长江口围垦工程越浪数值模拟研究

运用基于非线性浅水方程的SWASH模型对长江口围垦工程的越浪进行模拟研究。采用垂向结构提高了模型的色散性,使模型适用于深水区,考虑垂向加速度的作用,使浅水区域的模拟更加精确。根据实际具体工程对模型进行验证并与海堤规范计算结果进行比较。研究表明:该模型和海堤规范都能很好地对越浪量进行计算,模型计算结果更为精确,工程中栅栏板对波浪的耗散等还需在数模中进一步概化和优化。

Numerical simulation of wave overtopping of reclamation engineering at Yangtze River estuary

This paper studies the wave overtopping of reclamation engineering at the Yangtze River estuary with nonlinear shallow water equation SWASH model.In order to improve the dispersion of model,the vertical direction of model is divided into two layers,and the acceleration of vertical direction is considered.And then,the wave overtopping calculated by the sea embankment standard and SWASH model are compared to study the accuracy of the two ways.The results show that both the two ways can compute the wave overtopping exactly,and the result of model is more accurate.And,the impact of barrier board to wave overtoping should be considered in the numerical simulation.