Vibrations of the plate with elastic core resting on the Winkler foundation caused by a moving oscillator

In the paper a structure consisting of two Kirchhoff plates connected by an elastic Winkler layer is considered. The structure rests on the Winkler foundation and is subjected to a one-mass visco-elastic oscillator, moving at a constant speed on the upper plate, parallel to one of the plate sides. Forced and free vibrations of the plates and the oscillator are analysed. In the case of such a complex system vibration of the plates is described by two coupled differential equations, or one differential equation with elevated order. In addition, due to the nature of the moving load (inertial load), these equations have variable, time-dependent coefficients. The solutions are illustrated by numerical examples.