【摘要】 爆破振动信号是一种极为复杂的非平稳信号,具有持时短、突变快的特点,本文结合实际爆破监测数据,利用小波包变化提取信号的频带能量分布特征,对爆破振动信号中不同频带的能量特征进行了分析研究。研究结果表明:爆破振动信号能量绝大部分集中在0～200Hz,在这一频带根据爆破条件不同其能量又分布于不同子频带。随着爆破药量、爆破地震波传播距离的增大,低频带所占能量不断增加。因此该方法对爆破地震波传播及破坏机理,以及爆破降振研究是一种有效的方法。更多还原

【Abstract】 Blasting vibration signals is a very complex non-stationary signal,with the characters of short duration and abrupt change.The different frequency bands energy features of blasting vibration signals from blasting engineering were decomposed and analyzed by wavelet packet method in this paper.The results show that most of blasting vibration signal energy concentrated in the frequency band of 0～200Hz,the frequency band can be divided into many sub-band when the blast conditions changed.With the explosive dose and blasting seismic wave propagation distance increases,the low frequency band energy of blasting vibration signals increase.This method is effective for studying the blasting seismic wave propagation mechanism,specially,for reducing vibration of blasting.更多还原