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A hybrid potential theory for predicting the motions of a moored ship induced by large-scaled tsunami

机译：混合势理论用于预测大规模海啸引起的停泊船舶的运动

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摘要

In our previous study, we proposed a practical numerical simulation method on moored ship motions induced by tsunami, which was attained by a connection between a tsunami profile by the tsunami simulation and a velocity potential around the ship. The velocity potential was derived from the tsunami profile, which was able to express and calculate not only the surface elevation and currents but also the exciting force of the ship simultaneously. In the previous method, the tsunami surface elevation was reproduced well, however the currents were not. In this paper, we investigate the difference between both the currents, and propose a hybrid potential theory to improve the accuracy on the connection. In this proposed method, simultaneous equations for several parameters to coincide with each other are newly established by considering an equivalent infinite long quay wall for substituting a pair of predominant incident and reflected tsunami waves for the original tsunami wave profile. It has been confirmed that the ship motions and the mooring loads are influenced by the evaluation method on the velocity potential calculated by the tsunami profile.
机译：在我们以前的研究中，我们提出了一种实用的海啸引起的系泊船舶运动的数值模拟方法，该方法是通过海啸模拟的海啸剖面与船周围的速度势之间的联系实现的。速度势是从海啸剖面中得出的，海啸剖面不仅可以表示和计算表面高度和洋流，还可以同时计算和计算船舶的激振力。在以前的方法中，海啸表面的高程被很好地再现，但是洋流却没有。在本文中，我们研究了两种电流之间的差异，并提出了一种混合电势理论来提高连接的精度。在该方法中，通过考虑等效的无限长码头壁，用一对主要入射和反射海啸波替代原始海啸波轮廓，建立了多个参数相互一致的联立方程。已经证实，评估方法对海啸剖面计算出的速度潜能影响了船舶的运动和系泊载荷。

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