地震波震源加载方式对波场特征的影响

英文篇名：The influence of loading method of seismic source on wave field characteristic
中文刊名：西北大学学报(自然科学版)
英文刊名：Journal of Northwest University(Natural Science Edition)
作者：全红娟 ; 朱光明 ; 王晋国 ; 李桂花
英文作者：QUAN Hong-juan1 ; 2 ; ZHU Guang-ming1 ; WANG Jin-guo2 ; LI Gui-hua3 (1.School of Geology Engineering and Geomatics ; Chang′an University ; Xi′an 710054 ; China ; 2.School of Science ; Chang′an University ; Xi′an 710064 ; China ; 3.College of Geological Sciences and Engineering ; Shandong University of Science and Technology ; Qingdao 266590 ; China)
中文关键词：各向异性 ; 交错网格 ; 胀缩源 ; 集中力源 ; 剪切源
英文关键词：anisotropy ; staggered-grid ; expansion source ; concentrated force source ; shear source
出版日期：2012-12-25
机构：长安大学地质与测绘工程学院;长安大学理学院;山东科技大学地质科学与工程学院;
年：2012
期：06
出版单位：西北大学学报(自然科学版)

摘要

目的地震波场数值模拟中,研究胀缩源、集中力源、剪切源在各向异性介质中引起的波场特征。方法采用MPML吸收边界,详细地分析了3种震源的加载机理,基于交错网格高阶有限差分法的波动方程进行数值模拟。结果不同震源在介质中对波场类型、偏振方向、各分量的能量分配等特征有较大的影响。结论结果对横波分裂的研究和野外观测系统的震源研究有一定的理论指导意义。
Aim In the numerical simulation of seismic wave,studying the wave field characteristics originated from expansion source,concentrated force source and shear source.Methods Using MPML absorbing boundary,analyzing in detail the loading mechanism of three kinds of source based on wave equation of straggered-grid high-order finite difference method.Results Different souce in the medium will have influence in wave type,polarization direction and energy distribution of every component,etc.Conclusion The result is constructive to study shear wave splitting and source research of field observation system.

引文

[1]董清华.震源数值模拟[J].世界地震工程,2000,16(3):27-32.
    [2]张智,刘财,邵志刚.地震勘探中的炸药药量理论与实验分析[J].地球物理学进展,2003,18(4):724-728.
    [3]成景旺,顾汉胡,徐照营.实际地层条件下爆炸震源子波模拟研究[J].工程地球物理学报,2009,6(5):529-534.
    [4]董良国,马在田,曹景忠.一阶弹性波方程交错网格高阶差分解法稳定性研究[J].地球物理学报,2000,43(6):856-864.
    [5]BERENGER J P.A perfectly matched layer for absorptionof electromagnetics waves[J].Comput Phys,1994,114:185-200.
    [6]BECACHE E,FAUQUEUX S,JOLY P.Stability of per-fectly matched layers,group velocities and anisotropicwaves[J].Comput Phys,2001,188:399-433.
    [7]MEZA F,APOSTOLOS S.A nonconvolutional,split-field,perfectly matched layer for wave propagation in iso-tropic and anisotropic elastic media:Stability analysis[J].Bulletin of the Seismological Society of Aerical,2008,98(4):1811-1836.
    [8]FRANCIS C,CHRYSOULA T.Application of the perfect-ly matched absorbing layer model to the linear elastody-namic problem in anisotropic heterogeneous media[J].Geophysics,2001,66(1):294-307.
    [9]吴国忱.各向异性介质地震波传播与成像[M].北京:中国石油大学出版社,2006.