摘要
基于无结构化网格,采用有限元方法,建立起一种适合于分汊河道的平面二维水沙数学模型,模型采用质量集中的简化处理和预估校正的时间推进算法,较好地解决有限元计算存储量和计算速度。并以武汉天兴洲汊道段为例,进行水沙验证计算,验证结果与实际符合较好,证明模型能较好地模拟天然分汊河道的水流泥沙运动及河床变形情况,因此可为分汊型河道的整治提供技术支持。
Based on triangular grids, the planar 2-D flow and sediment mathematical model in natural branching river has been established by using the finite element method. Since the mass concentration and pre-estimated and verified iteration are used to solve the equations, the question of memory units and calculation velocity are settled quite well. Simulation calculation carried out on Tianxingzhou reach of the Yangtze River shows the result is closely fitted with the field data, which showes that the model is creditable, it can provide the technical support for research on the natural branching river regulation.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2007年第1期33-37,共5页
Journal of Sichuan University (Engineering Science Edition)
基金
国家973计划资助项目(2003CB415200)
国家自然科学基金资助项目(50579054)
关键词
分汊河道
有限元
二维水沙数值模拟
branching river
finite element method
2-D flow and sediment mathematical model
