沿河公路丁坝群水毁防护平面二维水流数值模拟研究

从平面二维水动力学方程组出发,根据有限元Galerkin加权余量法离散模型方程组,并利用Newton-Raphson迭代法求解,建立丁坝绕流平面二维水流数学模型。利用水槽试验数据对模型进行了验证,模型计算结果与实测值吻合良好。将模型应用到河龙高速清溪河段水毁防护工程,对丁坝群护岸进行了模拟分析,结果表明,该模型在丁坝群护岸工程的水流模拟中具有推广价值。

Numeral Simulation of Planar 2-D Flow with Spur-dikes Protecting Riverside Subgrade

Based on the difference equations for 2-D depth-averaged current, the 2-D mathematical model with spur-dikes is proposed, which is solved by finite element method using Galerkin method of weighted residuals and Newton-Raphson non-linear iteration. The calculated results agree with the measured data from a laboratorial flume with spur-dikes. The model is also applied to simulate the flow field around spur-dikes, which protect the Helong highway near Qingxi river reach. It shows that the model is feasible to simulate the 2-D flow with spur-dikes.