Wave propagation in physical models of micromorphic media |
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| Authors: | Lothar Dresen Jan Kozák Aleš Špičák Ludvík Waniek Roman Teisseyre Reviewer A Zátopek |
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| Institution: | (1) Institute of Geophysics, Ruhr-University, Bochum;(2) Geophysical Institute, Czechosl. Acad. Sci., Prague;(3) Geophysical Institute, Pol. Acad. Sci., Warsaw |
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| Abstract: | Summary The propagation of seismic waves in a micromorphic body, which is supposed to be one of the possible models of the medium in the earthquake focus, is studied by means of the two-dimensional ultrasonic model technique. The results obtained indicate that such a medium is characterized by distinct elastic anisotropy and by increased attenuation. The propagation velocity of longitudinal waves decreases and their amplitudes change considerably. The prevailing frequency of the waves passing through the micromorphic medium tends smoothly to one value which depends on the space distribution, orientation and dimensions of the elements characterizing such a medium. The obtained results are confronted with the theory of a micromorphic medium.
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