【摘要】 为研究复杂地质条件对瑞雷面波频散曲线的影响,采用有限差分地震数值模拟方法,对3种模型进行正演模拟,得出了某一时刻的波场快照与单炮记录。对模拟记录进行频散分析的结果表明:单层均匀介质没有频散现象;起伏地表两层均匀介质的频散曲线相速度只和介质本身的参数有关,不受地形的影响;水平地表含软夹层介质中,瑞雷波频散现象非常明显。更多还原

【Abstract】 In order to study the influence of complicated geological conditions on frequency dispersion curves of Rayleigh surface wave,the paper,using finite difference seismic numeric modeling,carried out forward modeling on three models,obtained wave field snapshot and single shot record at certain time.Analysis of frequency dispersion of modeled record showed that there was no frequency dispersion in single layer homogeneous medium,phase velocity of frequency dispersion curves in double layer homogeneous media on relief surface was only related to the para-meters of media themselves,and was not influenced by topography,in media with interbedded soft layer in flat surface,frequency dispersion of Rayleigh wave was very evident.更多还原