《南水北调与水利科技》：大型渡槽流固动力耦合效应试验研究（张林让,吴杰芳,陈敏中,尹高强）（摘要）

摘要：以南水北调工程穿黄箱形渡槽为研究对象，采用大比尺水弹性振动渡槽模型在水平振动台上进行试验，研究了地震作用下和谐激励下水体与槽体相互作用效应和机理，并将试验结果和Housner模型计算结果进行了对比分析，结果表明流固耦合作用对渡槽结构的动力特性、振动位移和动应力响应及槽内水体的动水压力特性有很大影响，弹性槽壁上的动水压力远大于刚性壁上的动水压力。试验条件下，由槽内水体晃动产生的动力压力很小。基于研究结果最后对Housner模型在抗震分析中的应用提出了修正建议。

关键词：渡槽；水弹性模型；流固动力耦合；动水压力；水体晃动

中图分类号：TV68；TV312 文献标识码：B 文章编号：1672-1683（2008）01-0006-05

Fluid-Structure Dynamic Coupling for a Large Aqueduct

ZHANG Lin-rang1,WU Jie-fang1,CHEN Min-zhong1,YIN Gao-qiang2

(1.Yangtze River Scientific Research Institute,Wuhan 430010;

2.Central Southern China Power Design Institute,Wuhan 430071,China)

Abstract:For the box-shape aqueduct crossing the Yellow River in the South-North Water Projece,a large scaled hydro-elastic model was fabricated for studying the dynamic coupling between the wall of aqueduct and the water in it.The model was put on the shaker and excited by harmonic or earthquake wave,some results were obtained and compared with the analytical ones based on Housner model.The results show the dynamic coupling between the elastic wall and the water has great effect on the dynamic properties,the displacement and the stress of aqueduct structure and on the dynamic water pressure,The dynamic pressure on the wall of aqueduct is much greater than that by Housner""s method.The dynamic pressure on the wall induced by the surging wave of water in the aqueduct is very small.A modification suggestion about the Housner model in the seismic analysis of the aqueduct is proposed.

Key words:aqueduct;hydro elastic model;fluid-structure coupling;dynamic pressure;surging wave of water

参考文献：

[1]Jae Kwan,Hyun Moo Koh.Im Jong kwahk Dynamic Response of Rectangular Flexible Fluid Containers[J].Engineering Mechanics,9,1996.

[2]居荣初，曾心传.弹性结构与液体的耦联振动理论[M].北京：地震出版社，1983.

[3]李敏霞，陈厚群，王济，等.渡槽结构隔震耗能减振控制的试验研究[J].地震工程与工程振动，2002，22（4）.

[4]吴轶，莫海鸿，杨春.大型矩形渡槽-水耦合体系的动力性能分析[J].地震工程与工程振动，2004，24（4）.

基金项目：长江科学院院内科研基金项目（大型渡槽抗震研究-隔震技术、槽内动水作用机理研究，合同编号：院基金爆2002-01）

作者简介：张林让（1962-），男，陕西宝鸡人，高级工程师，主要从事工程振动与抗震方面的研究。