东南大学学报（自然科学版）Issue(3)：539-543,5.DOI:10.3969/j.issn.1001-0505.2015.03.022
基于能量原理和Kalman滤波器的实时模型修正策略
In-time model updating strategy based on energy theory and Kalman filter
摘要
Abstract
In order to monitor structural safety in-time, a model updating strategy with high calcula-tion speed and easy-to-convergence capacity is proposed.First, the relationship between the element stiffness and the structural responses is established by calculating the instantaneous energy.Second-ly, the instantaneous energy is substituted into the Kalman filter.The structural element real stiffness is obtained by updating according to the difference of the prediction energy and measured energy in every time step.Finally, simulation tests are carried out on a highway sign support truss in network for engineering earthquake simulation ( NEES) in the United States.The results show that without noise, the initial stiffness of the elements without damage and with 20%, 40%, 60%, 80%damage can be updated to real stiffness in 0.4 s.Even with 5% environmental noise, the updated stiffness errors obtained by this strategy are less than 12%.The time cost of CPU ( central processing unit) in every time step is far less than the sampling time.Therefore, the energy theory and Kalman filter can update the structure with unknown stiffness promptly and effectively.关键词
实时模型修正/能量原理/Kalman滤波器/损伤识别/结构健康监测Key words
in-time model updating/energy theory/Kalman filter/damage identification/structural health monitoring分类
建筑与水利引用本文复制引用
黄兴淮,徐赵东,Dyke Shirley..基于能量原理和Kalman滤波器的实时模型修正策略[J].东南大学学报（自然科学版）,2015,(3):539-543,5.基金项目
中青年科技创新领军人才资助项目、江苏省“333人才培养工程”资助项目、美国国家自然科学基金资助项目（ CNS-1035748， CNS-1035773）、东南大学优秀博士论文基金资助项目（YBJJ1207）、江苏省高校研究生科研创新计划资助项目（CXLX＿0132）． （）
