基于不同残差的桥梁结构模型修正

英文篇名：Model Updating of Bridge Structures Based on Different Residuals
中文刊名：武汉理工大学学报(交通科学与工程版)
英文刊名：Journal of Wuhan University of Technology(Transportation Science & Engineering)
作者：黄民水 ; 朱宏平
英文作者：Huang Minshui1 ; 2) Zhu Hongping1)(School of Civil Engineering and Mechanics ; HUST ; Wuhan 430074)1)(Transportation Research Center ; WIT ; Wuhan ; 430073)2)
中文关键词：桥梁结构 ; 频率残差 ; 振型残差 ; 模型修正
英文关键词：bridge structure ; frequency residual ; mode shapes residual ; model updating
出版日期：2009-08-15
机构：华中科技大学土木工程与力学学院;武汉工程大学交通研究中心;
年：2009
期：04
出版单位：武汉理工大学学报(交通科学与工程版)

摘要

由于建模和分析过程中的众多不确定因素,有限元分析预测的响应与实际结构响应不可避免地存在偏差,因此必须对有限元模型进行修正.文中提出了一种基于不同残差的桥梁结构模型修正方法,介绍了频率残差和振型残差的概念,目标函数的确定和设计参数的选择方法.对一根简支梁进行了仿真分析,结果表明该方法简单可行.基于振动测试数据,对一个桥梁工程实例进行模型修正,修正后的桥梁有限元模型的动力特性更加趋近现场振动测试值.
Because of the uncertainty in the process of modeling and analysis,there are inevitably differences between structural responses obtained by FEM and test in site,that is,the FEM needs to be updated.In the paper,a method of bridge structure model updating based on different residuals is presented.Firstly,the concepts of frequency residual and mode shapes residual are introduced,the determination of objection function and selection methods of updated parameters are emphatically investigated.Secondly,a simulated simply supported beam is analyzed,it is clearly seen that the proposed method is simple and applicable.Finally,a road bridge is used to verify the feasibility of the method for actual structures,the results show that the dynamic characteristics of the updated FEM is closer to test ones.

引文

[1]张开银,孙峙华,邹晓军,等.桥梁结构损伤识别的曲率模态技术[J].武汉理工大学学报:交通科学与工程版,2004,28(6):855-858.
    [2]李辉,丁桦.结构动力模型修正方法研究进展[J].力学进展,2005,35(2):170-180.
    [3]荣见华,郑健龙,徐飞鸿.结构动力修改及优化设计[M].北京:人民交通出版社,2002.
    [4]淳庆,邱洪兴.钢桁梁桥基于模型修正方法的损伤识别研究[J].地震工程与工程振动,2005,25(2):114-118.
    [5]Huth O,Feltrin G,Maeck J,et al.Damage identifi-cation using modal data:experiences on a pre-stressed concrete bridge[J].Journal of Structural En-gineering,ASCE,2005,131(12):1898-1920.
    [6]Hassiotis S,Jeong G D.Identification of stiffness re-ductions using natural frequencies[J].Journal of En-gineering Mechanics.ASCE,1995,121(10):1106-1113.
    [7]曹树谦,张文德,萧龙翔.振动结构模态分析———理论、试验与应用[M].天津:天津大学出版社,2001.
    [8]Brownjohn J M W,Moyo P,Omenzetter P.Assess-ment of highway bridge upgrading by dynamic testingand finite-element model updating[J].Journal ofBridge Engineering.ASCE,2003,8(3):162-172.