【摘要】 波前快速推进法(FMM)是一种快速、准确而稳定的走时计算方法,它不仅计算速度快、灵活性好,而且对任何复杂速度场都具有无条件稳定的特点。常规的走时计算基本都是基于水平地表,这限制了方法在山区、丘陵等起伏地表地区的应用。以FMM为基础,提出了一种在复杂地质条件下计算起伏地表起伏界面地震波走时计算方法。理论模型的计算结果表明,该方法对于复杂地质条件下的走时计算是切实可行的。更多还原

【Abstract】 Fast marching method (FMM) is a fast, accurate and stable traveltime computation method. This method is flexible, fast, and unconditionally stable for arbitrarily large gradient jump in velocity. Almost all conventional methods are based on horizontal earth surface, they are unable to be applied in mountainous regions. We present a traveltime computation method suitable for rugged topography and irregular interfaces. Model data tests demonstrated the correctness of the proposed method.更多还原