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Guided wave propagation in H‐beam and probability‐based damage localization
Author(s) -
Li Fucai,
Li Hongguang,
Qiu Jianxi,
Meng Guang
Publication year - 2017
Publication title -
structural control and health monitoring
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.587
H-Index - 62
eISSN - 1545-2263
pISSN - 1545-2255
DOI - 10.1002/stc.1916
Subject(s) - structural health monitoring , beam (structure) , guided wave testing , excitation , acoustics , identification (biology) , process (computing) , lamb waves , structural engineering , wave propagation , computer science , materials science , engineering , optics , physics , electrical engineering , botany , biology , operating system
Summary H‐beams are usually made of structural steel and are widely used in construction, civil, and mechanical engineering. Both the rolling process and complex working condition can yield some defects on the H‐beam structures. Characteristics of guided wave propagation in H‐beam are investigated in this study for damage identification by using guided wave‐based structural health monitoring (SHM) technique. Wave structures are obtained for wave mode selection in H‐beam SHM applications. Guided waves are excited by using piezoelectric actuators. Two excitation ways, that is, symmetric excitation and circle excitation, are studied to select appropriate wave mode for damage identification. Based on the wave propagation characteristics, probability‐based diagnostic image method is proposed to estimate locations of simulated defects. In the image reconstruction process, arithmetic average‐based and geometric average‐based methods are investigated for damage localization with high precision. The results demonstrate that guided wave‐based SHM technique is applicable to damage identification for H‐beam structures. Copyright © 2016 John Wiley & Sons, Ltd.