COMPUTATION OF ACOUSTIC FIELD ON 2D FRONTS PART 1. TRAJECTORIES

摘要

Traditional methods of wave field computation include modes, rays and parabolic approximation. This report presents description of new approach, based on computation of wave fronts and corresponding phases and amplitudes of the field on them. Final result can be interpreted as sum of ray-like arrivals, computed while running fronts intersect receiver location, and contain arrival times and angles. Introduction of involutes of the wave fronts clarify the structure of the field. Examples of application of this method are presented.