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基于附加虚拟质量的结构损伤识别方法
引用本文:侯吉林,王真真,欧进萍,&#;ukasz JANKOWSKI.基于附加虚拟质量的结构损伤识别方法[J].计算力学学报,2013,30(6):770-776.
作者姓名:侯吉林  王真真  欧进萍  &#;ukasz JANKOWSKI
作者单位:大连理工大学 土木工程学院, 大连 116024;大连理工大学 土木工程学院, 大连 116024;大连理工大学 土木工程学院, 大连 116024;哈尔滨工业大学 土木工程学院, 哈尔滨 150090;波兰科学院 基础技术研究所智能技术部, 华沙 02-106, 波兰
基金项目:国家重点基础研究发展计划(973计划)(2013CB036305);国家自然科学基金(51108057,51108066,51108060);“十二五”国家科技支撑项目(2011BAK02B01,2011BAK02B03);中国博士后基金特别资助(2012T50255);中央高校基本科研业务费(DUT13LK13)资助项目.
摘    要:针对大型土木结构的模态信息往往对局部损伤灵敏度较低的特点,提出通过在各个子结构上附加虚拟质量的方法提高局部灵敏度,实现整体结构的准确损伤识别。该方法无需在结构上布置真实质量,它首先利用虚拟变形法(VDM)可进行结构快速重分析的思想,由实测结构的激励和加速度响应,构造结构附加虚拟质量后虚拟结构的频率响应;然后结合灵敏度分析和附加质量与频率关系,确定所需附加质量和对应具有较高灵敏度的频率;最后分别在每个子结构上附加虚拟质量,联合所有虚拟结构和对应的频率即可准确快速地识别出整体结构各个子结构的损伤。本文通过两层平面框架有限元模型验证了附加质量损伤识别方法的有效性。

关 键 词:结构健康监测  损伤识别  虚拟变形法  灵敏度分析  频率
收稿时间:2012/4/28 0:00:00
修稿时间:2012/8/10 0:00:00

Structural damage identification using additional virtual masses
HOU Ji-lin,WANG Zhen-zhen,OU Jin-ping and &#;ukasz JANKOWSKI.Structural damage identification using additional virtual masses[J].Chinese Journal of Computational Mechanics,2013,30(6):770-776.
Authors:HOU Ji-lin  WANG Zhen-zhen  OU Jin-ping and &#;ukasz JANKOWSKI
Institution:School of Civil Engineering, Dalian University of Technology, Dalian, 116024, China;School of Civil Engineering, Dalian University of Technology, Dalian, 116024, China;School of Civil Engineering, Dalian University of Technology, Dalian, 116024, China;School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;Smart-Tech Centre, Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw 02-106, Poland
Abstract:It is big challenging to identify the damage of the structures accurately in civil engineering,since the structures usually are huge,complex,and insensitive to local damage.Aiming at this problem,Adding virtual mass method is proposed for improving the sensitivity of every substructure,and realizing the accurate identification of global structure.First,The frequency response with addition mass is constructed using the knowing the excitation and acceleration response by virtual distortion method (VDM),which is a fast structural reanalysis method;then the quantity of mass and the according select natural frequency which high sensitivity are determined by the sensitivity analysis and the relationship between the mass and natural frequency;last,the damage of the global structure can be identified precisely using the combined natural frequencies of the all the virtual structures,of which each is constructed by adding mass on the according substructure.A finite element model of a plan frame with 2 floors is used to verify the proposed additional virtual mass method.
Keywords:structural health monitoring(SHM)  damage identification  virtual distortion method (VDM)  sensitivity analysis  natural frequency
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