| 船舶搁浅于台型礁石场景下双层底外底板骨材变形机理研究 |
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| 引用本文： | 于兆龙,胡志强,王革.船舶搁浅于台型礁石场景下双层底外底板骨材变形机理研究[J].工程力学,2014,31(9):28-36. |
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| 作者姓名： | 于兆龙 胡志强 王革 |
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| 作者单位： | 1.上海交通大学海洋工程国家重点实验室,上海 200240; |
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| 基金项目： | 大连理工大学工业装备结构分析国家重点实验室开放课题项目(GZ1214);美国船级社海洋工程中国研究中心项目 |
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| 摘 要： | 以典型船舶双层底结构中外底板上的骨材为研究对象,运用塑性力学解析理论推导和数值仿真技术,研究外底板上骨材在船舶搁浅于台型礁石场景下的结构损伤机理。研究中应用仿真计算方法获得骨材结构变形模态和能量耗散结果,在研究变形模态基础上建立外底板骨材塑性变形发展过程的数学模型。运用塑性力学理论获得骨材结构变形能和平均变形阻力的解析计算公式,并应用数值仿真结果进行验证。研究得到的外底板骨材变形阻力和变形能解析计算公式,对船舶双层底耐撞性结构设计和耐撞性能评估都具有一定的指导意义。
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| 关 键 词： | 船舶搁浅 外底板骨材 解析计算 数值仿真 结构变形能 搁浅力 |
| 收稿时间： | 2013-04-07 |
COLLAPSE MECHANISM ANALYSIS OF STIFFENERS ON THE OUTER BOTTOM PLATE IN A SHOAL GROUNDING ACCIDENT |
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| Affiliation: | 1.State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2.State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, China;3.ABS Greater China Division, Shanghai 200021, China |
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| Abstract: | The plastic theory and numerical simulation method are used to discuss the deformation patterns and collapse mechanisms of stiffeners on the outer bottom plate of a double bottom tanker in a shoal grounding scenario. Numerical simulation technique is used to calculate the deformation patterns and energy dissipation. A mathematical model of the progressively deformed stiffeners is built. With the employment of plastic theory, the analytical expressions of the energy dissipation and the mean resistances are obtained. The analytical results were compared and verified with the numerical simulation results. These analytical expressions can be incorporated to assess the crashworthiness of a ship double bottom during its design phase. |
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