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Numerical modeling of the interaction between submerged floating tunnel and surface waves

机译：浸没浮隧道与表面波相互作用的数值模拟

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摘要

This paper presents a numerical model for analyzing the nonlinear interaction between the moored Submerged Floating Tunnel (SFT) and surface waves. The mechanics model of the moored floating body driven by wave forces is built, and an efficient mesh update method is employed to dynamically configure the computational meshes solving the Navier-Stokes equations for viscous and incompressible free surface flows with the volume of fluid (VOF) method. Two laboratory experiments are used for validating the numerical model in terms of surface elevations, motion responses and mooring forces of the SFT, indicating the proposed model is capable of simulating the dynamics of the moored floating body under the wave action. This hydrodynamic model is then utilized to simulate the wave-structure interaction of the prototype SFT designed for Funka Bay, Hokkaido located in Japan. A total of 49 cases are designed for the numerical simulation to investigate the characteristics of the wave-tunnel interaction for different hydrodynamic parameters, including wave height, wave period, immersion depth and buoyancy-weight ratio (BWR). The numerical experiments not only shed light on the mooring forces, as well as pitch, sway and heave responses of the SFT in different wave conditions, but also provide guidance for the choice of BWR in engineering design. A medium value of BWR is suggested to be suitable, which is useful for avoiding the happening of snap forces in mooring chains and preventing SFT from experiencing large movement under external forces in severe wave conditions. As the correlation between the motion responses and BWR is not merely linear or quadratic but parabolic with a peak value, the design of BWR should avoid the case where peak motion responses of SFT happen.
机译：本文介绍了分析停泊浸没浮隧（SFT）和表面波之间的非线性相互作用的数值模型。建立了由波力驱动的系泊浮体的机械模型，采用有效的网格更新方法动态配置求解粘性和不可压缩的自由表面流量的粘性和不可压缩表面流量的计算网格（VOF）方法。两个实验室实验用于在SFT的表面升高，运动响应和系泊力方面验证数值模型，表明所提出的模型能够模拟波浪动作下停泊浮体的动态。然后利用该流体动力学模型来模拟原型SFT的波浪结构互动，专为Funka Bay，北海道位于日本而设计。专为数值模拟而设计了49例，以研究不同流体动力学参数的波浪隧道相互作用的特性，包括波浪高，波周，浸没深度和浮力重量比（BWR）。数值实验不仅脱落在系泊力，以及SFT在不同波条件下的音高，摇摆和升降响应，而且还为工程设计中的BWR提供了指导。建议BWR的中等值是合适的，这对于避免在系泊链中的卡扣力发生并防止在严重波条件下的外力下发生大的运动。随着运动响应和BWR之间的相关性不仅仅是线性的或二次而是具有峰值的抛物线，BWR的设计应该避免SFT的峰值运动响应的情况。

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  • 来源
    《Ocean Engineering》 |2021年第15期|108494.1-108494.16|共16页
  • 作者

    Chen Xuebin; Chen Qin; Chen Zhiwu; Cai Shuqun; Zhuo Xianrong; Lv Jiangen;

  • 作者单位

    Zhongkai Univ Agr & Engn Coll Urban & Rural Construct Guangzhou 510225 Peoples R China;

    Northeastern Univ Dept Civil & Environm Engn Boston MA 02115 USA;

    Southern Marine Sci & Engn Guangdong Lab Guangzho Guangzhou 511458 Peoples R China|Chinese Acad Sci South China Sea Inst Oceanol State Key Lab Trop Oceanog Guangzhou 510301 Peoples R China;

    Southern Marine Sci & Engn Guangdong Lab Guangzho Guangzhou 511458 Peoples R China|Chinese Acad Sci South China Sea Inst Oceanol State Key Lab Trop Oceanog Guangzhou 510301 Peoples R China;

    Zhongkai Univ Agr & Engn Coll Urban & Rural Construct Guangzhou 510225 Peoples R China;

    Zhongkai Univ Agr & Engn Coll Urban & Rural Construct Guangzhou 510225 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Submerged floating tunnel; Motion response; Mooring force; BWR;

    机译：潜水浮隧道;运动响应;系泊力;BWR;

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