摘要
针对实际多维结构的偏心距难以直接获得的情况,提出基于扩展卡尔曼滤波算法实现偏心结构整体质量、水平刚度和偏心距的同步识别方法,并由此指导调谐质量阻尼器(tuned mass damper,简称TMD)的实际最优布置位置。以一非对称钢筋混凝土框架结构为例,基于自由振动及参数识别算法实现结构整体偏心距等参数的准确识别,分析了不同位置布置TMD对结构减震效果的影响。结果表明:扩展卡尔曼滤波对结构多参数识别具有较高的精度,在此基础上选取合理位置布置TMD对双向偏心结构具有更好的减震效果,且具备较强的工程可行性。
The seismic responses of engineering structure can be dramatically reduced by the energy dissipation from tuned mass damper (TMD). For the actual eccentric structure, the eccentricity values are hard to be determined, however, the control efficiency will decline if the TMD is simply installed not considering the real eccentricities. Hence, the optimal install location of TMD needs to be studied in details. Under the condition that the eccentricity of actual multidimensional structure is difficult to be obtained accurately, a parameter identification method based on extend Kalman filter (EKF) is presented in order to simultaneously identify the structural mass, the horizontal stiffness and the eccentricities in two horizontal vectors, thus the optimal location of TMD can be determined based on the real physical parameter. As an example, an asymmetric reinforced concrete frame structure is analyzed based on free vibration responses and EKF, and the parameters such as the integrated eccentricities are accurately identified, and the seismic responses for different locations of TMD are compared. The results show that the parameters can be identified accurately with EKF, and best control rate can be obtained after choosing the rational locations, this method has superior feasibility in engineering practice. © 2017, Editorial Department of JVMD. All right reserved.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2017年第2期301-306,共6页
Journal of Vibration,Measurement & Diagnosis
基金
国家自然科学基金资助项目(51478024)
工程抗震与结构诊治北京市重点实验室重点资助项目(USDE201403)
关键词
减震控制
偏心结构
调谐质量阻尼器
参数识别
扩展卡尔曼滤波
Acoustic devices
Energy dissipation
Identification (control systems)
Kalman filters
Location
Parameter estimation
Reinforced concrete
Seismic response
Seismology
Vibration analysis
