Construction of Reflective and Refractive Wave Fronts Due to a Line Source in Anisotropic Elastic Media

• Main Authors: Yu-Ting Huang, 黃渝婷
• Other Authors: 吳光鐘
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/24594292110734636264

碩士 === 國立臺灣大學 === 應用力學研究所 === 98 === A method to deal with the two dimensional wave propagation problem, and to construct the reflective and refractive wave fronts of a line source in anisotropic elastic media is developed in this thesis. The basic theory of this method is to use the generalized Snell’s Law which describes that the apparent wave speed always remains unchanged before or after reflection (refraction). Using this law to trace the energy velocity vectors. And the values of them could be solved from a six-dimensional eigenvalue problem and be presented by the combination of eigenvalue p and its differential. The energy velocity vector is relative to the wavefront curve. The problems being solved in this thesis are horizontal, inclined, rectangular, and circular geometric boundary. Primarily construct the first and the second reflective and refractive wave fronts.