000015261 001__ 15261 000015261 005__ 20161115100216.0 000015261 04107 $$aeng 000015261 046__ $$k2016-08-21 000015261 100__ $$aMetrikine, Andrei 000015261 24500 $$aTransition radiation in continua excited by a moving load 000015261 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers 000015261 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016 000015261 506__ $$arestricted 000015261 520__ $$2eng$$aTransition radiation is emitted when a perturbation moves along a straight line at constant velocity in or near an inhomogeneous medium. Transition radiation of elastic waves is emitted, for example, by train wheels due to track inhomogeneities. Such radiation was analyzed using several 1—D and 2—D elastic systems, but few fundamental studies focus on elastic continua. In this study, we consider a continuum consisting of two elastic layers coupled at a vertical interface. Both layers are in plane strain, have a rigid bottom, and are subject to a load that moves along the upper surface and crosses the layer interface; the upper surface is either stress free or connected to a thin flexible plate. Using semi—analytical solutions, we study the characteristics of the excited free wave fields. Results show peculiar angular distributions of the associated energy flux, which strongly depend on the load velocity and the contrast in material parameters. 000015261 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb. 000015261 653__ $$a 000015261 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016 000015261 720__ $$aMetrikine, Andrei 000015261 8560_ $$ffischerc@itam.cas.cz 000015261 8564_ $$s119189$$uhttps://invenio.itam.cas.cz/record/15261/files/TS.SM07-2.03.pdf$$yOriginal version of the author's contribution as presented on CD, page 2206, code TS.SM07-2.03 . 000015261 962__ $$r13812 000015261 980__ $$aPAPER