NUMERICAL AIMULATION OF WAVE IMPACT LOAD ON HIGH SPEED SHIPS

高速船舶波浪冲击载荷数值模拟

• 批准号: 05650941
• 负责人: ARAI Makato
• 金额: $ 1.41万
• 依托单位: YOKOHAMA NATIONAL UNIVERSITY,FACULTY OF ENGINEERING
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650941/
• 关键词: WAVE IMPACT LOAD; SLAMMING; HIGH SPEED SHIPS; NUMERICAL SIMULATION; FINITE DIFFERENCE METHOD; 波浪情報; 数値波動水槽; 波浪荷重

In this study, a computing method for water impact of arbitrary shaped bodies is proposed. We use body-fitted coordinate system to model the arbitrary profile of the rigid body surface and the transient deformation of the free surface is solved by the fractional volume of fluid method. With this combination of the numerical techniques the rigid surface and the free surface boundary conditions are naturally treated at the intersection of both surfaces that improves remarkably the stability and accuracy of the numerical simulation.For the purpose of verifying the present computing method, classical problems of water impact of wedges and circular cylinders are studied. Moreover, water impacts of actual ship bow sections are simulated to illustrate the applicability of the present computing method to practical ship design problems. In these basic studies, we considered the cases in which the body enters an initially calm water surface with a constant velocity. The results of the simulations are examined against the existing analytical theories and published experimental data.Numerical wave generation technique is also studied for future research on the slamming of high speed vessels in realistic sea ways.

本文提出了一种任意形状物体水冲击的计算方法。采用贴体坐标系模拟任意形状的刚体表面，用流体分数体积法求解自由表面的瞬态变形。这种数值方法的结合，使刚性表面和自由表面边界条件在两表面相交处得到自然处理，显著提高了数值模拟的稳定性和精度。为了验证本文的计算方法，对经典的水冲击问题进行了研究。此外，模拟实际船舶船首剖面的水冲击，以说明本计算方法的适用性，实际船舶设计问题。在这些基础研究中，我们考虑了物体以恒定速度进入初始平静水面的情况。通过与已有的分析理论和实验数据的对比，对数值模拟结果进行了检验，并对数值波浪生成技术进行了研究，为高速船舶在实际航道中砰击问题的研究提供了参考。

项目成果

荒井誠ほか: "A Computing Method for the Analysis of Water Impact of Arbitrary Shaped Bodies" 日本造船学会論文集. 第176号. 233-240 (1994)

Makoto Arai 等人：“任意形状物体水影响分析的计算方法”，日本造船学会会刊，第 176. 233-240 号（1994 年）。

荒井誠ほか: "A Technique for Open Boundary Treatment in Numerical Wave Tanks" 日本造船学会論文集. 第173号. 45-50 (1993)

Makoto Arai 等人：“数值波池开放边界处理技术”，日本造船学会会刊，第 173. 45-50 号（1993 年）。

荒井誠ほか: "On the Reduction of Slamming Load by the Improvement of Cross Sectional Shapes of Ship Bows" The proceedings of TEAM‐TAIPEI′94. 83-98 (1994)

Makoto Arai 等人：“通过改进船首横截面形状来减少撞击载荷” TEAM-TAIPEI94 论文集（1994）。

M.Arai et al.: "A Technique for Open Boundary Treatment in Numerical Wave Tanks" 日本造船学会論文集. 第173号. 45-50 (1993)

M.Arai 等人：“数值波池开放边界处理技术”日本造船学会汇刊第 173. 45-50 号（1993 年）。

荒井誠ほか: "Wave Generation in 3D Numerical Wave Tanks" 日本造船学会論文集. 第174号. 253-259 (1993)

Makoto Arai 等人：“3D 数值波浪池中的波浪生成”，日本造船学会论文集，第 174. 253-259 号（1993 年）。