Wave energy transfer in elastic half-spaces with soft interlayers.
The paper deals with guided waves generated by a surface load in a coated elastic half-space. The analysis is based on the explicit integral and asymptotic expressions derived in terms of Green's matrix and given loads for both laminate and functionally graded substrates. To perform the energy analysis, explicit expressions for the time-averaged amount of energy transferred in the time-harmonic wave field by every excited guided or body wave through horizontal planes and lateral cylindrical surfaces have been also derived. The study is focused on the peculiarities of wave energy transmission in substrates with soft interlayers that serve as internal channels for the excited guided waves. The notable features of the source energy partitioning in such media are the domination of a single emerging mode in each consecutive frequency subrange and the appearance of reverse energy fluxes at certain frequencies. These effects as well as modal and spatial distribution of the wave energy coming from the source into the substructure are numerically analyzed and discussed.
Institute for Mathematics, Mechanics and Informatics, Kuban State University, Krasnodar 350040, Russia.
Evgeny
E
Glushkov
Institute for Mathematics, Mechanics and Informatics, Kuban State University, Krasnodar 350040, Russia.
Natalia
N
Glushkova
Institute for Mathematics, Mechanics and Informatics, Kuban State University, Krasnodar 350040, Russia.
Sergey
S
Fomenko