Abstract
The metal plate structure is more and more widely used in many fields, such as aerospace, high-speed railway, civil engineering, etc. In the process of long-term service, this structure is susceptible to cracks, spalling, fatigue, and other damages caused by external load impact, chemical corrosion, and other effects. A significant challenge is to find and determine the location of small damage. Aiming to address this problem, the frequency-wavenumber (f-k) domain filtering method is adopted. According to the corresponding relationship between the propagation direction of the guided wave and the frequency wavenumber matrix and combined with the characteristics of the difference in wavenumber of different modes of guided waves at the same frequency, a three-dimensional window function is constructed to realize the extraction of different modes and their corresponding damage reflection signals. The Common Source Method (CSM) time domain and f-k domain imaging methods have been used to achieve damage imaging. Finally, the data fusion imaging method has been used to weight the damage imaging results of different modes to further improve the accuracy of damage imaging.
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Acknowledgements
The author(s) disclosed receipt of the following financial support for the research, authorship, and /or publication of this article: This work was supported by the National Natural Science Foundation of China (11872191 and 12072133) and China Scholarship Fund (202008320084).
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ZW: Conceptualization, Methodology, Validation, Formal analysis, Writing—original draft, Resources, Funding acquisition. YF: Software, BL: Experiment. AZ: Data curation, Investigation. RG: English amending.
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Wang, Z., Fei, Y., Li, B. et al. Research on the f-k Domain Multimodal Damage Detection Imaging Fusion Method in Metal Plate. Trans Indian Inst Met 75, 2777–2786 (2022). https://doi.org/10.1007/s12666-022-02653-y
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DOI: https://doi.org/10.1007/s12666-022-02653-y