【摘要】 用传统的傅立叶变换理论无法对爆破振动信号进行准确的时频分析,利用小波包分析所得到的良好的时频局部化性质,可以很好地对爆破地震波进行信号分解和能量分析。在阐释小波包变换基本原理的基础上,给出了爆破振动信号能量分析方法的理论解析,并结合应用实例,对爆破振动信号进行小波包能量分解,把振动信号划分为几个重要频带进行分析,据此得出不同频带上的能量分布和变化,从而确定露天采场某一特殊地形的爆破地震波衰减规律。更多还原

【Abstract】 The traditional Fourier Transform theory could hardly analyze blasting vibration signals accurately,but wavelet packet analysis with excellent time-frequency localization trait could be well deal with the blasting seismic wave,such as signal decomposition and energy analysis.Based on basic principles of wavelet packet transform theory,theoretical analysis of the blasting vibration signal energy analysis approach has been discussed.Combined with application examples,the vibration signals frequency band was divided into several important series by using wavelet packet method and obtained the energy distribution and change of every frequency band,and then determined the changes in seismic wave attenuation in a special topography.更多还原