部分反射直墙前潜堤水动力特性研究
An analysis on the hydrodynamic performance of a submerged breakwater in front of a partially reflecting sidewall
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摘要: 基于线性势流理论,对部分反射直墙前潜堤的水动力特性进行了理论研究。利用匹配特征函数展开法给出了潜堤透射系数和反射系数的计算方法,计算结果与边界元方法的计算结果一致。利用数值算例分析了潜堤透射系数和反射系数的主要影响因素。增大部分反射直墙的反射系数,将加大潜堤的透射系数。随着潜堤相对宽度或潜堤与直墙之间相对间距的增加,潜堤透射系数和反射系数呈周期性变化,但变化规律相反。Abstract: On the basis of linear potential theory,an analytical study on the hydrodynamic performance of a submerged breakwater is given in front of a partially reflecting sidewall.The calculating method of the transmission and reflection coefficients of the submerged breakwater is developed by using the matched eigenfunction expansion method.The calculated results of the transmission and reflection coefficients agree very well with those by the boundary element method.The main effect factors of the transmission and reflection coefficients of the breakwater are analyzed.The transmission coefficient of the submerged breakwater increases with the increasing reflection coefficient of the partially reflecting sidewall.With the increasing value of the relative breakwater width or the relative space between the breakwater and the sidewall,both the transmission coefficient and the reflection coefficient of the breakwater vary periodically.But the variations of the reflection and transmission coefficients are just the opposite.
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