摘要
在减震沟两侧相邻区域内布设五个测点,对爆破震动试验展开监测。采用小波包能量谱分析法对采集的爆破振动信号进行分析,得到地震波经过减震沟的能量变化情况及各个测点的能量分布。试验与分析结果表明,减震沟对爆破地震波能量具有有效的衰减作用,但在沟后一定距离上存在能量放大现象;减震沟对初始能量主要分布在中高频的信号具有降频作用,对初始能量主要分布在低频的信号具有升频作用。
A blasting vibration test was monitored by laying 5 measurement points at both sides nearby a damping ditch. The collected signals were inspected with the method of wavelet packet energy spectrum analysis. The energy variation of blasting seismic wave and the energy distribution at each measurement point were obtained. The results of test and analysis show that the energy of blasting seismic wave is effectively attenuated by the damping ditch, whereas energy magnification appears at a certain distance behind the damping ditch. The damping ditch decreases the frequency bands of the signal whose original energy is distributed in high or intermediate frequency bands, and increases the frequency bands of the signal whose original energy is distributed in low frequency bands.
出处
《振动与冲击》
EI
CSCD
北大核心
2012年第13期113-118,共6页
Journal of Vibration and Shock
关键词
能量
减震沟
爆破震动
小波包
energy
damping ditch
blasting vibration
wavelet packet
