Energy partition and resonant excitation of poroelastic waves in the absence of dissipation

作者：Gerasik Vladimir^*; Stastna Marek

来源：Wave Motion, 2012, 49(2): 323-332.

DOI：10.1016/j.wavemoti.2011.11.006

• Porous media
• Biot%26apos
• s theory
• Lamb%26apos
• s problem
• Energy partition

Two-dimensional motion of poroelastic half-space under the action of normal harmonic driving forces is considered in the context of Blot%26apos;s theory of poroelasticity. The classical approach to the energy analysis of the wave motion in the Lamb%26apos;s problem, originally established for elastic waves (Miller %26 Pursey 1954, 1955), is applied to poroelastic waves in high-frequency regime. The total power radiated by the source is represented as a superposition of the powers transported by the four types of poroelastic waves, namely P1, P2, S and surface Rayleigh waves. The energy partition results are presented for several driving configurations to investigate the possibilities of controlling the excitation of particular wave types. While the parameter space for poroelasticity is large, two concrete situations are considered in detail, one in which the Rayleigh mode does exist and one in which it does not exist. The results are compared with, and recover in the limiting case, those known from classical elasticity theory.

• 出版日期2012-3