梁式渡槽“改进拟三维”流固耦合模型研究  

Study on Improved Pseudo-three-dimensional Fluid Structure Interaction model of Beam Aqueduct Structures

作　　者：徐梦华[1] 莫海鸿[1] 周小文[1] 

机构地区：[1]华南理工大学土木与交通学院,广州510640

出　　处：《长江科学院院报》2009年第9期80-84,共5页Journal of Changjiang River Scientific Research Institute

基　　金：广东省水利科技计划项目(ysk2008-13)

摘　　要：基于结构动力分析理论和流固耦合分析理论,在已有的"拟三维"梁式渡槽建模方法的基础上,提出了"改进拟三维"梁式渡槽流固耦合建模方法。模型不仅能实现渡槽与大晃动水体的双向同步耦合,而且大大提高了计算效率,可用于多跨渡槽联合的流固耦合计算分析。除此之外,模型还可以用于计算带有加劲结构型式的渡槽。以东深供水渡槽的某段为例,采用提出的"改进拟三维"模型进行地震时程分析,计算结果与三维模型计算结果吻合良好,计算效率高。因此,提出的模型可以作为梁式渡槽分析计算的实用静、动力分析方法。On the basis of the structural dynamic analysis theory and fluid structure interaction theory, this paper puts forward the ＂ improved pseudo three-dimensional＂ beam aqueduct computing mode replacing the existing ＂pseudo three-dimensional＂ beam aqueduct model. In this paper, the model can not only achieve two-way synchronization FSI （ fluid structure interaction） of the aqueduct with large sloshing water, but also greatly improves calculating efficiency. So the model can be used for calculating and analyzing the joint multi-span aqueduct considering FSI. In addition, the ＂improved pseudo three-dimensional＂ can be used to calculate the aqueduct structure with a stiffening rib. One segment of Dongshen Water Supply Aqueduct is analyzed by employing ＂improved pseudo three- dimensional model＂, which yields much close results compared those using 3 D finite element model. Therefore, the improved pseudo three-dimensional dynamic analysis method is proved to be a practical static and dynamic analysis method for dynamic analysis and seismic design of large aqueduct structures with high efficiency.

关 键 词：渡槽结构 改进拟三维 流固耦合 地震响应 

分 类 号：TV672.3[水利工程—水利水电工程] TV135