摘要
为了深入研究爆破振动信号的特征,应用小波变换方法对具有短时非平稳特点的爆破震动信号进行了特征分析。结合连云港田湾核电站3、4号机组扩建爆破施工实例,进行数据采集和分析。根据小波变换的时-频特性和分层分解展开关系。将爆破震动时间历史信号用分层重构信号进行扫描,分析这些信号得到了不同频率带上爆破震动的相对能量分布和振动强度的时间变化规律。爆破震动信号实测结果分析表明:基于小波变化的能量分布特征分析可以更准确的给出爆破震动信号的信息。
In order to study the characteristics of blasting vibration signals, the wavelet transform method was used to analyze the characteristics of the blasting vibration signal with short time and non stationary characteristics. Combining with the example of expansion blasting construction of Lianyungang Tianwan Nuclear Power Plant Unit 3 and Unit 4, the data was collected and analyzed. The blasting vibration signal was decomposed according to the time- frequency characteristics of wavelet transform and hierarchical. The blasting vibration time history signal was scaned by hierarchical reconstruction signal, by analysing these signals, the time variation of blasting vibration in different frequency bands with energy distribution and vibration intensity were obstained. The analysis results show that the en- ergy distribution characteristic analysis based on wavelet transform provided more accurate details of the blasting vi- bration signal.
出处
《爆破》
CSCD
北大核心
2015年第3期85-90,共6页
Blasting
关键词
爆破振动信号
小波变换方法
短时非平稳
相对能量分布
blasting vibration signals
wavelet transform method
short-time non-stationary
relative energydistribution
