【摘要】 将二维线性走时插值射线追踪算法(LTI)推广应用至三维模型,并结合网格界面剖分方式,提出了一种三维射线追踪算法.该算法既可获得高精度的全局最小走时和射线路径,又具有快速稳定的特点.三维模型计算结果表明,在模型参数包括网格密度完全相同情况下,本文算法较传统的三维最短路径算法在计算效率、走时和射线的计算精度上均有明显改进.更多还原

【Abstract】 In the paper a new three-dimensional seismic ray tracing method is put forward, which is derived from the improvement of two-dimensional seismic ray tracing algorithm based on linear travel-time interpolation and partition of grid interface. This method inherits the advantage of not only the high accuracy of the minimum travel-times and ray paths but also the high calculation speed associated with partition of grid interface. The calculating results on some threedimensional models demonstrate that, compared to the traditional three-dimensional shortest path ray tracing algorithm, the speed of this new three-dimensional seismic ray tracing calculation and the accuracy of the minimum travel-times and ray paths are greatly improved.更多还原