摘要
根据爆破振动信号具有明显的持时短、突变快等特点,结合露天台阶爆破振动监测资料,利用小波包分析良好的时频局部化性质,研究了爆破振动信号不同频带的能量分布规律,分析了爆破振动信号的能量在传播过程中随着起爆方式改变的变化规律。研究结果表明:爆破振动信号的频带能量分布与起爆方式密切相关;该方法对综合研究露天台阶爆破振动危害机理和爆破地震效应,特别是从频率角度研究爆区附近建(构)筑物的安全提供了一种有效的分析手段。
According to the distinct characteristics of blast vibration signal, the laws of energy distribution for blast vibration signals in different bands were investigated by using wavelet packet analysis technique which has high resolvability and localization. The results shows that the energy distribution for different frequency bands has close relation to detonation ways. This method is effective for studying the mechanism of surface bench blasting vibration damage and blast seismic effect,specially for studying the safety of constructions around the blasting area from point of frequency.
出处
《爆破》
CSCD
2008年第2期21-25,共5页
Blasting
关键词
起爆方式
台阶爆破
爆破振动
小波包分析
能量分布
detonation ways
bench blasting
blast vibration
wavelet packet analysis
energy distribution
