沉箱上圆柱形浮体的响应和水动力特性分析

Response and hydrodynamic forces of a floating circular cylinder over a caisson

文章采用线性波理论和特征函数展开法,推导了带沉箱圆柱形浮体的辐射和绕射速度势解析表达式,并对垂荡运动和水动力垂向分量进行了数值分析;研究表明相对较大的沉箱不仅改变了浮体垂荡运动幅值和水动力垂向分量幅值,而且改变了幅值的变化趋势;相对较小的沉箱对浮体的垂荡运动和水动力垂向分量的影响可以忽略。

The linear potential theory and the eigenfunction expansion approach are used to derive the radiation and diffraction velocity potential analytical expressions of a floating circular cylinder over a caisson in water of finite depth. Numerical results of the heave response and the vertical hydrodynamic forces are presented. The numerical results show that the behaviour of the heave response and the vertical hydrodynamic forces become complex for the caisson of bigger size and the effect of the caisson can be ignored if the size of the caisson is relatively smaller.