Study on coupled dynamics of ship and flooding water based on experimental and SPH methods
Study on coupled dynamics of ship and flooding water based on experimental and SPH methods
复制标题
基于实验和SPH方法的船舶与进水耦合动力学研究
DOI：
10.1063/1.4986004
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发表时间：
2017
影响因子：
4.6
通讯作者：
Ming F R
中科院分区：
文献类型：
--
作者：
Cheng H;Zhang A M;Ming F R
本文对破损船舶浸水过程中的流体动力学进行了数值模拟和实验研究。注意力集中在流体流动特性和流体-结构相互作用。建立了一种改进边界处理的光滑粒子流体动力学（SPH）方法，该方法能够有效地捕捉流动行为。计算结果与实验结果吻合较好。基于SPH方法，对破损船舶在不同开舱尺寸、开舱位置和开舱数量下的浸水过程进行了数值模拟。此外，还考虑了波浪的影响。对流体行为进行了详细的描述和分析。研究发现，在进水的第一阶段，形成了一个大速度的入流射流，显着影响的内部流动和船舶响应。在渐进淹没阶段，晃荡，破碎的自由表面，波浪破碎，旋涡脱落，这是与船舶运动相耦合的观察。此外，对破损船舶的运动规律也给出了一些相关的结论。本文对破损船舶浸水过程中的流体动力学进行了数值模拟和实验研究。注意力集中在流体流动特性和流体-结构相互作用。建立了一种改进边界处理的光滑粒子流体动力学（SPH）方法，该方法能够有效地捕捉流动行为。计算结果与实验结果吻合较好。基于SPH方法，对破损船舶在不同开舱尺寸、开舱位置和开舱数量下的浸水过程进行了数值模拟。此外，还考虑了波浪的影响。对流体行为进行了详细的描述和分析。研究发现，在进水的第一阶段，形成了一个大速度的入流射流，显着影响的内部流动和船舶响应。在渐进淹没阶段，晃荡，破碎的自由表面，波浪破碎，涡...
The present paper studies the fluid dynamics during the flooding of a damaged ship numerically and experimentally. Attention is focused on the fluid flow characteristics and the fluid-structure interactions. The Smoothed Particle Hydrodynamics (SPH) method with an improved boundary treatment is established, which is able to capture the flow behaviors effectively. Fairly good agreement is obtained between the computational and experimental results. Based on the SPH method, the simulations are carried out for the flooding of a damaged ship with different opening sizes, opening positions, and numbers of the flooding cabins. Besides, the effects of the wave are also taken into account. The fluid behaviors are described and analyzed in detail. It is found that, during the first phase of flooding, an inflow jet with a large velocity is formed, significantly influencing the inner flows and the ship responses. During the progressive flooding phase, sloshing, crushing of the free surface, wave breaking, and vortex shedding are observed which are coupled with the ship motions. In addition, some relevant conclusions are enclosed for the motion laws of the damaged ship. This work provides physical insight into the flooding of the damaged ship, which is helpful to understand the coupled dynamics of the ship and flooding water.The present paper studies the fluid dynamics during the flooding of a damaged ship numerically and experimentally. Attention is focused on the fluid flow characteristics and the fluid-structure interactions. The Smoothed Particle Hydrodynamics (SPH) method with an improved boundary treatment is established, which is able to capture the flow behaviors effectively. Fairly good agreement is obtained between the computational and experimental results. Based on the SPH method, the simulations are carried out for the flooding of a damaged ship with different opening sizes, opening positions, and numbers of the flooding cabins. Besides, the effects of the wave are also taken into account. The fluid behaviors are described and analyzed in detail. It is found that, during the first phase of flooding, an inflow jet with a large velocity is formed, significantly influencing the inner flows and the ship responses. During the progressive flooding phase, sloshing, crushing of the free surface, wave breaking, and vortex...