Abstract In this paper, the slamming pressure and load characteristics of a trimaran cross-section under various conditions were investigated by CFD (Computational Fluid Dynamics) simulations. The computation model was first validated against experimental results. After that, the simulation of different types of motion, i.e. free fall with different mass and entry velocity, entry with constant velocity and harmonic motion with different entry velocities were analysed. It was found that the characteristics of the dynamics during slamming strongly correlates to penetration depth, regardless of the types of entry. Distinguishing features during the wet-deck slam were observed for free fall motion under different conditions, including pressure drop under the main hull during wet-deck slam. The maximum acceleration would start to decrease after the mass has reached a certain value, and the second acceleration peak (corresponding to the wet-deck slam) would be smaller than the first one if the falling height is large enough.

中文翻译：

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不同工况下三体船撞击的研究

摘要 本文通过CFD（计算流体动力学）模拟研究了不同条件下三体船横截面的砰击压力和载荷特性。该计算模型首先根据实验结果进行验证。之后，分析了不同质量和进入速度的自由落体、等速进入和不同进入速度的谐波运动等不同类型运动的模拟。研究发现，无论进入的类型如何，砰击过程中的动力学特性都与穿透深度密切相关。在不同条件下观察到自由落体运动的湿甲板猛击过程中的显着特征，包括湿甲板猛击期间主船体下的压降。