ELASTIC WAVE PROPAGATION IN BLOCK MEDIUM UNDER IMPULSE LOADING

摘要

The waveguide properties of a block medium are studied by an example of a discrete-periodical system of spring-connected rods. As a particular case, a chain of masses is considered. It is shown that in the rod system, impulse loading excites two groups of nonstationary waves. The velocities of their propagation are determined. The asymptotic representation is obtained for low-frequency wave at a great period of time since the process onset. The analytical estimations of excitation spectrum are derived.