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首页> 外文期刊>Philosophical transactions of the Royal Society. Mathematical, physical, and engineering sciences >Hydroelastic behaviour of a structure exposed to an underwater explosion
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Hydroelastic behaviour of a structure exposed to an underwater explosion

机译：暴露于水下爆炸的结构的水弹性行为

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The hydroelastic interaction between an underwater explosion and an elastic plate is investigated numerically through a domain-decomposition strategy. The three-dimensional features of the problem require a large computational effort, which is reduced through a weak coupling between a one-dimensional radial blast solver, which resolves the blast evolution far from the boundaries, and a three-dimensional compressible flow solver used where the interactions between the compression wave and the boundaries take place and the flow becomes three-dimensional. The three-dimensional flow solver at the boundaries is directly coupled with a modal structural solver that models the response of the solid boundaries like elastic plates. This enables one to simulate the fluid-structure interaction as a strong coupling, in order to capture hydroelastic effects. The method has been applied to the experimental case of Hung et al. (2005 Int. J. Impact Eng. 31, 151-168 (doi: 10.1016/j.ijimpeng.2003.10.039)) with explosion and structure sufficiently far from other boundaries and successfully validated in terms of the evolution of the acceleration induced on the plate. It was also used to investigate the interaction of an underwater explosion with the bottom of a close-by ship modelled as an orthotropic plate. In the application, the acoustic phase of the fluid-structure interaction is examined, highlighting the need of the fluid-structure coupling to capture correctly the possible inception of cavitation.
机译：通过区域分解策略，对水下爆炸与弹性板之间的水弹相互作用进行了数值研究。问题的三维特征需要大量的计算工作，而通过一维径向爆炸求解器（可以解决爆炸演化远离边界的问题）与三维可压缩流求解器之间的弱耦合，可以减少此工作量压缩波与边界之间发生相互作用，流动变成三维。边界处的三维流动求解器直接与模态结构求解器耦合，该模态结构求解器对诸如弹性板之类的固体边界的响应进行建模。这使人们可以将流体-结构相互作用模拟为强耦合，以便捕获水弹性效应。该方法已应用于Hung等的实验情况。 （2005 Int。J. Impact Eng。31，151-168（doi：10.1016 / j.ijimpeng.2003.10.039））爆炸和结构距离其他边界足够远，并且成功验证了在碟子。它还用于研究水下爆炸与模型为正交异性板的近舰底部之间的相互作用。在该应用中，检查了流固耦合的声相，突出了流固耦合的需要，以正确捕获可能的气蚀现象。

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