Guided Wave Dispersion Curves Derived with a Semianalytical Finite Element Method and Its Applications to Nondestructive Inspection
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概要
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In guided wave inspection, dispersion curves and wave structures are indispensable for designing inspection tools and analyzing waveforms. This report describes solutions of the dispersion curves and wave structures with a semi-analytical finite element method and discusses the applications of the dispersion curves and wave structures in guided wave inspection. Formularization of the semi-analytical finite element method revealed that external dynamic loading should be distributed in a shape similar to the wave structure of the desired mode and enabled the analysis of excitation potentials of desired modes with an angle beam transducer. Using a semi-analytical finite element analysis, guided wave tools for inspecting bottom-edges of rails were developed and gave good results for practical use.
- 2008-05-25
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