| LNG船疲劳强度评估及低温影响的讨论 |
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| 引用本文： | 唐建鹏,刘俊,庄志鹏.LNG船疲劳强度评估及低温影响的讨论[J].武汉造船,2009(4):20-23. |
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| 作者姓名： | 唐建鹏 刘俊 庄志鹏 |
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| 作者单位： | 上海交通大学船舶海洋与建筑工程学院,上海200240 |
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| 摘 要： | 以某LNG船为研究对象，建立三舱段有限元模型，并根据美国船级社薄膜型LNG船体结构疲劳强度指南，基于SN曲线法的疲劳积累损伤原理，分别采用名义应力和热点应力法，对船体典型节点进行疲劳强度评估，同时对计算结果进行分析；讨论低温下材料性能改变对节点疲劳寿命评估的影响。研究表明，采用常温下SN曲线进行LNG船疲劳强度评估是合适的。
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| 关 键 词： | LNG船 名义应力法 热点应力法 疲劳强度 低温 |
Fatigue Strength Assessment of LNG Vessel and Discussion on the Influence of Low Temperature |
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| TANG Jian-peng,LIU Jun,ZHUANG Zhi-peng.Fatigue Strength Assessment of LNG Vessel and Discussion on the Influence of Low Temperature[J].Wuhan Shipbuilding,2009(4):20-23. |
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| Authors: | TANG Jian-peng LIU Jun ZHUANG Zhi-peng |
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| Institution: | (School of Naval Architecture Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200030, China) |
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| Abstract: | According to the Guide for Building and Classing Membrane Tank LNG Vessels of ABS, the finite element model had been built and the fatigue strength assessment of a LNG vessel had been carried out with nominal stress method and hot spot stress method based on the fatigue accumulating damage concept of S-N curve approach. Additionally, the influence of low temperature on the fatigue life was discussed. The outcome showed that it is reasonable to use S-N curve obtained under normal temperature in Fatigue Strength Assessment of LNG vessel. |
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| Keywords: | LNG ship nominal stress method hot spot stress method fatigue strength low temperature |
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