摘要
在分析束窄河床水流特点的基础上 ,基于二维浅水方程组 ,得到了宽阔河流上分期导流束窄河床水流的计算模型 ,采用普列斯曼差分格式离散方程组 ,交替方向隐格式 (ADI)法求解 ,编制了计算程序 ,针对某实际工程进行了计算分析 ,验证了其围堰设计高程可以满足挡水要求 ,根据计算结果提出了一期土石围堰的保护措施 ,物理模型试验结果显示所建数学模型具有较高的可靠性和精度 .
By analyzing characteristics of the current on narrowed riverbed, the calculation model of the current on narrowed riverbed during stage diversion on the wide river was presented based on the two dimensional shallow water equation group. The program was worked out by using Preissmann difference scheme and alternating direct implicit (ADI) method. The computation and analysis was aimed at an actual project. It was proved that the cofferdam′s elevation was suitable for the requirement of retaining water, and some measures were proposed to protect the earth and rockfill cofferdam at the first stage according to the result of calculation. The result of the physical model test shows the mathematical model possesses high reliability and precision, and it can provide the basis for design and construction decision.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第3期81-84,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
关键词
分期导流
束窄河床
数值模拟
stage diversion
narrowed riverbed
numerical simulation
