摘要
为分析不同爆破条件下振动信号的频带能量分布特征,文章选择满足分析要求的基坑开挖爆破振动信号,对其进行小波包分析。研究结果表明:随着爆心距的增加,振动信号的总能量不断衰减,能量峰值逐渐降低,频带能量分布更加分散,并且其主振频带宽度有增大的趋势;随着最大段药量的增加,振动信号能量峰值对应的频率逐渐降低,能量分布向中低频带集中,主振频带宽度有减小的趋势。
In order to analyze the frequency band energy distribution characteristics of vibration signals under different blasting conditions, the vibration signals of foundation pit excavation blasting that meet the analysis requirements are selected and analyzed by wavelet packet. The results show that the total energy of the vibration signal decreases with the increase of the explosion center distance, the energy peak decreases gradually, the frequency band energy distribution is more dispersed, and the frequency band width of the main shock tends to increase;with the increase of the maximum charge, the frequency corresponding to the energy peak of the vibration signal gradually decreases, the energy distribution concentrates to the medium and low frequency band, and the main shock frequency band width tends to decrease.
作者
何梦
诸洲
李贺龙
He Meng;Zhu Zhou;Li Helong(China Nuclear Huachen Construction Co.,Ltd.,Xi'an 712000,China;College of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)
出处
《江苏科技信息》
2022年第8期33-37,共5页
Jiangsu Science and Technology Information
基金
中核集团科研创新项目,项目编号:FWHT-20-0002。
关键词
爆破振动
小波包分析
能量分布
频率特征
blasting vibration
wavelet packet analysis
energy distribution
frequency characteristics
