新疆叶尔羌河中游河段水沙运动的数值模拟  

Numerical modeling of Flow-sediment movement in the Middle Course of Xinjiang Yerqiang River

作　　者：牧振伟[1] 赵涛[1] 任江龙[2] 

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]新疆水利水电勘测设计研究院,新疆乌鲁木齐830000

出　　处：《水力发电》2008年第3期28-30,共3页Water Power

基　　金：新疆水利水电工程重点学科基金资助(XJZDXK-2002-10-05)

摘　　要：采用有限元法离散二维模型方程建立了新疆叶尔羌河中游河段水沙运动的平面二维数学模型,对常微分方程系数矩阵运用质量集中原则近似处理,而后采用"预报—校正—迭代"的差分计算格式求解常微分方程组,该计算过程稳定性较好、效率较高。在动边界问题上,引入虚拟水深处理后,可以保证数值计算的连续性。用该模型对叶尔羌河中游河段的水沙运动进行数值模拟,并把计算结果同实测值进行了对比验证,结果吻合良好。This paper developed the Plane two-dimensional numerical modeling of flow-sediment movement in the middle course of Yerqiang River.Two-dimensional equation was discretized by finite element method.The coefficient matrix of ordinary differential equation was dealt with mass concentration principle approximatively,after that we used ＂forecast-correction-iteration＂ method to solve ordinary differential equations,the stability of this calculation process is better and the efficiency is comparatively high.On the treatment of hydrodynamic boundary,after drawing into the fictitious water depth which can ensure the continuity of numerical calculation.The flow-sediment movement in the middle course of Yerqiang River was simulated by using this model.Overall,the computational simulations agree well with the experiments and show that the results are stable.

关 键 词：多沙运动 数值模拟 叶尔羌河 新疆 

分 类 号：TV142[水利工程—水力学及河流动力学]