基于f-k变换Scholte波参数提取优化  

Optimization of Scholte Wave Parameter Extraction Based on f-k Transform

作　　者：黄洪[1] 卢旭东[1] 姜承志[1] HUANG Hong;LU Xu-dong;JIANG Cheng-zhi(Shenyang Ligong University,Shenyang Liaoning 110159)

机构地区：[1]沈阳理工大学,辽宁沈阳110159

出　　处：《数字技术与应用》2020年第6期90-91,94,共3页Digital Technology & Application

摘　　要：为提高在浅海环境下海底地震波采集效果,建立含有多种波动成分浅海声场模型,地震波包括横波、纵波、表面波即Scholte波.利用归一化法,Z-Score法对采集地震波信号预处理,得到震动幅值峰值降低,曲线更为平滑的震动曲线.理论推导和仿真数据结果表明:由Z-Score法预处理震动数据,经f-k变换得到f-k谱与归一化法预处理相比,f-k谱能量更为集中,分布更均匀,有利于Scholte波频散曲线提取.Z-Score法能提高Scholte波频散曲线提取效果.In order to improve the gathered effect of undersea seismic wave in shallow water,a shallow water acousitc field model with multiple wave components is established.Seismic wave includes shear wave,longitudinal wave and surface wave,i.e.scholte wave.By using normalization method and Z-Score method,the peak value of seismic amplitude is reduced and the seismic curve is smoother.That theoretical deduction and simulation results show that the f-k spectrum extracted by Z-Score method is more concentrared and evenly distributed than that by normalization method,which is conducive to the extaction of scholte wave dispersion curve.Z-Score method can improve the extraction effect of scholte wave dispersion curve.

关 键 词：Scholte波 预处理 Z-Score法 频散曲线 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]