【摘要】 在前人工作的基础上对三层层状介质的瑞利波频散曲线进行了正演模拟研究,对假定的几组典型模型参数的频散曲线进行了认真分析。通过分析可知,各频散曲线之间是互不相交的,从而对此问题有了一个更清晰的认识。指出当低速软弱夹层存在时频散曲线的特点,并根据分析结果,说明"之"字形频散曲线的形成机理。更多还原

【Abstract】 The authors carried out forward modeling on dispersion curves of Rayleigh wave in three-layer media and then analyzed characteristics of dispersion curves. It is proved that the dispersion curves never intersect with each other, thus correcting the false opinions held by some scholars. When a low-velocity layer exists, the fundamental guided curve will become complex, some guided waves will assume intersection trend, and some guided waves show phenomenon of truncation in certain conditions. According to the analyzing results, the forming mechanism of the zigzag dispersion curves has also been explained.更多还原