隧道爆破振动与机车振动信号时频特征差异化分析  

The Difference of Time-frequency Characteristic Analysis between Tunnel Blasting Vibration and Locomotive Vibration Signal

作　　者：付晓强[1] 陈程[1] 陈帅志 史国利[1] 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《科学技术与工程》2017年第15期191-195,共5页Science Technology and Engineering

基　　金：国家自然科学基金面上项目(51274203)资助

摘　　要：采用频率切片小波变换对复线新建隧道爆破振动与既有隧道机车振动信号进行了分析。在获取两种信号波形和频谱曲线的基础上,利用FSWT对两种信号进行了时频分析。然后根据其逆变换能切割任意频率区间的特点,对两种信号进行子频带划分并得到重构信号;并对两类信号不同的能量分布特性进行了对比研究。研究结果表明:爆破振动信号和机车振动信号的能量主要都分布于200 Hz区域内;在0~100 Hz范围内,机车振动信号所占能量相对较大;100 Hz以上频率区域,爆破振动信号所占能量比例更大。爆破振动信号相对于机车振动信号而言,属于更加高宽频的非平稳随机振动。Based on the frequency slice wavelet transform （ FSWT） methods, new tunnel blasting vibration in double track tunnels and the existing tunnel locomotive vibration signals are analyzed. On the basis of acquiring two kinds of signal waveform and spectrum curve, the time frequency analysis of two kinds of signals is carried out by using FSWT. Then,according to the characteristics of the invert transform can cut any frequency range, two kinds of signals are divided into sub bands and the reconstructed signal is obtained, energy distribution characteristics of the two kinds of signals are compared and studied. The results show that the energy of blasting vibration signal and locomotive vibration signal are mainly distributed in the 200 Hz region. In the range of 0-100 Hz,the energy per-cent ratio of locomotive vibration signal is relatively larger, and the region of 100 Hz above, the energy percent ratio blasting vibration signal is more larger. Compared with the locomotive vibration signal, the blasting vibration signal belongs to a more high frequency non-stationary random vibration.

关 键 词：隧道施工 爆破振动 机车振动 能量分布 

分 类 号：TD235.14[矿业工程—矿井建设]