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谷梦梦, 魏岗, 邓冰, 杜辉, 武军林. 过山脊内孤立波演变及其对细长潜体的作用力特性[J]. 力学学报, 2017, 49(6): 1260-1271. DOI: 10.6052/0459-1879-16-322
引用本文: 谷梦梦, 魏岗, 邓冰, 杜辉, 武军林. 过山脊内孤立波演变及其对细长潜体的作用力特性[J]. 力学学报, 2017, 49(6): 1260-1271. DOI: 10.6052/0459-1879-16-322
Gu Mengmeng, Wei Gang, Deng Bing, Du Hui, Wu Junlin. EXPERIMENTAL INVESTIGATION ON THE EVOLUTION OF INTERNAL SOLITARY WAVE OVER A RIDGE AND ITS ACTING FORCES ON A SUBMERGED SLENDER BODY[J]. Chinese Journal of Theoretical and Applied Mechanics, 2017, 49(6): 1260-1271. DOI: 10.6052/0459-1879-16-322
Citation: Gu Mengmeng, Wei Gang, Deng Bing, Du Hui, Wu Junlin. EXPERIMENTAL INVESTIGATION ON THE EVOLUTION OF INTERNAL SOLITARY WAVE OVER A RIDGE AND ITS ACTING FORCES ON A SUBMERGED SLENDER BODY[J]. Chinese Journal of Theoretical and Applied Mechanics, 2017, 49(6): 1260-1271. DOI: 10.6052/0459-1879-16-322

过山脊内孤立波演变及其对细长潜体的作用力特性

EXPERIMENTAL INVESTIGATION ON THE EVOLUTION OF INTERNAL SOLITARY WAVE OVER A RIDGE AND ITS ACTING FORCES ON A SUBMERGED SLENDER BODY

  • 摘要: 内孤立波沿山脊地形传播过程中的结构变化使得影响海洋结构物及水下航行器安全的不确定因素增加,用大型重力式分层流试验水槽系统研究内孤立波过山脊地形及其对细长潜体作用力特性,可有效提高对其危害性机理的认识.为此,利用电导率探头阵列,结合染色标识方法,测量内孤立波演变特性,同时利用三分量传感器测量水下细长体模型受力特性.研究结果表明:山脊地形显著改变下凹型内孤立波结构,表现为坡前波幅增大,坡顶背风波面抬升,坡后波长变长;内波结构变化直接影响细长体受力特性,表现为坡前向下作用力明显增强,坡顶向上作用力突显,坡后作用力持续时间变长;细长体受力特性变化影响其运动趋势,坡前下沉运动增强、朝山脊方向纵荡运动显著.

     

    Abstract: The configuration of internal solitary wave (ISW) over a ridge terrain will largely increase the uncertain factors threatening the safety for marine architecture and submerged vehicle. Laboratory experiments are conducted to examine an ISW propagating over a ridge terrain and its interaction with a submerged slender body in a large-type gravity stratified fluid tank. The evolution characteristics of the ISW is measured by using multi-channel conductivity-probe arrays and dyeing identification method, and its action on the body exerted by the ISW is measured by a set of three-component force sensor. The experimental results have shown that when an ISW of depress propagates over a ridge terrain its wave configuration will be changed significantly, including that its amplitude will increase on the windward side of ridge, its lee side will be up at the top of ridge and its wavelength will be longer on the leeward side of ridge. Furthermore the configuration change of the ISW will affect obviously the characteristics of the action on a slender body, including that the downward force becomes larger distinctly on the windward side of ridge, the upward force is more significant at the top of ridge and the effective time of the action on the body becomes longer at the leeward side of ridge. Therefore, the body movement trend can be judged roughly based on the force behaviors, i.e. the largest sinking will happen on the windward side of ridge and the stronger surging towards the direction of ridge will do on the windward side of ridge.

     

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