混合有限分析法在桥墩水流数值模拟中的应用  

Application of mixed finite element method in numerical simulation of influence of bridge piers on flow

作　　者：方神光 黄胜伟 崔丽琴 

机构地区：[1]珠江水利委员会珠江水利科学研究院,广东广州510611

出　　处：《人民长江》2010年第7期75-78,共4页Yangtze River

基　　金：水利科技创新项目(XDS2007-2)

摘　　要：在河道管理范围内布置桥墩时,较为关注桥墩对壅水和流态的影响,以柳州市局部柳江河道和拟建的维义大桥为例,分别建立大范围的河道和桥墩局部二维水动力数学模型,采用混合有限分析法进行了计算和求解。结果分析表明,维义桥的建设使局部河道产生壅水现象并对河势存在一定的影响。同时也证实了该方法在工程实际应用中的准确性和有效性。The influence of bridge piers on backwater and flow pattern is focused in river management, therefore, taking the proposed Weiyi Bridge and local reach of Liujiang River in Liuzhou City as an example, we established 2D flow mathematical model of river channel in large scale and local model of bridge pier in small scale respectively which was calculated and solved by mixed finite element method. The results show that the construction of Weiyi Bridge would affect backwater and river regime of local river channel to some extent, and the accuracy and effectiveness of the method using in practical engineering are proved as well.

关 键 词：混合有限分析法 二维水流数学模型 桥墩 壅水 

分 类 号：TV148.2[水利工程—水力学及河流动力学]