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Hydrodynamic efficiency of partially immersed caissons supported on piles

机译：沉管桩部分沉管的水动力效率

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摘要

The efficiency of the breakwater, which consists of caissons supported on two or three rows of piles, was studied using physical models. The efficiency of the breakwater is presented as a function of the transmission, reflection and the wave energy dissipation coefficients. Regular waves with wide ranges of wave heights and periods and constant water depth were used. Different characteristics of the caisson structure and the supporting pile system were also tested. It was found that, the transmission coefficient (k_t) decreases with increasing the relative breakwater draft D/L, increasing the relative breakwater width B/h, and decreasing the piles gap-diameter ratio G/d. It is possible to achieve k_t values less than 0.25 when D/L≥0.1. The reflection coefficient takes the opposite trend especially when D/L≤0.15. The proposed breakwater dissipates about 10-25% of the incident wave energy. Also, simple empirical equations are developed for estimating the wave transmission and reflection. In addition, the proposed breakwater model is efficient compared with other floating breakwaters.
机译：使用物理模型研究了由沉箱支撑在两行或三行桩上的防波堤的效率。防波堤的效率表示为透射，反射和波能耗散系数的函数。使用波高和周期范围广且水深恒定的规则波。还测试了沉箱结构和支撑桩系统的不同特性。发现，随着相对防波堤吃水深度D / L的增大，相对防波堤宽度B / h的增大，桩缝直径比G / d的减小，传递系数（k_t）减小。当D /L≥0.1时，有可能使k_t值小于0.25。特别是当D /L≤0.15时，反射系数呈现相反的趋势。拟议的防波堤消散了约10-25％的入射波能量。此外，还开发了简单的经验方程式，用于估计波的透射和反射。此外，与其他浮动防波堤相比，该防波堤模型是有效的。

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  • 来源
    《Ocean Engineering》 |2009年第14期|1112-1118|共7页
  • 作者

    O.S. Rageh; A.S. Koraim; T.N. Salem;

  • 作者单位

    Irrigation and Hydraulics Department, Faculty of Engineering, El-Mansoura University, El-Mansura, Egypt;

    Water and Water Structure Engineering Department, Faculty of Engineering, Zagazig University, Zagazig, Egypt;

    Structural Engineering Department, Faculty of Engineering, Zagazig University, Zagazig, Egypt;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    breakwaters; caissons; piles; wave transmission; wave reflection; energy loss;

    机译：防波堤;沉箱;堆波传输波反射能量损失;

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