Propagation behavior of homogeneous plane-P1-wave at the interface between a thermoelastic solid medium and an unsaturated porothermoelastic medium
Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, Southeast University, 211189, Nanjing, China
2 School of Civil Engineering, Southeast University, 211189, Nanjing, China
3 School of Civil Engineering, Lanzhou University of Technology, 730050, Lanzhou, China
Accepted: 3 November 2021
Published online: 19 November 2021
In the present work, the phenomenon of reflection and refraction of homogeneous plane-P1-wave is considered at the plane interface between a thermoelastic solid medium and an unsaturated porothermoelastic medium. Theoretical expressions of amplitude reflectivity/refractivity and energy ratio for all kinds of reflected/refracted waves generated by the incidence of plane-P1-wave are derived by taking into account the boundary conditions. The numerical results are obtained and used to discuss the relationship of amplitude reflectivity/refractivity and energy ratio for all kinds of reflected/refracted waves with the thermophysical parameters such as frequency, incident angle, thermal expansion coefficient and medium temperature. The results show that the amplitude reflectivity/refractivity and energy ratio for each reflected/refracted wave is affected obviously by the incident angle. The thermal expansion coefficient of the thermoelastic solid medium and the unsaturated porothermoelastic medium has different effects on the amplitude reflectivity/refractivity and energy ratio. The change of frequency and medium temperature only affects the amplitude refractivity and energy ratio of refracted P2, P3 and thermal waves and the amplitude reflectivity and energy ratio of reflected thermal wave.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021