摘要
介绍了瑞利波平面及轴对称分析方法,这两种方法对数值模拟场地信号、实测频散曲线及研究各阶振型瑞利波频散曲线十分重要。用二维傅里叶变换或多次滤波,在一定程度上可将信号中瑞利波不同振型分离,得到不同振型频散曲线,而用相位差或互相关分析方法得到的频散曲线可认为是各阶振型瑞利波频散曲线加权平均。瑞利波频散曲线与半无限体分层介质力学参数有关,通过对频散曲线正、反分析可得到各层介质力学参数。此外,还介绍了瑞利波在地下目的物探测中的应用。
Both of planar and axisymmetric methods for Rayleigh wave analysis are introduced. These methods are very useful for simulating testing signals and dispersion curves and studying higher Rayleigh wave modes. Rayleigh wave modes of the signals can be separated and the dispersions of various modes can be obtained by 2Fourier transformation or multiple filter/cross-correlation technique. The dispersion obtained by phaseunwrapped technique can be regarded as an average of weighted dispersion of various modes. The variation of dispersion is related to mechanic parameters of layered media,and the parameters can be obtained by forward or back analysis. Moreover,the application of Rayleigh wave into detecting of underground obstacles is described.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2002年第1期119-125,共7页
Chinese Journal of Rock Mechanics and Engineering
关键词
瑞利波
振型
频散曲线
相位差
道距
偏移距
Rayleigh wave,mode,dispersion curves,phase-difference,distance between receivers,distance between source and the first receiver
