地震学报（英文版）2009，Vol.22Issue(3)：223-230,8.DOI:10.1007/s11589-009-0223-y
Diffraction of plane P waves by a canyon of arbitrary shape in poroelastic half-space (Ⅱ): Numerical results and discussion
Diffraction of plane P waves by a canyon of arbitrary shape in poroelastic half-space (Ⅱ): Numerical results and discussion
摘要
Abstract
This paper investigates in detail the nature of diffraction of plane P waves around a canyon in poroelastic half-space, and studies the effects of incident frequency, drainage condition, porosity, etc, on the diffraction of waves. It is shown that the surface displacement amplitudes of the drained case are close to those of the undrained case, however, the surface displacement amplitudes of the dry case are very different from those of the saturated (either drained or undrained) cases. There are large phase shift between the dry case and the saturated cases, as well as slightly longer resultant wavelengths for the undrained case than those for the drained case and longer resultant wavelengths for the drained case than those for the dry case. For small porosity the surface displacement amplitudes for the saturated cases are almost identical to those for the dry case; while for large porosity, the effect of drainage condition becomes significant, and the surface displacement amplitudes for the undrained case are larger than those for the drained case. As the incident frequency increases, the effect of porosity becomes significant, and more significant for the undrained case than that for the drained case. As the porosity increases, the pore pressures increase significantly but their oscillations become smoother. As the incident frequency increases, the pore pressures become more complicated.关键词
poroelastic half-space/canyon/diffraction/plane P wave/surface displacement/pore pressureKey words
poroelastic half-space/canyon/diffraction/plane P wave/surface displacement/pore pressure分类
天文与地球科学引用本文复制引用
Jianwen Liang,Zhongxian Liu..Diffraction of plane P waves by a canyon of arbitrary shape in poroelastic half-space (Ⅱ): Numerical results and discussion[J].地震学报（英文版）,2009,22(3):223-230,8.基金项目
The authors gratefully acknowledge support from the Program for New Century Excellent Talents in University (NCET-05-0248) and the Key Program for Applied Basic Research of Tianjin Municipality (07JCZDJC10100). （NCET-05-0248）
