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首页> 外文期刊>Ocean Engineering >Comparative study of hydrodynamic performances of breakwaters with double-layered perforated walls attached to ring-shaped very large floating structures
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Comparative study of hydrodynamic performances of breakwaters with double-layered perforated walls attached to ring-shaped very large floating structures

机译：双层多孔壁附着在环形超大型浮式结构上的防波堤的水动力性能比较研究

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摘要

A very large ring-shaped structure composed of spar-type modules is proposed as an intermediate base for supporting deepwater oil exploitation. One of the features of the structure is the attachment of a double-layered perforated-wall breakwater, which reduces the wave energy inside the harbour. To establish the hydrodynamics of the complex structure, the characteristics of the breakwater were experimentally investigated using six different configurations. The transfer functions of the waves inside the harbour were found to have multiple peaks, which were produced by the interaction of the transmitted waves with the diffracted waves. The incident wave amplitude was also observed to significantly affect the wave energy dissipation of the breakwater for short waves, whereas the effect was small for long waves. The wave loss coefficients, wave run-up, mooring force, and surge motion were all observed to increase significantly with decreasing porosity. However, the vertical motions were quite small owing to the low natural frequencies, and they were negligibly affected by the porosity. By quantitative estimation of the effects of the porosity, it was found that the low-frequency horizontal motion, mooring force, and wave attenuation were the critical factors to be considered in the design of a breakwater attached to floating structures. (C) 2015 Elsevier Ltd. All rights reserved.
机译：提出了一种由翼梁型模块组成的非常大的环形结构作为支撑深水石油开采的中间基础。该结构的特征之一是附​​有双层多孔壁防波堤，可减少港口内的波浪能。为了建立复杂结构的流体动力学特性，使用六种不同的配置对防波堤的特性进行了实验研究。发现港口内的波的传递函数具有多个峰，这是由透射波与衍射波的相互作用产生的。对于短波，还观察到入射波幅度会显着影响防波堤的波能耗散，而对于长波，影响很小。随着孔隙率的降低，波损系数，波上升，系泊力和浪涌运动都显着增加。然而，由于固有频率低，垂直运动非常小，并且其受孔隙率的影响可以忽略不计。通过对孔隙度影响的定量估计，发现低频水平运动，系泊力和波浪衰减是设计附着在浮动结构上的防波堤时要考虑的关键因素。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Ocean Engineering》 |2016年第1期|279-291|共13页
  • 作者

    Xiao Longfei; Kou Yufeng; Tao Longbin; Yang Lijun;

  • 作者单位

    Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China|Newcastle Univ, Sch Marine Sci & Technol, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England;

    Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Very large floating structure; Breakwater; Wave attenuation; Motion response; Mooring force;

    机译：很大的浮动结构;防洪;波衰减;运动响应;系泊力;

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