基于小波分析场地波速测量方法.pdf

27 1 Vol. 27, No. 1 2007 2 JOURNAL OF EARTHQUAKE ENGINEERING AND ENG INEERING V IBRATION Feb. 2007 : 2007) 0101 90 陈旭庚, 田家勇, 王恩福, 张国宏, 赵国存, 谢周敏 (, 10008 ) : , PS , , P S , , , PS : ; ; ; : P31 . 3; TN911. 7 : A W avevelocity logging based on wavelet analy sis Chen Xugeng, T ian Jiayong, W ang Enfu, Zhang Guohong, Zhao Guocun, X ie Zhoum in ( Institute ofCrustal Dynam ics, China E arthquake Adm inistration, Beijing 10008 , China) Abs tract: It is difficu lt to identify the arrival tmi es ofP and Sw aves in w ave velocity logging, wh ich yields great er ror of P and S w ave velocities. W e present a new method for the calculation of w ave velocities based on w avelet analysis. Peak values of w avelettransformed signal represent the arrival of elastic w avesw ith the group velocities, w hich makes the calcu lation ofw ave velocities accurate and reliable. Furthermore, the dispersive characteristic of w aves is also shown by waveletmethod. An illustrative example show s that this method can determ ine the accurate P and S w ave velocities. K ey w ord s: w ave velocity; arrival tmi e; w avelet transform; peak value , [ 1, 2] , , , , [ 3] , , , , PS : 2006- 0 - 10; : 2006- 07- 20 : ( 106020 3); : ( 1978- ), , , , . 160 27 , P S , [ 4] S , , , , , , T ian, [ ] T ian, PS , PS ,