不规则波作用下双潜堤透射系数的试验研究

Experimental research on transmission coefficient of double submerged breakwater under irregular waves

潜堤是一种消浪效果较好的建筑物,但在实际工程中,部分单潜堤不能满足堤后波高要求。通过物理模型试验研究双潜堤结构对消浪的影响,分析入射波高、相对淹没深度和波陡等影响潜堤透浪系数的相关因素。结果表明,潜堤淹没深度越大,透射系数越小,消浪效果越好。随着波陡的增加,潜堤的透射系数会减小。将试验结果与多个透浪系数的经验公式进行比较,验证了杨正己公式的适用性,可分别计算双潜堤的堤后波高。

The submerged breakwater is a kind of building with good wave dissipation effect,but in practical engineering,some single submerged breakwater can not meet the requirements of wave height behind the breakwater.The influence of double submerged breakwater structure on wave dissipation is studied by physical model test,and relevant factors affecting the wave penetration coefficient of the submerged breakwater are analyzed,such as incident wave height,relative submergence depth and wave steepness.The results show that with the increase of the submergence depth,the transmission coefficient of submerged breakwater decreases,and the wave dissipation effect of submerged breakwater turns better.The transmission coefficient of the submerged breakwater decreases with the increase of wave steepness.At the same time,the experimental results are compared with the empirical formulas of the permeability coefficients of various countries,which verify the applicability of Yang Zhengji′s formula and can calculate the wave heights behind the double submerged breakwaters separately.