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STRUCTURAL RESPONSE CHARACTERISTICS OF SHIPS INVOLVED IN COLLISION ACCIDENT

机译:碰撞事故中船舶的结构响应特性

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Collision accidents continue to occur in spite of continuous efforts to prevent them. With the increasing demand for safety of lives at sea and protection of the environment, it is essential to examine very closely all aspects connected with collision between ships. The purpose of this study is to investigate the structural response characteristics of the struck ship involved in collision accident using numerical methods. In the previous study, some authors of the present study produced probabilistic ship-ship collision scenarios using an innovative method using various collision parameters that have been treated as random variables. These scenarios are used in the present study in which both striking and struck ships involved in accident are suggested to be double hull tankers. Nowadays, finite element method is often used for solving non-linear structure problems. Generally, explicit dynamics finite element method is preferred for collision analysis. In this regard, the randomly selected collision scenarios are analysed using LS-DYNA/MCOL program. The structural performance against collision loads based on design criteria is evaluated taking into account structural damage amount. Some useful design guidelines are developed based on the results. As an illustrative example, a Suezmax class double hull oil tanker is considered for the purpose of the present study in terms of energy absorption capability and the extents of damages as the results of FE simulations.
机译:尽管不断努力防止发生碰撞事故,但仍在继续。随着人们对海上人命安全和环境保护的需求不断增长,必须密切检查与船舶碰撞有关的所有方面。这项研究的目的是使用数值方法研究发生碰撞事故的撞船的结构响应特性。在先前的研究中,本研究的一些作者使用一种创新的方法,使用了已被视为随机变量的各种碰撞参数,产生了概率性的船舶碰撞情况。在本研究中使用了这些情景,其中涉及事故的打击船和撞船均被建议为双壳油轮。如今,有限元法通常用于解决非线性结构问题。通常,显式动力学有限元方法是进行碰撞分析的首选方法。在这方面,使用LS-DYNA / MCOL程序分析随机选择的碰撞场景。根据设计标准评估抵抗碰撞载荷的结构性能,并考虑结构损坏量。根据结果​​制定了一些有用的设计准则。作为一个说明性示例,就本研究的目的而言,考虑到Suezmax级双壳油轮在能量吸收能力和有限元模拟结果的损害范围方面。

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