Three-step Method for Stiffness Identification of Shearing Structures under Ambient Ezcitation

摘要：

Stiffness identification of shearing structures under ambient excitation is studied and a three-step method is presented. The transition from structural random response to deterministic response is realized by the natural excitation technique (NExT). The parameterdecoupled free vibration equation of shearing structures is deduced, and the equation can simplify the process of identification and reduce the amount of calculation. Through the effective combination of the NExT, the parameter-decoupled method and the extended Kalman filter (EKF) algorithm, a good scheme is presented for stiffness identification of shearing structures under ambient excitation. Using a shearing structure with six-degree-offreedom as example, the three-step method is tested by numerical simulation. The results show that the inter-story stiffness can be identified basically with accuracy, and the method can be applied in practical projects for health monitoring of shearing structures

关键词： stiffness identification shearing structures ambient ezcitation

作者: Wang Zhuo(王卓) Yan Weiming

作者单位: No.426 Mailbox, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing, 100124, PR China

会议类型: 国际会议

会议名称: 2008 National Academic Symposium for Ph. D. Candidates and Tri-University Workshop on Aero-Structural Mechanics & Aerospace Engineering(NASPCTUWMAE2008)(2008年国际航天航空工程会议暨2008年博士生学术会议(力学))

会议地点: 北京

会议语种:英文

页码: 1-5

在线出版日期: 2008-10-23（万方平台首次上网日期，不代表论文的发表时间）