Effect of Inertia of Elastic Waves in Elastic Systems with Axial Symmetry

We show that a standing wave excited in an elastic circular ring behaves like a material body: if the moment of external forces directed along the symmetry axis of the ring is applied to the ring, then not only the ring itself but also the initially standing wave excited in it will come to the accelerated rotation. In this motion, this “standing wave” does not change its shape and performs accelerated precession relative to the ring. In this case, the acceleration of the wave with respect to the ring constitutes a certain fraction of the acceleration of the ring relative to the inertial space. The moment of momentum of precessing and traveling waves is calculated.