Resumo

GUPTA, Asit Kumar  e  PATRA, Pulak. Influence of gravity on torsional surface waves in a dissipative medium. Geofís. Intl [online]. 2021, vol.60, n.1, pp.1-13.  Epub 31-Jan-2022. ISSN 2954-436X.  https://doi.org/10.22201/igeof.00167169p.2021.60.1.1916.

The present paper deals with the possibilities of propagation of torsional surface waves in a viscoelastic medium under gravity field. During the study it may observe that the increase in gravity parameter will increase the velocity of the wave whereas the increase in viscoelastic parameter, decrease the velocity of the wave till the product of angular frequency and viscoelastic parameter is less than unity. It may also observe that as the velocity increases, the curve becomes asymptotic in nature when the time period of oscillation increases. In fact the maximum damping in velocity has also been identified at this cut off point which may be considered as the point where a viscoelastic material becomes a viscous medium. The absorption coefficients have also been calculated for different values of viscoelastic parameter and gravity field. The study may reveals that viscoelastic half space in the absence of gravity field does not allow torsional surface waves whereas in presence of gravity field the waves are propagates and is damped.

Palavras-chave : Torsional surface wave; visco-elastic medium; gravity; absorption coefficient.

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