基于FDM的爆破振动信号分析  

Analysis of blasting vibration signals based on FDM

作　　者：王海龙 柏皓博 赵岩 王晟华 WANG Hai-long;BAI Hao-bo;ZHAO Yan;WANG Sheng-hua(Hebei Key Laboratory of Diagnosis,Reconstruction and Anti-disaster of Civil Engineering,Zhangjiakou 075000,Hebei,China;Hebei Innovation Center of Transportation Infrastructure in Cold Region,Zhangjiakou 075000,Hebei,China;School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;North Prosperous Construction Group Co.,Ltd.,Chengde 067400,Hebei,China)

机构地区：[1]河北省土木工程诊断、改造与抗灾重点实验室,河北张家口075000 [2]河北省寒冷地区交通基础设施工程技术创新中心,河北张家口075000 [3]中国矿业大学(北京)力学与建筑工程学院,北京100083 [4]北旺集团有限公司,河北承德067400

出　　处：《工程爆破》2022年第4期7-13,24,共8页Engineering Blasting

基　　金：国家自然科学基金资助项目(51878242);河北省研究生创新基金资助项目(CXZZSS2021153)。

摘　　要：为提高爆破振动信号分析精度,针对其非平稳、非线性的特点,基于傅里叶分解理论展开研究。将爆破振动信号中有效信息分解到不同频率范围内,得到不同频率范围内爆破振动信号的细节特征。对分解所得优势分量进行重组后,进行时频分析。结果表明:经傅里叶分解处理后的重构信号在时域和频域上均具有很好的分辨率;傅里叶分解理论的应用可以避免模态混叠现象,提取指定频率区间的模态分量,提高爆破振动信号分析的准确性。In order to improve the analysis accuracy of blasting vibration signals,the research was carried out based on the Fourier decomposition theory,aiming at its non-stationary and nonlinear characteristics.The effective information in the blasting vibration signal was decomposed into different frequency ranges,and the detailed characteristics of the blasting vibration signal in different frequency ranges were obtained.After recombining the dominant components obtained from the decomposition,the time-frequency analysis was performed.The results show that the reconstructed signal after Fourier decomposition has a good resolution in both time domain and frequency domain.The application of Fourier decomposition theory can avoid modal aliasing,extract the modal components in the specified frequency range,and improve the accuracy of blasting vibration signal analysis.

关 键 词：爆破振动 振动监测 傅里叶分解 时频分析 

分 类 号：TU751.9[建筑科学—建筑技术科学] TD235[矿业工程—矿井建设]