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.
出处
《振动与冲击》
EI
CSCD
北大核心
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)
关键词
电子雷管
精确延时
EEMD
能量
频率
electronic detonators
accurate delay
EEMD
energy
frequency
