光滑粒子水动力学方法（SPH）是一种基于纯拉格朗日思想的无网格粒子方法，在众多科学和工程领域得到了初步应用。本文采用SPH方法对二维宽顶堰溢流进行了数值模拟，并利用机群进行并行计算来提高计算效率，将模拟数据与试验数据进行了对比。结果表明，SPH方法可以模拟出二维宽顶堰自由出流和淹没出流时水流流态、水跌、回流区、水跃现象，计算出溢流流量、流速等水力参数，并且采用数据拟合得出与理论相符的断面流速分布图。结果表明了SPH方法可以较好模拟二维宽顶堰溢流中的流速分布以及水面曲线。

Smoothed particle hydrodynamics (SPH) method is a meshless particle method based on the Lagrangian method, and has been applied in many fields of science and engineering. In this paper, the SPH method was used to simulate the overflow of a two-dimensional broad-crested weir, and parallel computation was carried out to improve the efficiency. The simulation data were compared with the experimental data. The results showed that the SPH method can simulate the hydraulic parameters such as the flow regime, water drops, recirculation zone and water jump phenomenon of the two-dimensional broad-crested weir. We can obtain the flow velocity distribution on the section from the data. This study proved that the SPH method can be used to simulate the flow velocity distribution and water surface profile.

国家自然基金面上基金（51479087）；水沙科学与水利水电工程国家重点实验室开放研究基金资助课题（sklhse-2015-B-02）；青海大学高层次人才项目（k160024）。