侧立孔板对浮体波浪散射及波浪力的影响机理

Influence mechanism of vertical porous walls on wave scattering and exciting forces initiated by a floating body

为了探究侧立孔板对浮体波浪特性的影响,基于二维势流理论,利用分离变量法和函数正交特性,针对带有侧立透水孔板的浮式结构物,以解析解的形式建立了该浮式结构物水动力分析的无量纲理论计算模型。给出了纵荡、垂荡和纵摇三个方向上浮体所受波浪力随入射波变化的曲线,分析了波浪反射系数和透射系数随波长变化的变化趋势,计算结果与现有研究成果吻合良好。研究结果表明:侧立透水孔板能够显著降低浮式结构物在纵摇方向上受到的波浪力矩,这对维持浮式平台的稳定性具有重要意义;侧立透水孔板还可以在一定的波长范围内减小波浪透射系数和提高波浪反射系数。

In exploring the influence of vertical porous walls to the wave characteristic of floating body,This paper presents a dimensionless theoretical calculation model for hydrodynamic analysis of a floating body with vertical porous walls,which is based on the two-dimensional potential theory and orthogonal function-based analytical method.The curve of the floating body hydrodynamic forces changing with incident wave along the surge,heave,and pitch directions is given,and the variations of wave reflection coefficient and transmission coefficient with incident wavelength are analyzed.The calculated solution coincides well with current literature results,and the research results show that the wave moment of a floating body in the pitch direction can be greatly reduced by the vertical porous wall,which is important in maintaining the stability of a floating platform.Furthermore,the vertical porous wall can decrease transmission coefficient and increase reflection coefficient in a certain range of wavelength.