物探化探计算技术2025，Vol.47Issue(2)：200-208,9.DOI:10.12474/wthtjs.20240102-0001
一种改进的相移法在面波频散曲线提取中的应用
Application of the improved phase shift method in extracting surface wave dispersion curve
摘要
Abstract
The multi-channel surface wave analysis method has been widely used in shallow velocity structure imaging.Extracting surface wave dispersion curves is one of the crucial methods for inferring underground velocity structures.However,the conventional phase-shift method has problems of low computational efficiency and resolution when dealing with the extraction of dispersion curves from deep reflection seismic data.To address these issues,this study combines the Goertzel algorithm with the phase-shift method,aiming to reduce redundant calculations and improve computational efficiency.At the same time,by optimizing the auto-power spectrum,the surface wave dispersion spectrum obtained by the phase-shift method has more concentrated energy,which improves the precision of identifying dispersion curves.The proposed enhanced phase-shift method is used to calculate theoretical model data and actual deep reflection seismic data,and the results are compared with those of the conventional phase-shift method.The research results show that the improved phase-shift method can more rapidly obtain higher-resolution dispersion spectrum maps,providing precise dispersion curves for accurately imaging underground velocity structures.关键词
Goertzel/相移法/面波/频散曲线/自功率谱Key words
Goertzel/phase shift method/surface wave/frequency dispersion curve/self-power spectrum引用本文复制引用
万志,田仁飞,刘俊杰..一种改进的相移法在面波频散曲线提取中的应用[J].物探化探计算技术,2025,47(2):200-208,9.基金项目
国家自然科学基金项目(41304080) （41304080）
