赵石峰, 陈廷国, 易 平, 赵雪峰. 深水港码头轻型导管架结构在船舶撞击下的疲劳分析[J]. 工程力学, 2010, 27(8): 251-256.
引用本文: 赵石峰, 陈廷国, 易 平, 赵雪峰. 深水港码头轻型导管架结构在船舶撞击下的疲劳分析[J]. 工程力学, 2010, 27(8): 251-256.
ZHAO Shi-feng, CHEN Ting-guo, YI Ping, ZHAO Xue-feng. FATIGUE ANALYSIS OF JACKET PLATFORM SUBJECTED TO SHIP’S IMPACT IN DEEPWATER PORT[J]. Engineering Mechanics, 2010, 27(8): 251-256.
Citation: ZHAO Shi-feng, CHEN Ting-guo, YI Ping, ZHAO Xue-feng. FATIGUE ANALYSIS OF JACKET PLATFORM SUBJECTED TO SHIP’S IMPACT IN DEEPWATER PORT[J]. Engineering Mechanics, 2010, 27(8): 251-256.

深水港码头轻型导管架结构在船舶撞击下的疲劳分析

FATIGUE ANALYSIS OF JACKET PLATFORM SUBJECTED TO SHIP’S IMPACT IN DEEPWATER PORT

  • 摘要: 结合大连新港新建30万吨级(兼靠45万吨)进口原油码头工程,研究离岸深水港码头轻型导管架结构在系泊船舶撞击下的疲劳损伤。采用通用有限元程序ANSYS计算船舶撞击作用下导管架平台的动力反应,得到结构构件的名义应力,乘以相应的应力集中系数,得到管节点热点应力的时程曲线。分别应用美国石油学会(API)规范、挪威船级社(DNV)规范和中国船级社(ZC)规范中相应的S-N曲线对船舶撞击作用下的疲劳损伤进行了计算。计算结果表明,对应用于离岸深水港码头的导管架结构,由船舶撞击平台所引起的疲劳损伤较大,不能忽略,若只考虑波浪荷载引起的疲劳损伤会导致过高地估计结构的疲劳寿命。结果还表明,按API规范与ZC规范计算得到的疲劳损伤基本一致,按DNV规范计算得到的疲劳损伤较其他两种规范偏大。

     

    Abstract: Combining with the 300 thousand DWT crude oil terminal projects in Dalian new port, the fatigue damage of jacket platform subjected to ship’s impact is researched. The structural dynamic response due to ship’s impact is calculated using the finite element software ANSYS. The hot stress in the joints is calculated by multiplying the corresponding stress concentration factors to members nominal stress against time. Different S-N curves in the codes of API, DNV, ZC are respectively used to calculate the fatigue damage of the joints under ship’s impact. The results show that the fatigue damage caused by ship’s impact can not be neglected when the jacket platform is applied in a harbor, and if only the wave loading is considered it would result in overestimating the fatigue life of jacket structures. The fatigue damage calculated by the codes of API and ZC is almost the same, the fatigue damage calculated by the code of DNV is larger than that of two other codes.

     

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