带横隔板局部开孔沉箱在斜向波作用下的受力研究

基于线性势流假定,对斜向波作用下带横隔板局部开孔沉箱防波堤的水平波浪力进行了理论研究。给出了开孔沉箱法向水平力和横隔板受力的理论计算方法,在极限情况下波浪力的计算结果与文献中的已有结果一致。利用数值算例分析了开孔沉箱总水平力的主要影响因素。开孔沉箱法向总水平力的减小主要集中于结构上半部分波浪影响范围以内。增加单个开孔沉箱的长度有利于减小结构所受总水平波浪力。当波浪入射角或沉箱前开孔墙孔隙影响系数幅值较大时,开孔沉箱横隔板上总水平力的最大值要超过相应的沉箱法向总水平力,此时要注意横隔板的强度问题。

Theoretical study of diagonal wave forces acting on partially perforated caisson breakwater with transverse walls

A theoretical study of diagonal wave for cesacting on partially perforated caisson breakwater with transver sewalls is performed based on the linear potential theory.An analytical method is developed to calculate the normal horizontal for cesacting on caissons,as well as the horizontal fo rcesacting on trans verse walls.The calculating results of wave forces for limited cases are the same to existing results in liter atures.The main influencing factors of wave forces are analyzed by means of numerical examples.The reduction of normal total horizontal forceacting on perforated caisson is mainly due to the upper perforat edsection of structure,where the influence of incident waves is significant.The incr easing sing lecaisson leng th is helpful to reducing total horizontal force acting on caissons.With larger incident wave angle or porous influence parameter modulus of caisson perforated front wall,the maximum total horizontal force acting on the transverse wall is larger than the corresponding normal total horizontal force acting on the caisson.At this time,the structural strength of transver sewalls should be enhanced.