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论文类型：期刊论文

发表时间：2022-06-29

发表刊物：计算力学学报

所属单位：建设工程学部

期号：4

页面范围：417-423

ISSN号：1007-4708

摘要：The problem of sensor placement for a super high-rise building is discussed. Since the number of degree-of-freedom (DOF) of structure is large, 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 fundamental problem in analysis is how to accurately select the high-order modes. For this, a novel method computing the mode shape matrix of weak axis by simplified series multidegree-of-freedom system is developed based on the equivalent rigidity parameter identification method. The initial sensor assignment is obtained by the QR-factorization of the transpose of structural mode shape matrix. Taking the maximum off-diagonal element of the modal assurance criterion (MAC) 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 factor, the final plan of sensor placement of the building is determined.

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