波浪对透空式结构物冲击作用的光滑粒子流体动力学数值模拟
The numerical simulation of wave slamming on an open-piled structure using the SPH model
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摘要: 基于光滑粒子流体动力学(SPH)方法的二维数值波浪水槽模拟了规则波对透空式结构物的冲击作用。通过黎曼解和CSPM相结合的方法对连续方程和动量方程进行了修正。对造波边界采用虚粒子法模拟。提出了一种耦合计算方法来消除造波边界附近的压力波动现象,在结构物边界处设置了适合的冲击边界条件。应用修正的SPH模型模拟了规则波对浪溅区结构物的冲击作用,给出了结构物附近流场和压力场的变化特征,并应用物理模型试验结果对数值模型进行了验证。Abstract: A two-dimensional numerical flume is presented to investigate the regular wave slamming on an open-piled structure using the corrected SPH method. The model employs CSPM and Riemann solution to discretize the Navier-Stokes equations. Solid boundaries are simulated by wall particles. The pressures of these dummy particles are determined by a coupling approach, which can keep the pressure field more stable near the boundaries. A new impacting boundary condition is proposed to track the hydrodynamic characteristics around the structure. The improved SPH model is employed to simulate the regular wave impacting the open-piled structure in the splash zone. The main features of the velocity and pressure fields near the structure are presented. And the model is validated against the experimental data and a good agreement is observed.
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Key words:
- smoothed particle hydrodynamics /
- wave slamming /
- numerical flume
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