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Extended Kalman filter algorithm for non-roughness and moving damage identification.
Ding, Hong-Li; Zhang, Chun; Gao, Yu-Wei; Huang, Jin-Peng.
Afiliação
  • Ding HL; Civil Engineering and Architecture School, Nanchang University, Nanchang, People's Republic of China.
  • Zhang C; Jiangxi Institute of Economic Administrators, Nanchang, People's Republic of China.
  • Gao YW; Civil Engineering and Architecture School, Nanchang University, Nanchang, People's Republic of China. zhangchun@ncu.edu.cn.
  • Huang JP; Civil Engineering and Architecture School, Nanchang University, Nanchang, People's Republic of China.
Sci Rep ; 12(1): 21958, 2022 12 19.
Article em En | MEDLINE | ID: mdl-36536074
It is a promising method to identify structural damage using bridge dynamic response under moving vehicle excitation, but the lack of accurate information about road roughness and vehicle parameters will lead to the failure of this method. The paper proposed a step-by-step EKF damage identification method, which transforms the inversion problem of unknown structural parameters under unknown loads (vehicle and road roughness) into two separate inversion problems: moving contact force identification and damage parameters identification. Firstly, the VBI model is converted into bridge vibration model under a moving contact force, and the moving contact force covering the information of road roughness and vehicle parameters can be calculated by EKF iteration. Secondly, the moving contact force identified in the first step is loaded on the bridge as a known condition, and the bridge damage problem is also solved by the EKF method. Numerical analyses of a simply-supported bridge under the moving vehicle are conducted to investigate the accuracy and efficiency of the proposed method. Effects of the vehicle speed, the damage cases, the measurement noise, and the roughness levels on the accuracy of the identification results are investigated. The results demonstrate the proposed algorithm is efficient and robust, and the algorithm can be developed into an effective tool for structural health monitoring of bridges.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Diagnostic_studies / Prognostic_studies Idioma: En Ano de publicação: 2022 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Diagnostic_studies / Prognostic_studies Idioma: En Ano de publicação: 2022 Tipo de documento: Article