基于频率-贝塞尔变换方法的城市浅层勘探研究  

Research on Shallow Urban Exploration Based on Frequency-Bessel Transform Method

作　　者：王顺 廖武林[1,2,3] 李井冈 张丽芬[1,2,3] 周紫岩 WANG Shun;LIAO Wulin;LI Jinggang;ZHANG Lifen;ZHOU Ziyan(Institute of Seismology,CEA,40 Hongshance Road,Wuhan 430071,China;Key Laboratory of Earthquake Geodesy,CEA,40 Hongshance Road,Wuhan 430071,China;Hubei Earthquake Agency,48 Hongshance Road,Wuhan 430071,China)

机构地区：[1]中国地震局地震研究所,武汉市430071 [2]中国地震局地震大地测量重点实验室,武汉市430071 [3]湖北省地震局,武汉市430071

出　　处：《大地测量与地球动力学》2025年第3期273-278,共6页Journal of Geodesy and Geodynamics

基　　金：中国地震局地震研究所和应急管理部国家自然灾害防治研究院基本科研业务费(IS202336344,IS201926299);国家自然科学基金(42174177,62106239);中国长江三峡集团有限公司科研项目(0799275);湖北省创新团体项目(2021CFA035)。

摘　　要：在同一场地分别采用T型、直线型、正五边型和螺旋型4种不同观测台阵进行微动探测对比实验,分析互相关分段时间窗口长度、观测台阵几何形状及其展布对频率-贝塞尔(F-J)频散能量成像质量的影响。结果表明,对于相同时间长度的观测,增加互相关分段时间窗口长度能有效区分基阶和高阶频散曲线,但会减少叠加次数,降低频散谱分辨率;F-J方法对观测台阵排列无特别要求,随机分布、线性排列等均适用,在台阵口径相同的情况下,拥有更多台间距组合的观测台阵的频散成像质量和分辨率会更高;F-J方法对观测台阵的展布范围有一定要求,当展布范围过小时,F-J方法频散成像质量较差,无法分离高阶频散曲线。We use T-shaped,linear,regular pentagonal,and spiral arrays at the same site for micromotion detection comparison experiments to analyze the effects of cross-correlation time window length,geometry of observation array,and their spreading on the quality of frequency-Bessel(F-J)dispersion energy imaging.The results indicate that,for the same observation time,increasing the cross-correlation time window length can effectively distinguish the fundamental and higher-mode dispersion curves,but it will reduce the number of superposition segments,resulting in lower dispersion spectrum resolution.The F-J method does not have special requirements for the arrangement of observation array and is suitable for random and linear distributions.When the array aperture is the same,the quality and resolution of dispersion imaging for an observation array with a greater number of array spacing combinations will be higher.The F-J method has certain requirements for the deployment range of observation array.For example,when the deployment range is too small,the quality of dispersion imaging using the F-J method is poor and it is unable to separate higher-mode dispersion curves.

关 键 词：微动 基阶面波 高阶面波 频率-贝塞尔变换方法(F-J) 台阵观测 

分 类 号：P315[天文地球—地震学]