【摘要】 为研究不同微差间隔下爆破振动信号的反应谱特性,基于金堆城露天矿现场爆破振动试验数据,对不同微差间隔的两孔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微差间隔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:加速度峰值小的振动信号其速度反应谱峰值可能较大,不同微差间隔的爆破振动信号标准速度反应谱峰值对应的结构自振周期不同。因此可认为,降振合理微差的选择应结合爆破振动与建筑物的动态响应综合考虑。更多还原

【Abstract】 In order to study the response spectrum property of basting vibration signals with different microsecond delay time,basing on monitored data on field blasting vibration in Jinduicheng open pit,the response spectrum analysis was done of two holes blasting vibration with different microsecond delay time.Firstly,the acceleration signal was obtained by direct differentiation method using monitored of VOD signal,the accurate and clear accelerating curve was gained by LPF(low pass filtering) De-noising processing using EEMD decomposition.Then,the velocity response spectrum and the standard velocity response spectrum of basting vibration signal with different microsecond delay time are given by exact methods.Analysis results show that the peak value of velocity response spectrum maybe larger the signals with less acceleration peak;the standard velocity response spectrum of blasting vibration signal with different microsecond delay time corresponded different natural vibration period.Therefore,it can be considered that choosing of reasonable delay time should comprehensive consider blasting vibration and dynamic response of construction.更多还原