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所属单位：航空学院

发表刊物：J Intell Mater Syst Struct

摘要：The structural health monitoring system with electromechanical impedance technique is studied numerically and experimentally in this article. A three-dimensional numerical model is developed to account for the electromechanical coupling effect between the structures and the piezoelectric ceramic lead zirconate titanate transducers, and it is verified by the experimental results. The proposed numerical model and experimental method are employed to analyze piezoelectric ceramic lead zirconate titanate impedance signature of the plate with transverse crack. The modal superposition is employed to determine the harmonic response analysis frequency range. The influences of the mesh density, the dielectric constants of piezoelectric ceramic lead zirconate titanates, and the positions of piezoelectric ceramic lead zirconate titanates are considered. The effects of the length of crack and the structural damping on the piezoelectric ceramic lead zirconate titanate impedance signatures are discussed. Based on this model, electromechanical impedance signatures can be used to identify cracks in a plate specimen. The value of the harmonic response peaks is seriously affected by the material parameters of piezoelectric ceramic lead zirconate titanate and the constant damping ratio. The resonant frequency is greatly influenced by the mesh sizes and the length of cracks. © The Author(s) 2019.

ISSN号：1045-389X

是否译文：否

发表时间：2019-07-01

合写作者：Wu, Yaogang,Xiao, Zhengguang,Li, Dinghe,Xu, Jianxin

通讯作者：沈星,沈星