Title of article :
Fundamental solutions in antiplane elastodynamic problem for anisotropic medium under moving oscillating source
Author/Authors :
Iovane، نويسنده , , G. and Nasedkin، نويسنده , , A.V. and Passarella، نويسنده , , F.، نويسنده ,
Issue Information :
دوماهنامه با شماره پیاپی سال 2004
Abstract :
In this paper we study the antiplane problem of concentrated point force moving with constant velocity and oscillating with constant frequency in unbounded homogeneous anisotropic elastic medium.
plicit representation of the elastodynamic Greenʹs function is obtained by using Fourier integral transform techniques for all rates of source motion as a sum of the integrals over the finite interval. The dynamic and quasistatic components of the Greenʹs function are extracted. The stationary phase method is applied to derive an asymptotic approximation at the far wave field. The simple formulae for Poynting energy flux vectors for moving and fixed observers are presented too.
shown that the motion brings some differences in the far field properties, such as, for example, fast and slow waves appearance under superseismic motion and modification of the wave propagation zones and their numbers.
se of isotropic medium is considered separately. For isotropic material all main formulae are obtained in explicit forms.
Keywords :
Elastic wave , Moving source , Anisotropic solids
Journal title :
European Journal of Mechanics: A Solids
Journal title :
European Journal of Mechanics: A Solids