坝基开挖爆破振动频带小波能量分析  

Wavelet Energy Analysis of Blasting Vibration Frequency Band on Dam Foundation Excavation

作　　者：费鸿禄[1] 马诺诺[1] 

机构地区：[1]辽宁工程技术大学爆破技术研究院,阜新123000

出　　处：《爆破》2010年第3期99-104,共6页Blasting

基　　金：国家自然科学基金资助项目(50774042);辽宁省高等学校优秀人才支持计划(2009R32);辽宁省教育厅项目(2009A341)

摘　　要：结合蒲石河蓄能电站下水库坝基开挖爆破振动监测数据,运用小波分析方法,对爆破振动信号进行小波多层分解,获得各频带PPV及爆破振动分量的小波频带能量,通过分析比较,得出此次爆破振动信号的能量在频域上分布较广泛,但绝大部分能量集中在0～200 Hz,在传播过程中能量迅速衰减;小波频带能量可以反映爆破振动信号强度、频率和作用时间;并指出爆破振动出现的多子频、多峰值揭示了只采用单个主振频带来代替整个频域,有欠准确,在未来的研究中应将多主频的影响因素考虑进去。The blasting vibration signals based on monitoring dam foundation excavation blasting of Pushihe storage station were carries out the multilevel wavelet decomposition and got PPV and wavelet frequency band energy of every band through wavelet analysis.Through analysis and comparison,the energy distribution of this blasting vibration signal was wide in the frequency domain,but the vast majority energy concentrates in the range of 0～200 Hz and attenuating quickly during propagating.The wavelet frequency band energy can reflect vibration strenght,frequency and time.And it is not enough that using only a single frequency take the place of the whole frequency domain.So we should consider impact of multiple factors of frequency in future studies.

关 键 词：小波变换 频带 小波频带能量 PPV 

分 类 号：O382.2[理学—流体力学]