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Impact of narrow plates on broader liquid bodies

机译:窄板对更宽液体的影响

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Analytical leading-order solutions are given for liquid bodies that hit a rigid plate in impulsive incompressible impact. The liquid bodies are broader than the impacting plate which causes a mixed boundary condition. The initial velocity field, the corresponding pressure impulse field, and the associated virtual masses are calculated. The following liquid body geometries are studied: 2D rectangles hit symmetrically by the plate, including a case with impermeable sidewalls, asymmetric hit of a 2D rectangle, and symmetric hit of a 3D rectangular box, and of a circular cylinder. A plausible estimate for liquid impact is that a marine structure can never be struck by a greater force impulse than the momentum of incoming liquid perpendicular to its own cross section. By comparing the virtual mass with the total projected fluid mass above the plate for the different liquid body geometries, it is found that the estimate holds for all the computed cases.
机译:分析领先阶液溶液用于撞击刚性板的液体,脉冲不可压缩的冲击。 液体比造成混合边界条件的冲击板更宽。 计算初始速度场,相应的压力脉冲场和相关的虚拟肿块。 研究了以下液体几何形状:由板对称地击中的2D矩形,包括具有不透水侧壁的壳体,2D矩形的不对称击中,以及3D矩形盒的对称击中,以及圆柱形的对称击中。 对液体影响的合理估计是船舶结构永远不会被比垂直于其自身横截面的进入液体的动量更大的力脉冲。 通过将虚拟物质与不同液体几何形状上方的板上的总投影液体质量进行比较,发现估计为所有计算出的情况。

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