Optimal Sensor Placement for Dalian World Trade Building
Deciding on an optimal sensor placement is a common problem encountered in many engineering applications and is a critical issue in the construction and implementation of an effective structural health monitoring system. In this paper, an initial three- dimensional finite element model for the Dalian World Trade building was established using ETABS software. Since the number of degree-of-freedom of the structure is too much, multi-modes should be selected to describe the dynamic behavior of a structural system with sufficient accuracy to allow its health state to be determined effectively. A difficult problem in analysis is how to accurately select the translational and torsional modes. For this, a new method computing the mode shape matrix of weak axis by simplified series multidegree-of-freedom system is presented based on the equivalent rigidity parameter identification method. The initial sensor assignment is obtained by the QR-factorization of the structural mode shape matrix. Taking the maximum off-diagonal element of the modal, assurance criterion matrix as a target function, adds one more sensor each time until the maximum off-diagonal element of MAC reaches the threshold. Considering the economic factors, the final plan of sensor placement is determined.
Optimal Sensor Placement (OSP) Finite Element Method (FEM) Modal Assurance Criterion (MAC) Series of multidegree-of freedom High-rise building
Hongnan Li Tinghua Yi Guoxin Wang
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Ganjingzi District, Dalian 116024, China
国际会议
南京
英文
146-151
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）