基于双参数匹配追踪算法的不同孔深爆炸地震波特性研究  

Characteristics analysis of explosion seismic waves with different hole depth based on the method of double parameters matching pursuit

作　　者：周辉[1] 龙源[1] 钟明寿[1] 谢兴博[1] 郭涛[1] 

机构地区：[1]解放军理工大学野战工程学院,南京210007

出　　处：《振动与冲击》2016年第18期76-81,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51304218;51178460)

摘　　要：利用爆炸地震波信号的非平稳随机特性,对其进行Hilbert变换转换成复数信号,获得爆炸地震波信号瞬时频率和相位双参数。使用双参数匹配追踪(Matching Pursuits)算法分解爆炸地震波信号,有效提高了匹配追踪(MP)算法的扫描效率,降低算法复杂度,较传统过完备匹配追踪算法运算速率明显提高;结合维格纳瑞利分布(Wigner Ville Distribution,WVD)分析了不同孔深的爆炸地震波时频特性,有效消除了WVD交叉干扰项的影响。分析结果表明:在一定深度范围内,孔深增加,爆炸地震波能量增大,但高频能量衰减更严重;当孔深超过一定深度时,爆炸地震波高频能量衰减趋于稳定。Taking advantage of the non-stationary random nature of explosion seismic signals,and using the Hilbert transformation to covert the signal into a plurality signal,the two parameters,namely the instantaneous frequency and phase parameter of the signal were acquired. The method of double parameter matching pursuit was introduced to decompose explosion seismic wave signals. The scan efficiency of the matching pursuit（ MP） algorithm,the complexity of the algorithm,and the operation rate of the algorithm were effectively improved compared with the ordinary complete matching pursuit algorithm. With resorting to the Wigner Ville distribution,in which the influence of its cross interference terms was effectively eliminated,the time-frequency characteristics of the explosion seismic waves with different hole depth were analysed. The results show that： in a certain depth range,with the increase of hole depth,the energy of the seismic wave is increased,while the attenuation of the explosion seismic wave energy of high frequency also becomes more intense. When the hole depth is over a certain value,the attenuation of the explosion seismic wave energy of high frequency remains at a stable level.

关 键 词：双参数 匹配追踪 维格纳瑞利分布 孔深 爆炸地震波 

分 类 号：TB236[一般工业技术—工程设计测绘]