Numerical simulation of wave interaction with armor block of mound breakwater by SPH-DEM model

DOI：10.7511/dllgxb201302014

 作者 单位 任冰

基于SPH方法和离散单元法(DEM)建立了二维流固耦合数值模型,模拟了波浪作用下斜坡式防波堤护面块体的水动力变化特性．流体模型采用经黎曼接触算法和CSPM修正后的SPH方法,〖JP2〗水槽固壁和造波边界以及结构物边界采用固壁粒子法处理．离散护面块体的运动和受力采用DEM方法来模拟．流体与固体的交界面处满足界面力平衡条件．〖JP〗应用所建立的二维SPH\|DEM耦合数值模型模拟了波浪与斜坡堤护面块体的相互作用,分析了波浪爬坡过程中的流场变化以及波压力沿胸墙的分布规律．物理模型试验验证了所建立的数学模型．

A 2D SPH-DEM fluid-solid coupled numerical model is presented to simulate the hydrodynamic characteristics and motion of the armor blocks of the mound breakwater under wave force. The hydrodynamic conditions of the blocks are treated using the Riemann-CSPM revised SPH method. The solid boundaries, such as the wave maker, tank bottom and tank wall, are simulated by wall particles. The interaction forces and motions between different discretized blocks are calculated using the DEM model. The interface force equilibrium conditions are met on interface of fluid-solid. Based on the above 2D SPH-DEM coupled numerical model, the interaction of wave and armor block of mound breakwater is simulated, and the variation of flow field during the process of wave shoaling and the pressure distribution along the slope are analyzed. The impact pressures when the wave slams on the parapet are also compared with the physical model experimental results.