| 二维楔形物体的自由撞水分析 |
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| 引用本文： | 尹莉,钱勤.二维楔形物体的自由撞水分析[J].大连海事大学学报(自然科学版),2010(1). |
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| 作者姓名： | 尹莉 钱勤 |
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| 作者单位： | 华中科技大学土木工程与力学学院; |
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| 基金项目： | 国家自然科学基金资助项目(10572051) |
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| 摘 要： | 为分析物体在撞水过程中由于加速度急剧变化而对其运行有效性和安全性的影响,基于速度势理论,采用任意的Lagrangian-Eulerian(ALE)边界元法分析二维楔形体的自由撞水,并预设自由液面网格点的运动轨迹平行于结构面.对一斜升角楔形体自由撞水实验结果与数值计算结果的比较验证了该计算方法的可靠性,同时,获得了液固耦合面上的无量纲水动压力分布随时间变化规律.另外,参数比较研究发现,斜升角或质量减小时,加速度变化速度加快,加速度峰值降低,达到峰值所需的时间缩短,相同参数增量下的峰值变化幅度增大;而初速度增大时,加速度-时间历程具有相同的变化趋势.
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| 关 键 词： | 二维楔形体 撞水 任意Lagrangian-Eulerian（ALE） 边界元法 |
Free water impacting analysis of a two-dimensional wedge |
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| YIN Li,QIAN Qin.Free water impacting analysis of a two-dimensional wedge[J].Journal of Dalian Maritime University,2010(1). |
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| Authors: | YIN Li QIAN Qin |
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| Institution: | School of Civil Engineering & Mechanics;Huazhong University of Science and Technology;Wuhan 430074;China |
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| Abstract: | To analyze the effects of the body on its efficiency and safety of running with rapid change of acceleration during water impact,a simulation of 2D wedge with deadrise angle freefall into water was developed based on the potential flow theory,and impacting performance was analyzed with arbitrary Lagrangian-Eulerian(ALE) boundary element method for which the trajectories of free surface's nodes parallel to structural surfaces were presupposed.Comparing results between numerical calculation and experiments ve... |
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| Keywords: | 2D wedge water impacting arbitrary Lagrangian-Eulerian(ALE) boundary element method |
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