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单段爆破振动信号是爆破振动信号的基本组成部分,对于单段爆破振动信号的分析可以更加全面地揭示爆破振动信号的时频特性,基于小波分解的单段爆破振动信号RSPWVD二次型时频分析,可获取单段爆破振动信号在不同频段内能量随时间、频率的分布规律。结合实测的单段爆破振动信号分析表明:单段爆破振动信号的频率成分比较单一,能量主要集中在7.812 5~62.5 Hz;低频部分的持续时间较长,高频部分的持续时间较短,125~500 Hz的频带的持续时间仅为20 ms。
Single-stage blasting vibration signal is the basic component of blasting vibration signal. The analysis of single-stage blasting vibration signal can reveal the time-frequency characteristics of blasting vibration signal more comprehensively. The single-stage blasting vibration signal RSPWVD quadratic time-frequency Analysis, you can get single-band blasting vibration signal in different frequency bands with time, frequency distribution. Combined with the measured single-segment blasting vibration signal analysis, it is shown that the single-stage blasting vibration signal has a single frequency component, with the energy mainly concentrated in 7.812 5 ~ 62.5 Hz; the duration of the low frequency part is relatively long; the duration of the high frequency part is short; The duration of the ~ 500 Hz band is only 20 ms.