ABSTRACT

An obvious slamming phenomenon appears at the inverted ‘L-shaped’ breakwater when impinged by waves. Based on the DualSPHysics numerical program, a numerical tank which can simulate plunging waves is established. The single-phase flow model is adopted in this program, GPU parallel acceleration processing framework and dynamic boundary particles (DBPs) are implemented to improve the calculation efficiency and accuracy. Additionally, The article analyses the characteristics of the slamming pressure amplitude and the spatial distribution of the three structures (Str.0, Str.1and Str.2), and the water particles of the flow condition of the wave field near the structure and velocity distribution are also studied. It is found that the slamming pressure peaks on Str.1 and Str.2 are both reduced by more than 40 percent compared to that on Str.0. Meanwhile, the slamming pressures near the upper corner on Str.1 and Str.2 reduce significantly. Therefore, the optimisation of the structural chamfer is beneficial to effectively improving the safety and stability of the structure.

摘要

倒“L”型防波堤受海浪冲击时出现明显的砰击现象。基于DualSPHysics数值程序，建立了一个可以模拟俯冲波的数值罐。该程序采用单相流模型，实现了GPU并行加速处理框架和动态边界粒子（DBPs），提高了计算效率和精度。此外，文章还分析了撞击压力幅值的特点和三种结构（Str.0、Str.1和Str.2）的空间分布，以及结构附近波场的流动状态和速度的水粒子。分布也进行了研究。发现Str.1和Str.2的砰击压力峰值与Str.0相比均降低了40%以上。同时，Str.1 和 Str.2 上角附近的撞击压力显着降低。因此，结构倒角的优化有利于有效提高结构的安全性和稳定性。