隧道爆破作用下建筑物振动信号的小波变换时频分析  

Time-frequency Analysis Based on Wavelet Transform of Building Vibration Signal under Tunnel Blasting

作　　者：刘志斌 张胜[1] 李留玺[1] 曹鑫 Liu Zhibin;Zhang Sheng;Li Liuxi;Cao Xin(School of Civil Engineering,Hunan City University,Yiyang,Hunan 413000)

机构地区：[1]湖南城市学院土木工程学院

出　　处：《江西建材》2019年第11期120-121,123,共3页Jiangxi Building Materials

基　　金：湖南省自然科学基金资助项目（2018JJ3022）;湖南城市学院土木工程国家级实验教学示范中心大学生创新实验计划项目

摘　　要：地铁隧道爆破开挖产生的一部分能量转化为地震波,造成邻近建筑物的振动。根据连续小波变换的时频特性,将爆破荷载作用下振动信号进行连续小波变换时频分析,得到振动信号能量随时间与频率的分布规律。结果表明基于小波变换方法的爆破振动信号时频分布具有良好时频聚集性,为地铁隧道爆破网路与参数设计提供参考依据。A part of energy generated by blasting excavation of subway tunnels is converted into seismic waves, which causes the vibration of adjacent buildings. According to the time-frequency characteristics of the continuous wavelet transform, the time-frequency characteristics of vibration signals under the blasting load were analyzed by continuous wavelet transform, and the distribution law of vibration signal energy with time and frequency under blasting load was obtained. The results show that the time-frequency distribution of blasting vibration signals based on wavelet transform method has good time-frequency aggregation, which provides a reference for blasting network and parameter design of subway tunnels.

关 键 词：隧道工程 爆破振动 小波变换 时频分析 

分 类 号：U45[建筑科学—桥梁与隧道工程]