Peculiarities of formulation and solving the dynamic problems of thermoelasticity

The problem of propagation spherical waves in a thermoelastic medium is considered. Two approaches to taking into account the mutual influence dynamic fields deformations and temperature are compared. A generalized model coupled thermoelasticity used for calculation first approach second one based on ratio theory thermal stresses, which neglecting change distribution under mechanical loads action. amplitude-frequency characteristics radial displacements normal tangential stresses at boundary cavity being action load, changes according harmonic law time, obtained. correspondence between value coupling parameter results error caused by use simplified field interaction traced. Wave processes solids modern polymeric materials, such as polyvinyl butyral butyralfurfural belonging family acetals, have fairly high coefficient connectivity 0.18 0.41, respectively, It shown that structure materials leads unacceptably large differences results. Thus, maximum values stress-strained state parameters obtained using were 18% higher than case application butyral. difference this two some frequencies exceeded 30% medium. concluded deformation can be rough approximation analysis reaction massive structural elements made materials.