| 非完全淹没水平圆柱上波浪力特征的数值模拟 |
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| 引用本文： | 毛鸿飞,陈洪洲.非完全淹没水平圆柱上波浪力特征的数值模拟[J].水科学进展,2019,30(5):749-759. |
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| 作者姓名： | 毛鸿飞 陈洪洲 |
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| 作者单位： | 1.广东海洋大学海洋工程学院, 广东 湛江 524088; |
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| 基金项目： | 国家自然科学基金资助项目（51809039）；广东海洋大学科研启动费资助项目（R19024） |
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| 摘 要： | 为研究大波幅波浪作用下，非完全淹没水平圆柱所受波浪力的特征，基于黏性流理论采用有限体积法建立两相流数值波浪水槽模型，对不同波幅和圆柱垂向位置下非完全淹没水平圆柱所受波浪力进行了数值计算，并对波浪力和冲击力的特征进行了分析，讨论了冲击力与冲击速度的关系，结合经验计算公式拟合得到了冲击力系数。结果表明:波浪力的大小受波幅和圆柱垂向位置的影响比较显著，其影响机理与波浪场流体运动特性相关；冲击力的大小与冲击速度密切相关，而垂向冲击力在波浪力中起主导作用时，对应的最小预测冲击速度受圆柱垂向位置影响并不显著；不同圆柱垂向位置下冲击力系数随着波幅增大由分散性较强逐渐趋于集中。
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| 关 键 词： | 水平圆柱 波浪力 冲击力 非完全淹没 数值模拟 |
| 收稿时间： | 2019-04-01 |
Numerical simulation on characteristics of wave forces on an incompletely submerged horizontal circular cylinder |
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| MAO Hongfei,CHEN Hongzhou.Numerical simulation on characteristics of wave forces on an incompletely submerged horizontal circular cylinder[J].Advances in Water Science,2019,30(5):749-759. |
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| Authors: | MAO Hongfei CHEN Hongzhou |
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| Affiliation: | 1.College of Ocean Engineering, Guangdong Ocean University, Zhanjiang 524088, China;2.College of Civil Engineering and Architecture, Northeast Electric Power University, Jilin 132012, China |
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| Abstract: | This study investigated the wave forces on an incompletely submerged horizontal circular cylinder under large-amplitude wave action using a viscous fluid numerical wave tank model based on the finite volume method. By analysing the characteristics of the wave and slamming forces on the circular cylinder,the influences of wave amplitude and vertical position of the cylinder on the wave forces were investigated,and the relationships between the slamming forces and velocity were discussed. The slamming coefficients were based on a data fitting method. The results showed that the wave forces were significantly influenced by wave amplitude and vertical position of the cylinder. The mechanism can be explained by the features of the fluid motion in the wave field. Although the slamming forces were closely related to the slamming velocity,the influence of the vertical position of the cylinder on the minimum predicted slamming velocity for the situation,in which the slamming forces play a dominant role in the wave forces,were unremarkable. As the wave amplitude increases,the distribution of the slamming coefficients for different vertical positions of the cylinder changes from dispersed towards focused. |
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| Keywords: | horizontal circular cylinder wave force slamming force incompletely submerged numerical simulation |
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