爆心距对爆破振动信号频带能量分布的影响

英文篇名：Influence of Distance from Blasting Center on Frequency Bands Energy Distribution of Blasting Vibration Signals
中文刊名：重庆建筑大学学报
英文刊名：Journal of Chongqing Jianzhu University
作者：凌同华 ; 李夕兵 ; 王桂尧 ; 陈文胜
英文作者：LING Tong-hua 1 ; 2 ; LI Xi-bing 2 ; WANG Gui-yao 1 ; CHEN Wen-sheng 1(1.School of Bridge and Structural Engineering ; Changsha University of Science and Technology ; Changsha 410083 ; China ; 2.School of Resources and Safety Engineering ; Central South University ; Changsha 410083 ; China)
中文关键词：爆破振动 ; 能量分布 ; 小波包分析 ; 非平稳信号 ; 爆心距
英文关键词：blast vibration ; energy distribution ; wavelet packet analysis ; non-stationary random signal ; distance from blasting center
出版日期：2007-04-15
机构：长沙理工大学桥梁与结构工程学院,中南大学资源与安全工程学院,长沙理工大学桥梁与结构工程学院,长沙理工大学桥梁与结构工程学院湖南长沙410076,中南大学资源与安全工程学院,湖南长沙410083,湖南长沙410083,湖南长沙410076,湖南长沙410076
年：2007
期：02
出版单位：重庆建筑大学学报

摘要

根据爆破振动信号具有短时非平稳的特点,利用小波包分析技术对满足分析要求的多段微差爆破振动信号的能量分布特征进行研究。首先,简略地介绍了小波变换与小波包分析的特点。其次,基于MATLAB对爆破振动信号进行小波包分析,得到了爆破振动信号在不同频带上的能量分布图。最后,总结了爆破振动信号频带能量的分布规律,重点探讨了爆心距对爆破振动信号频带能量分布的影响。结果表明,爆破震动信号在传播过程中,其主振频带有往低频发展的趋势,且宽度增加。
Based on the character of short-time non-stationary random signal,the feature of energy distribution of multi-interval-time in millisecond blast signals was investigated by means of the wavelet packet method.Firstly,the characters of wavelet transform and wavelet packet analysis were introduced.Secondly,three single deck blast vibration signals were analyzed by wavelet packet based on software MATLAB and the change of energy distribution curve at different frequency bands was obtained.Finally,the law of energy distribution of single deck blast vibration signals was analyzed and the influence of distance from blasting center on frequency bands energy distribution of blasting vibration signals was principally explored.The results show that the dominant frequency bands of blast vibration signals tend to be low,and its frequency band becomes wider.

引文

[1]李洪涛,舒大强.爆破震动衰减规律的影响因素(J).《武汉大学学报》(工学版),2005,38(1):79-82.
    [2]李宏男,王丙乾,林皋.爆破地震效应若干问题的研究(J).爆炸与冲击,1996,16(1):61-67.
    [3]李洪涛,舒大强.爆破震动衰减规律的影响因素(J).《武汉大学学报》(工学版),2005,38(1):79-82
    [4]Guowei Ma,Hong Hao,Yingxin Zhou.Assessment ofstructure damage to blasting induced(J).EngineeringStructures,2000,(22):1 378-1 389
    [5]Charles K Chui.An introduction to wavelets(M).NewYork:Academic Press,Inc.1992:297-333.
    [6]胡昌华,张军波.基于MATLAB的系统分析与设计——小波分析(M).西安:西安电子科技大学,2000:265-266.
    [7]王宏禹.非平稳随机信号分析与处理(M).北京:国防工业出版社,1999:12-20.
    [8]林大超,施惠基,白春华等.爆炸地震效应的时频分析(J).爆炸与冲击,2003,23(1):31-36.
    [9]凌同华,李夕兵.用时-能密度法确定微差爆破中的实际延迟时间(J).岩石力学与工程学报,2004,23(13):2 266-2 270.
    [10]凌同华,李夕兵.基于小波变换的时-能密度分析法优选微差延期时间(J).重庆建筑大学学报,2006,28(2):36-39.