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根据超声波三维地震模拟实验的结果,研究了绕射波射线轨迹的问题。对绕射波的运动学特征进行了讨论,并引用极值光程律进行了解释。实验和理论的分折指出,绕射点的位置经常按照一定的规律偏离震源——接收点联线的一侧。 本文还提出了“双曲线叠加法”,从而在实际较复杂的情况下,可以用它迅速地确定绕射点的空间位置及波的旅行时间。 文中提出绕射波的运动学特征,从中可以提供一些有关断层或绕射棱结构的情况。至于绕射波的动力学特征及机制将另文阐述。所获的结果及结论有助于物探资料的解释。
According to the result of ultrasonic three-dimensional seismic simulation experiment, the problem of the diffraction path of ray is studied. The kinematic characteristics of the diffraction wave are discussed, and the extreme light path law is explained. The experimental and theoretical analysis points out that the position of the diffraction point often deviates from the line of the source-receiver point according to a certain rule. In this paper, we also put forward a hyperbolic superposition method, which can be used to quickly determine the spatial position of the diffraction point and the travel time of the wave in a more complicated situation. In this paper, the kinematic characteristics of the diffracted waves are proposed, from which some information about the faults or diffraction edge structures can be provided. As for the dynamic characteristics and mechanism of diffraction wave will be described separately. The results and conclusions obtained help to explain the geophysical data.