不同段数爆破地震波的反应谱分析
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
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。
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.
引文
(1)凌同华,李夕兵,王桂尧.爆破震动灾害主动控制方法研究[J].岩土力学,2007,28(7):1439-1442.
    (2)赵明生,张建华,易长平.基于单段波形叠加的爆破振动信号时频分析[J].煤炭学报,2010,35(8):1279-1282.
    (3)张丹.爆源因素对爆破地震强度分布特征的试验研究[D].成都:西南交通大学,2007.
    (4)冯万慧.大型土石方爆破无限分段起爆网路技术研究[J].工程爆破,2009,(15)1:38-40.
    (5)李夕兵,凌同华.爆炸参量对爆破地震反应谱的影响[J].爆炸与冲击,2004,24(5):443-447.
    (6)唐鸿卿,吴新霞.频率对爆破地震反应谱的影响[J].爆破,2008,25(4):17-19.
    (7)丁刚德,王伟策,陈小波.微差爆破的爆破地震反应谱分析[J].爆破,1997,14(3):24-30.
    (8)张晓志,谢礼立,于海英.地震动反应谱的数值计算精度和相关问题[J].地震工程与工程振动,2004,(6):15~26.
    (9)中村小一郎.科学计算引论:基于MATLAB的数值分析[M].梁恒,刘晓艳,译.北京:电子工业出版社,2002.
    (10)WU Zhao-hua,HUANG E.Ensemble Empirical ModeDecomposition-A Noise-Assisted Data Analysis Method[R].Calverton:Center for Ocean-Land-AtmosphereStudies,2005.
    (11)曹冲锋,杨世锡,杨将新.大型旋转机械非平稳振动信号的EEMD降噪方法[J].振动与冲击,2009,28(9):33-39.
    (12)赵明生,张亚文,徐海波,等.不同微差间隔下爆破振动信号的反应谱分析[J].爆破,2010,28(1):28-32.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心