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Experiment study of hydroelasto-buckling ship model in a single wave

机译：波浪中水弹屈曲船模型的实验研究

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摘要

A single wave of extreme height can damage ship structures in the ocean by generating buckling midship, thus destabilizing the ship girder and causing rupture. The probability of such an extreme wave is low in reality. On the one hand, it is very costly to recreate a real ship test for the study of extreme wave conditions. On the other hand, it is difficult to carry out tests on a scale model in tank waves, because such waves are too small to damage the ship model. In this paper, a hydroelasto-buckling experiment is performed on a ship model to study the dynamic ultimate strength of the ship and dynamic course of collapse of the structure. Thus far, no method of simulation has been proposed to study this problem because the dynamic ultimate strength of the ship involves strong coupling between the nonlinearity in the ship structure and waves. Here, a hydroelasto-buckling ship model is first designed, and a test programme is determined. A buckling hinge that can collapse under the load of the tank wave is used to connect two ship girders with a hinge joint. Then, a number of single tank waves are generated by changing their wave patterns to simulate an extreme ocean wave. The dynamic rotation angle, bottom water press and acceleration at midship are measured in the experiment. Importantly, the relationship between structural response and wave patterns is analyzed. The structural response involves encountering the VBM/rotation deformation induced by the wave load and whipping the VBM/rotation deformation induced by natural structural oscillations. It is found that the ultimate strength of the ship girder can be generated by both encountering waves and the structural flutter response caused by changing wave height. Lastly, the midship water pressure and acceleration are also analyzed to discuss the influence of a large deformation of the ship structure on the fluid load. Some conclusions are presented in the paper.
机译：极高的单个波浪会通过产生弯曲的中船来破坏海洋中的船舶结构，从而破坏船梁的稳定性并引起破裂。实际上，发生这种极端波动的可能性很小。一方面，为研究极端波浪条件而重建真实的船舶测试非常昂贵。另一方面，难以在罐波中对比例模型进行测试，因为这样的波太小而不会损坏船模。在本文中，对船舶模型进行了水弹屈曲实验，以研究船舶的动态极限强度和结构的倒塌动态过程。到目前为止，由于船舶的动态极限强度涉及船舶结构的非线性与波浪之间的强耦合，因此尚未提出任何模拟方法来研究该问题。在这里，首先设计了水弹屈曲船模型，并确定了测试程序。可以在坦克波的载荷下塌陷的屈曲铰链用于通过铰链接头连接两个船梁。然后，通过更改其单个波型来模拟极端的海浪，从而生成许多单个的坦克波。在实验中测量了动态旋转角度，底部水压和船中加速度。重要的是，分析了结构响应和波型之间的关系。结构响应包括遇到波浪载荷引起的VBM /旋转变形和搅打自然结构振动引起的VBM /旋转变形。结果发现，船梁的极限强度既可以通过遇到波浪，也可以通过改变波浪高度引起的结构颤振响应而产生。最后，还对船中水压力和加速度进行了分析，以讨论船体结构大变形对流体载荷的影响。本文提出了一些结论。

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  • 来源
    《Ocean Engineering》 |2017年第15期|102-114|共13页
  • 作者

    Liu Weiqin; Song Xuemin; Pei Zhiyong; Li Ye;

  • 作者单位

    Wuhan Univ Technol, Sch Transportat, Dept Navel Architecture Ocean & Struct Engn, Wuhan, Hubei, Peoples R China;

    Wuhan Univ Technol, Sch Transportat, Dept Navel Architecture Ocean & Struct Engn, Wuhan, Hubei, Peoples R China;

    Wuhan Univ Technol, Sch Transportat, Dept Navel Architecture Ocean & Struct Engn, Wuhan, Hubei, Peoples R China;

    Shanghai Jiao Tong Univ, Collaborat Innovat Ctr Adv Ship & Deep Sea Explor, State Key Lab Ocean Engn, Shanghai, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Hydroelasto-buckling; Buckling hinge; High-freqency; Encountering; Rotation; VBM; Hydrodynamic press; Acceleration;

    机译：水力弹性屈曲;屈曲铰链;高频;碰碰;旋转;VBM;水压机;加速;

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