极限强度与时变可靠性的计算方法。对一条实船的分析说明，腐蚀和疲劳损伤虽然短时间内的破坏并不显著，但积累到一定程度，对船体结构的影响相当大。采用可靠性评估的方法，对船体总纵强度的安全水平可作出合理的评价。Fatigue and corrosion are common damages in ship structures. The variation of ship structure with time due to the two damages is considered, then an analysis method of hull longitudinal ultimate strength and time variant reliability are discussed. The tank case study shows that in short time period fatigue and corrosion damages could be neglected, but the damages could affect ship strength obviously when they accumulate to some degree. Using reliability assessment method, we can obtain proper assessment of hull longitudinal strength safety level.

关 键 词：腐蚀 疲劳 极限强度 船舶 可靠性 

分 类 号：U661.43[交通运输工程—船舶及航道工程]