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本文以模型地震学中普遍采用的二维地震模型的理论为基础,建立了一个有15种不同厚度的二维高速夹层地震模型。对不同厚度的平界面高速夹层产生的首波性质,进行了较详细的观测和讨论。实验结果表明:首波的形成、速度、能量和频谱都与高速夹层的厚度有关。实验结果还表明:在二维情况下,首波沿高速层界面传播时可以深入高速层半个首波波长。
Based on the theory of two-dimensional seismic model commonly used in model seismology, this paper established a two-dimensional high-speed mezzanine seismic model with 15 different thicknesses. The first wave properties of high-speed interlayer with different thicknesses are discussed and discussed in detail. The experimental results show that the formation, velocity, energy and frequency of the first wave are related to the thickness of high-speed interlayer. The experimental results also show that in the two-dimensional case, the first wave propagates along the interface of the high-velocity layer and can penetrate into the half wave length of the high-velocity layer.