ABSTRACT

This paper studies torsional wave propagation in a poro-viscoelastic medium of finite thickness. The considered medium is clamped between an inhomogeneous poro-elastic medium of finite thickness and a poro-elastic half-space. Both finite layers are initially stressed and the half-space is self-weighted. Classical dynamical coupled theories have been used to explore the problem. Interior deformations are calculated analytically. A complex frequency equation has been obtained with the aid of suitable boundary conditions. The decomposition of the complex frequency equation into real and imaginary parts provides dispersion and damping equations. These frequency equations exhibited their reliance on the variation of attenuation coefficient, dissipation factor, inhomogeneity, initial stresses, Biot's gravity, porosity and thickness ratio parameters. The impacts of the aforesaid parameters have been extensively studied and demonstrated graphically.

摘要

本文研究扭转波在有限厚度的多孔粘弹性介质中的传播。所考虑的介质夹在有限厚度的不均匀多孔弹性介质和多孔弹性半空间之间。两个有限层最初都受到应力，半空间是自加权的。经典的动力耦合理论已被用于探索该问题。内部变形是通过分析计算的。借助合适的边界条件，得到了一个复杂的频率方程。将复频率方程分解为实部和虚部提供了色散和阻尼方程。这些频率方程表现出它们依赖于衰减系数、耗散因子、不均匀性、初始应力、Biot 重力、孔隙率和厚度比参数的变化。