Abstract: In this paper, the authors study the first type of reflection problem of thermoelastic wave. Based on two kinds of basic forms of thermoelastic wave, the solution of the first type of straight reflection and the first type of diagonal reflection is obtained. The results show that the reflection coefficient and the refraction coefficient of thermoelastic wave depend on the medium property and the wave frequency, the complex reflection coefficient and the complex refraction coefficient of thermoelastic wave make its phase of two sides of the interface and the additional temperature field abruptly variable.

Key words: Thermoelastic wave, Reflection coefficient, Refraction coefficient, Abruptly variable