It is a kind of to mix computational methods when two-dimensionally seismic wave is walked

摘要

Computational methods when two-dimensionally seismic wave is walked the invention discloses a kind of mixing, comprise the following steps：Read in relevant parameter, rate pattern；Ray is sent to different directions and calculate central ray information along focus；The seimic travel time of radiation range internal net point is calculated using wavefront construction method；Attribute is classified and establishes initial narrow band on this basis when being walked to total space mesh point；Remaining mesh point seimic travel time is calculated using fast-marching algorithm.By the present invention in that it is connected to fast-marching algorithm and wavefront construction method with narrow-band technologies, the seimic travel time computational accuracy of smaller area near focus is improved by wavefront construction method, so as to improving computational accuracy of the fast-marching algorithm in remaining area grid node, realize when a kind of two-dimensionally seismic wave for taking into account computational efficiency and computational accuracy is walked and calculate.