%0 Journal Article
%T 基于监测数据的隔震结构模态参数异变分析<br>Analysis of the Abnormal Change of Isolated Structure Modal Parameters Under Healthy Condition　Based on Long-Term Monitoring Data
%A 杜永峰
%A 祝青鑫
%A 李万润
%A 朱前坤
%A 
%J 振动.测试与诊断
%D 2018
%R 10.16450/j.cnki.issn.1004-6801.2018.03.013
%X 为了检验隔震设计并保证结构的安全性，在某中学教学楼上设计并安装了一套隔震结构长期健康监测系统，记录该结构的主要环境因素参数以及结构在不同荷载工况作用下的响应数据。基于采集到的结构加速度响应数据，采用改进的Morlet小波模态参数识别方法对其进行实时分析处理，识别结构在不同工况下的结构模态参数，分析环境因素以及人为活动对其影响规律。分析结果表明，人员活动以及环境温度的变化对隔震结构的动力特性有较大影响，应在设计时予以考虑。最后，对结构健康监测系统采集到的两次地震响应数据进行分析，给出隔震结构在地震作用下的结构特性变化规律。<br>Due to its excellent damping effect, seismic isolation technology is widely used in the lifeline engineering such as school, hospital and etc. A set of long-time structural health monitoring system is designed and installed in a teaching building to test the isolation design and ensure its safety. This system can record the structural response to common environmental factors and different loads. Based on the collected data of the structural acceleration response, the improved Morlet wavelet modal parameter identification method is used to analyze and process the data in real time, identify structural modal parameters under different conditions, and analyze the impact on the law from the environmental factors and human activities. The result indicates that the changes of personnel activities and environment temperature have great influence on the dynamic characteristics of the isolated structure, which should be considered in the design. Finally, two seismic response data collected by the structural health monitoring system are analyzed, and the structure characteristics’ variation law of the isolated structure under earthquake is concluded
%K 基础隔震
%K 结构健康监测
%K 小波变换
%K 环境激励
%K 地震激励
%K 模态参数&lt
%K br&gt
%K base isolation
%K structural health monitoring
%K wavelet transform
%K ambient excitation
%K earthquake excitation
%K modal parameter
%U http://zdcs.nuaa.edu.cn/ch/reader/view_abstract.aspx?file_no=201803013&flag=1