Travel times and ray paths for acoustic and elastic waves in generally anisotropic media

• DOI: 10.1016/j.jcp.2023.112500
• Publication Date: 2023-09-17T13:23:59Z
• Authors: James Ludlam; Katherine Tant; Victorita Dolean; Andrew Curtis
• Keywords: Geometrical acoustics

Wavefield travel time tomography is used for a variety of purposes in acoustics, geophysics and non-destructive testing. Since the problem non-linear, assessing uncertainty results requires many forward evaluations. It therefore important that evaluation times ray paths efficient, which challenging generally anisotropic media. Given computed field, tracing can be performed to obtain fastest path from any point medium source field. These rays then speed up gradient based inversion methods. We present modeller calculating fields by localised estimation wavefronts, novel approach through those fields. methods have been tested complex weld give comparable obtained using finite element modelling while being computationally cheaper.