渡槽模型实测模态合成的研究  

Research on the Modal Synthesis of Aqueduct Model

作　　者：李正农[1] 卢剑[1,2] 朱旭鹏[1] 李继孟[1] 张盼盼[1] 

机构地区：[1]湖南大学建筑安全与节能教育部重点试验室,湖南长沙410082 [2]云南省设计院,云南昆明650032

出　　处：《湖南大学学报（自然科学版）》2011年第9期1-6,共6页Journal of Hunan University:Natural Sciences

基　　金：'十一五'国家科技支撑计划资助项目(2006BAB04A05)

摘　　要：分别对渡槽模型的桩及槽墩两部分进行了模态实测.为了能把两个部分的实测结果合成一个整体,并且能在实测中最大限度地减少对桩中已安装传感器的破坏,利用模型的对称性以组合系统的频响特性、结构的位移协调条件,推导出简单易行振型合成方法,实现了对桩模态与槽墩模态的组合.实测组合结果与有限元计算结果基本吻合,从而验证了该方法在实际工程中的可行性.The modal experiments for a single pile and a pier were implemented.In order to synthesize the two parts of the experiment results into a whole and minimize the destruction,the sensors were installed on the pile in the experiment.A simple modal synthesis method has been derived.The first is the symmetry of the model,the second is the theory of frequency response characteristics of composite systems,and the third is the structural displacement harmonized condition.This method realizes the combination of the pile-pier modal.At the same time,the finite element calculation results are consistent with the experiment results,which validates the feasibility of the method proposed.

关 键 词：模态 子结构 对称性 有限元 

分 类 号：TU352.1[建筑科学—结构工程]