不同段数爆破地震波的反应谱分析

为了研究段数对反应谱特性的影响,基于某石方控制爆破工程爆破振动实测数据,对不同段数爆破振动信号进行了反应谱分析。首先,利用实测的爆破振动速度信号采用直接微分法获得了加速度信号,并利用EEMD分解对加速度信号进行低通滤波去噪处理,获得了准确清晰的加速度曲线。然后,利用精确法求得了不同段数下爆破振动信号的速度反应谱和标准速度反应谱。分析结果表明:不同段数的爆破振动质点峰值速度与速度反应谱的峰值速度并不存在对应关系,因此分段数的选择应综合考虑结构对爆破振动的动态响应。

RESPONSE SPECTRUM ANALYSIS OF BLASTING SEISMIC WAVE WITH DIFFERENT SEGMENTS

In order to study the influence of different segments on response spectrum property of blasting vibration signals,based on recorded field blasting vibration data in a controlled blasting engineering,response spectrum was analyzed with different segments.Firstly,acceleration signal was obtained from field blasting vibration velocity signal by direct differential method,an accurate and clear accelerating curve was gained by using LPF(low pass filtering) de-noising processing with EEMD decomposition.Then,velocity response spectrum and standard velocity response spectrum of blasting vibration signal with different segments were given by exact method.Analysis results showed that there was no corresponding relationship between blasting vibration particle peak velocity with different segments and peak value of velocity response spectrum.Therefore,choosing a reasonable segment should synthetically consider dynamic response of blasting vibration by construction.