爆破地震波能量分布研究  

Blasting seismic waves energy distribution based on EEMD

作　　者：徐振洋[1] 杨军[1] 陈占扬[1] 刘燕燕[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《振动与冲击》2014年第11期38-42,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金面上项目(51074028)

摘　　要：使用电子雷管精确延时逐孔起爆可使爆破振动信号主频及能量分布主频带向高频发展且分布更加均匀.利用EEMD（集合经验模态分解）算法分析振动能量分布规律,结果表明：爆破振动能量主频带出现在15～45 Hz,主频带内能量占信号总能量的80％以上;爆破振动能量在10 Hz以下频带分布仅占总能量4.5％以下,有效避免了低频振动损伤;将爆破振动能量分布主频带及能量分布比例引入建筑物安全保护进行分析,是一种有效地尝试.Blasting with electronic detonators can be used to make the main frequency band of energy distribution of blast vibration signals move towards high-frequency and the distribution trend is more even.Here,EEMD （a collection of empirical mode decomposition） was used to analyze the main frequency band of blasting vibration energy distribution.The results showed that the main frequency band of blasting vibration energy appears in the range of 15 ～ 45 Hz; blasting vibration energy distributing in the frequency range of below 10 Hz is less than 4.5％ of the total energy,the lowfrequency vibration damage was avoided effectively; introducing blasting vibration energy distribution and energy distribution proportion in frequency domain into the building safety analysis is an effective attempt.

关 键 词：电子雷管 精确延时 EEMD 能量 频率 

分 类 号：TK235.1[动力工程及工程热物理—动力机械及工程] TD235.37[矿业工程—矿井建设]