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Indexed by:期刊论文

Date of Publication:2022-06-29

Journal:计算力学学报

Affiliation of Author(s):建设工程学部

Issue:4

Page Number:417-423

ISSN No.:1007-4708

Abstract: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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