准椭圆沉箱开孔结构与波浪作用相互影响的数值研究

Numerical study on the interaction between perforated structure of quasi-ellipse caisson and wave action

为探索规则波作用下开孔结构对准椭圆沉箱与波浪相互作用的影响,基于有限差分方法并结合VOF方法与部分单元体方法建立三维时域数值计算模型,对数值模型进行验证并应用于研究波浪与沉箱结构之间的相互作用,分析开孔结构对水平波浪力以及群墩效应系数的影响。研究结果表明,与不开孔沉箱结构相比,开孔准椭圆沉箱的水平波浪力与群墩效应系数均明显减小,开孔结构使波浪与准椭圆沉箱之间的相互作用更加强烈,进而引起波浪较大的能量耗散,降低了结构承受的水平波浪力。

In order to explore the effect of perforated structure on the interaction between quasi-ellipse caissons and waves under regular wave action,a three-dimensional time domain numerical calculation model was established based on finite difference method,VOF method and partial element method.The numerical model was verified and applied to study the interaction between wave and caisson structure,and the influence of perforated structure on horizontal wave force and group pier effect coefficient was analyzed.The results show that the horizontal wave force and the influence coefficients of group caissons of the perforated quasi-ellipse caisson are significantly reduced compared with that of the non perforated caisson structure.The interaction between the wave and the quasi-ellipse caisson is more intense due to the perforated structure,which leads to greater wave energy dissipation,and reduces the horizontal wave force of the structure.