波浪作用下并联三箱间窄缝内流体共振

Fluid Resonance in Narrow Gaps Between Three-Box System Under Wave Action

采用数值方法对不同吃水并联三箱在波浪作用下的窄缝间流体共振问题进行研究。考虑大吃水方箱不同布置位置对缝隙内共振波高、三箱系统透射系数与反射系数,以及不同箱体所受波浪作用力的影响。数值结果显示:当大吃水箱体布置于迎浪测时,三箱系统前方反射因数最大,波能无法进入三箱系统,导致三箱系统缝隙内共振波高最小,对应箱体所受水平波浪力和垂向波浪力也最小,说明上游大吃水箱体可对后方形成良好的遮蔽效应;当大吃水箱体位于中间位置时,第一窄缝处共振波高变化最大,并出现双峰现象,此时迎浪侧较小箱体所受水平波浪力最大;当大吃水箱体位于下游时,第二窄缝处的共振波高远大于其他2种工况,并伴随明显双峰,迎浪侧小箱体受垂向波浪力也最大;当大吃水箱体位于中间或下游位置时,大箱受力大小基本相同。

A numerical method is used to study the fluid resonance in narrow gaps between three parallel boxes with different drafts under the action of wave.The influence of different positions of the large draft square box on the resonance wave height in the gap,the transmission factor and reflection factor of the three-box system,and the wave force on different boxes is considered.The numerical results show that:the reflection factor in front of the three-box system is the largest,and the wave energy can not enter the three-box system,which leads to the minimum resonance wave height in the gaps of the three-box system,and the minimum horizontal wave force and vertical wave force on the three-box system,indicating that the upstream large box can form a good shielding effect on the rear;when the large draft box is in the middle position,the resonance wave height at the first narrow gap changes the most,the phenomenon of double peak appears,and the horizontal wave force of the smaller box on the side facing the wave is the largest;when the large draft box is located in the downstream,the resonance wave height at the second narrow gap is far greater than that of the other two cases,accompanied by obvious double peaks,and the vertical wave force of the small box at the side facing the wave is also the largest;when the large draft box is located in the middle or downstream position,the force on the large draft box is basically the same.