title: Transient analysis of leaky Lamb waves with a semi-analytical finite element method.
abstract: We previously formulated a semi-analytical finite element technique for Lamb waves in a plate surrounded by fluids and investigated the dispersion curves and wave structures for leaky Lamb waves. Herein, this technique is extended to the calculation of transient responses both in a plate and in fluids for dynamic loading on the plate surface. To gain fundamental insights into guided wave inspection for a water-filled pipe or tank, guided waves generated upon transient loading of a flat plate water-loaded on one side were analyzed. The results show that a quasi-Scholte mode propagating at the plate-water interface is useful for the long-range inspection of a water-loaded plate because of its non-attenuation and minimal dispersion; moreover, this mode has superior generation efficiency in the low-frequency range, while it is localized near the plate-water interface at higher frequencies.
authors.affiliation: Graduate School of Engineering, Kyoto University, Kyoto 615-8540, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Inoue
authors.affiliation: Graduate School of Engineering, Kyoto University, Kyoto 615-8540, Japan. Electronic address: hayashi@kuaero.kyoto-u.ac.jp.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Hayashi
keywords: Leaky Lamb waves; Non-destructive evaluation; Semi-analytical finite element method; Transient responses