| 内波对水下浮体运动的影响研究 |
| Influence of Internal Solitary Wave on the Motion of Submerged Floating Body |
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| DOI：10.3969/j.issn.1003-2029.2026.03.002 |
| 中文关键词: 内孤立波 水下浮体 垂向受力 运动响应 南海 |
| 英文关键词:internal solitary wave submerged floating body vertical force dynamic response South China Sea |
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| 中文摘要: |
| 潜航器等水下浮体已成为深海探测的重要设备平台，如遇海洋内波将对水下浮体的安全性构成巨大威胁。本文以南海区域内孤立波的实际观测值为参数，选取两层流体产生的内孤立波KdV (Korteweg-de Vries)方程的理论解，建立内波流场数值环境，应用Morison公式求解水下浮体在内孤立波作用下的垂向受力情况时域模型和垂向运动响应的时域模型。结果表明:结构物受到的垂向力瞬时峰值最高可达104N，在水体中的垂直下沉深度最高可达200m。浮体在内孤立波的作用下，会受到短时间内剧烈变化的垂向作用力的影响，浮体也会因此发生剧烈的下沉或上浮，威胁其结构安全。本文可为水下浮体及潜航器在复杂内波环境下的设计、控制与防护提供理论依据，对保障深海装备的运行安全与提升抗内波扰动性能具有重要工程意义。 |
| 英文摘要: |
| Submerged floating body such as underwater vehicle has become the most important platform for deep sea detection, while the submerged floating body may be certainly threatened if it encounters the internal solitary wave. In this paper, the time domain models for the vertical forces and vertical motion of submerged floating body are established and solved by Morison equation, in which the parameters of the internal solitary wave observed in South China Sea are used, the theoretical solution of KdV equation of internal solitary wave induced by two layer fluid is selected to build the numerical environment of the internal wave fluid field. Results indicate that the transient peak value of vertical force on the structure can reach 104 N, while the vertical sinking distance can be 200 m. The submerged floating body would experience dramatic vertical floating or sinking under the severe vertical forces within a short time induced by internal solitary wave, which may threaten the security of the structure. This study provides a theoretical basis for the design, control, and protection of submerged floating bodies and underwater vehicles operating in complex internal wave environments. It holds significant engineering importance for ensuring the operational safety of deep-sea equipment and enhancing its resistance to disturbances induced by internal waves. |
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