淹没水平板消浪效果试验研究

发布时间：2018-04-17 03:01

本文选题：透空式消浪结构 + 淹没水平板　；参考：《大连理工大学》2015年硕士论文

【摘要】：传统的消浪结构在海洋工程发展的历程中一直发挥着重要的作用,起到了良好的防御消浪效果,但其存在造价高、技术复杂以及施工时间长等不足,新型透空式消浪结构能够较好地弥补上述不足,越来越得到人们的重视和关注。淹没水平板作为一种透空式消浪结构,具有节约材料、安放方便以及对海洋生态环境破坏低的特性。水平板在大多数情况下能够有效抵御波浪对海洋结构的入侵,较好地满足现代海洋工程的需求。本文通过物理模型试验研究了淹没水平板对于规则波和不规则波的消浪效果,分别在三个不同水深情况下进行了试验,且各水深情况下的水平板淹没深度不尽相同。对于规则波试验而言,分析了水平板淹没深度、相对板宽对于反射系数和透射系数的影响。结果表明反射系数变化微小,淹没水平板对于波浪的反射能力有限,难以得到提升；相对板宽越大,透射系数越小,即波长越小,透射系数越小,说明淹没水平板对于短波的消浪效果良好。本文重点研究了淹没水平板对不规则波的消波作用,通过物理模型试验所得的试验数据,分析了水平板前后的入射谱、反射谱以及透射谱的基本特性,并通过谱面积的大小来衡量水平板对于波浪的能量反射率和透射率,从而得知其消波效果的优异。同时对透射谱进行了拟合,提出了用试验初始入射条件和相应试验工况变量描述的拟合表达式,最后得到的透射谱拟合谱和试验中实测的透射谱吻合良好,各自对应的谱相关参数十分接近。
[Abstract]:The traditional wave dissipating structure has been playing an important role in the development of ocean engineering, and has played a good defense against wave elimination effect, but it has many shortcomings, such as high cost, complex technology and long construction time, etc.More and more attention has been paid to the new porous wave-dissipating structure which can make up for the above deficiencies.The submerged horizontal plate, as a kind of permeable wave dissipating structure, has the characteristics of saving material, convenient placement and low damage to marine ecological environment.In most cases, the water plate can resist the invading of ocean structure by wave, and meet the demand of modern ocean engineering.In this paper, the effect of submerged horizontal plate on wave dissipation of regular and irregular waves is studied by physical model tests. Experiments are carried out under three different water depths, and the submerged depth of horizontal plate is different under different water depths.For the regular wave test, the influence of the submerged depth and the relative width of the plate on the reflection coefficient and the transmission coefficient is analyzed.The results show that the reflection coefficient is small and the reflection ability of submerged horizontal plate to wave is limited, so it is difficult to improve, the larger the relative plate width, the smaller the transmission coefficient, that is, the smaller the wavelength, the smaller the transmission coefficient.It shows that the submerged horizontal plate has good effect on wave elimination of short wave.In this paper, the effect of submerged horizontal plate on the wave suppression of irregular waves is mainly studied. The basic characteristics of incident spectrum, reflection spectrum and transmission spectrum before and after the submerged horizontal plate are analyzed by the experimental data obtained from the physical model test.The energy reflectivity and transmittance of the horizontal plate to the wave are measured by the size of the spectral area, and the excellent wave elimination effect is obtained.At the same time, the transmission spectrum is fitted, and the fitting expression described by the initial incident condition of the test and the corresponding test condition variable is put forward. Finally, the fitting spectrum of the transmission spectrum obtained is in good agreement with the transmission spectrum measured in the experiment.The corresponding spectral correlation parameters are very close.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P75

【参考文献】