圆形重力式网箱浮架结构在波浪作用下的运动响应

依据Stokes二阶波浪理论和莫里森(Morison)方法,对圆形重力式网箱的浮架结构在两种锚碇系统(折线形和直线形)的作用下,浮架上特定点的运动轨迹进行了数值计算与水槽试验,比较结果发现在研究的波况下浮架的运动位移受波长影响较小,而与波高关系密切,在锚碇系统的约束下水平位移远小于垂向位移。数值计算与试验数据吻合较好,表明了此计算方法的可行性,为进一步模拟浮架结构的受力与变形打下基础。

MOVEMENT RESPONSE OF FLOATING CIRCLE COLLARS OF GRAVITY CAGES SUBJECTED TO WAVES

The movement of a floating circle collar of a gravity fish-farming cage with two types of mooring system commonly used in practice was studied. The wave forces acting on the collar and the cable are derived by Morison method using the second order Stokes wave theory. The trajectories of the tracing points on the collar were numerically computed and physically measured, respectively. The results showed that in the investigated conditions the wave height had significant effect on the displacement of the collar while the wave period turned out to be of little influence. The vertical displacements were much larger than the horizontal ones. Numerical results agreed well with experimental data, which verified the accuracy of the numerical method.