平板及立板式防波堤散射波浪力研究

Study on wave exciting force of horizontal and vertical plate type breakwater

文章应用边界单元方法研究了波浪与平板及立板两种防波堤结构的相互作用,揭示了这两种型式防波堤的散射波浪力与板的相对板厚、相对潜深及相对板长之间的关系。研究发现:(1)有效波浪力存在的前提条件是潜深小于0.5m并且板厚为O(0.005m);(2)水面和水下平板的垂荡波浪力为控制要素并有极值存在,横摇波浪力可以忽略;(3)水面或者水下立板的横荡波浪力为控制要素,并且横摇波浪力约为平板的20倍。

The interaction between wave and horizontal and vertical plates is investigated by boundary element method, the relations of wave exciting force with plate thickness, submergence and length are obtained. It is found： （1） The efficient wave exciting force exists while plate submergence is less than 0.5m and plate is very thin with order O（0.005m）; （2） The maximum heave wave exciting force exists and is main factor for surface and submerged horizontal plate while roll force can be ignored; （3） The maximum sway wave exciting force exists and is main factor for surface or submerged vertical plate and roll force is about 20 times of horizontal plate.