斜坡式防波堤透浪特性的试验研究

发布时间：2018-03-08 12:34

本文选题：斜坡堤　切入点：长周期波　出处：《大连理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：斜坡堤通常由堤心石和护面块体等材料构成,是一种可以透浪透流的多孔介质结构,在海岸工程中得到了广泛的应用。而在有较长周期波浪的地区,堤身空隙透浪将恶化港内的泊稳条件,虽然透射波高较小,但是由于其波长较长,对港内泊稳的影响较大,不可忽视。本文针对实际工程中典型的可渗透斜坡堤结构,选取合适的试验波浪条件,采用物理模型试验的方法,对斜坡堤在较长周期波浪作用下的透浪特性进行系统分析研究,并以此提出可供实际工程应用的透浪系数计算公式。论文的主要研究内容为： (1)针对不同波高、周期条件进行斜坡堤透浪试验,研究波高、波陡等参数对防波堤透浪的影响； (2)变化堤前水深、防波堤宽度等,研究堤前水深、堤身宽度等对堤后渗透波浪的影响； (3)选取不同尺寸的堤心石进行试验,研究堤心石尺寸对防波堤波浪渗透的影响； (4)在上述试验研究成果的基础上,结合理论分析,总结和比较国内外有关防波堤透浪系数的计算公式,推导得出斜坡堤渗透波高系数的计算公式； (5)分析斜坡堤堤后波浪的周期变化和堤后波浪的频谱变化。试验结果表明：深水波陡Hi/(gT2)、堤心石相对宽度B/D以及堤前相对水深d/L等因素对斜坡堤透浪系数的影响较大,且将推导的计算公式与其他学者关于波浪透射的物理模型试验结果进行比对,结果较为吻合,可供工程设计参考与相关工作的进一步研究。
[Abstract]:Slope breakwater usually consists of breakwater armor blocks and stone and other materials, is a kind of porous medium can flow through the wave structure, has been widely used in coastal engineering. While in the longer period waves in the wave will worsen the dyke gap in port berthing condition, although the transmission of lesser height however, because of its long wavelength, a great influence on the anchor stability, can not be ignored.
Permeable slope dike structure according to the actual engineering typical test, choosing proper wave conditions, using the method of physical model test and analysis system of wave transmission characteristics in longer period waves under the embankment, and then puts forward for the practical engineering calculation formula for wave transmission coefficient. The main research contents this is:
(1) the influence of wave height, wave steepness and other parameters on breakwater penetration is studied on different wave heights and periodic conditions.
(2) the change of embankment depth, width of breakwater, embankment depth, influence of dike width on the embankment after wave penetration;
(3) the influence of the size of the core stone on the wave penetration of the breakwater is studied by selecting the different sizes of the core stone.
(4) based on the above research results, combined with theoretical analysis, the calculation formulas of wave penetration coefficient of breakwaters at home and abroad are summarized and compared.
(5) the periodic variation of the wave after the slope embankment and the frequency spectrum of the wave after the embankment are analyzed.
Experimental results show that the deep water wave steepness Hi/ (gT2), influence of core B/D and the relative width of embankment relative water depth d/L and other factors on the permeability coefficient of the embankment slope is large, and the calculating formula of the physical model and other scholars about the wave transmission of the test results were compared, the result is consistent with the further study the reference for the engineering design and related work.

【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U656.2

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