Pendulum-type waves. Part II: Experimental methods and main results of physical modeling

Conclusions 1. Investigations of physical modeling of pulsed actions on models of block media (with different material composition and characteristic dimensions of the subblocks) by energy-calibrated impacts confirmed the hypothesis expressed earlier by the authors about the possibility of existence of pendulum-type waves, the elementary carriers of which are geoblocks of a different scale level (-waves).2. An analysis of the regularities of formation of the spectra of the wave packets and graphs of the absolute displacements of the blocks, determined by the optical method, permitted concluding a resonance mechanism of occurrence of -waves, underlying which is the canonical relationship of the spectral modes for wave packets with respect to factor (2)ⁱ, i=0, ±1, ±2, ±3, ... .3. The effect of the condition of canonical relationship of the spectrum in wave packets of -waves under certain conditions of energy actions can leads to the occurrence of the effect of anomalously low friction between interacting blocks (carriers of -waves) in directions orthogonal to the line of action of the external pulse.The work was performed with the financial support of the Russian basic research fund (grant No. 96-05-66052).Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 3–39, July–August, 1996.