Effect of surface stress on magneto-elastic surface waves in finitely conducting media

Czasopismo : Acta Geophysica
Tytuł artykułu : Effect of surface stress on magneto-elastic surface waves in finitely conducting media

Autorzy :
Błęcki, J.
Space Research Centre, Polish Academy of Sciences, Warszawa, Poland, jblecki@cbk.waw.pl,
Chukwuma, V.U.
Department of Physics, Olabisi Onabanjo University, Ago-Iwoye, Nigeria, victorchukwuma@yahoo.com,
Krankowski, A.
Institute of Geodesy, University of Warmia and Mazury in Olsztyn, Poland, kand@uwm.edu.pl,
Abdullah, M.
Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia, mardina@eng.ukm.my,
Zakharenkova, I.E.
West Department of IZMIRAN, Kaliningrad, Russia, zakharenkova@mail.ru,
Teisseyre, K.P.
Institute of Geophysics, Polish Academy of Sciences, Warszawa, Poland, kt@igf.edu.pl,
Acharya, D.P.
Ex Principal, Bangabasi Morning College, Kolkata, India, acharyadp-05@rediffmail.com,
Abstrakty : This paper deals with the investigation of the effect of surface stress and conductivity on the propagation of surface wave in isotropic, homogeneous, elastic media under the action of a primary magnetic field. Formulation of the general surface wave propagation problem has been made, and the corresponding frequency equation has been derived. Frequency equations for Rayleigh wave, surface shear wave and Stoneley wave have been deduced from that of general surface wave as special cases. The effects of surface stress and magnetic field on the wave velocities and attenuation factors of Rayleigh wave and surface shear wave are shown by numerical calculations and graphs. Some important wave velocity equations, as ob-tained by other authors, have been deduced as special cases from the wave velocity equation for Stoneley wave. It is found that the combined effect of surface stress and magnetic field modulates the wave velocity ratios and attenuation factors of Rayleigh wave and surface shear wave to a considerable extent.

Słowa kluczowe : surface stress, magneto-elastic surface waves, magnetic field, Rayleigh waves, surface shear waves, Stoneley waves,
Wydawnictwo : Instytut Geofizyki PAN
Rocznik : 2007
Numer : Vol. 55, no. 4
Strony : 554 – 576
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Cytuj : Błęcki, J. ,Chukwuma, V.U. ,Krankowski, A. ,Abdullah, M. ,Zakharenkova, I.E. ,Teisseyre, K.P. ,Acharya, D.P. , Effect of surface stress on magneto-elastic surface waves in finitely conducting media. Acta Geophysica Vol. 55, no. 4/2007