【摘要】 HHT(希尔伯特-黄变换)是一种全新而优越的分析与处理非平稳信号的时频方法,它具有自适应性强、高效等特点。它由EMD和Hilbert变换两部分组成,其Hilbert能量谱可清晰地表明能量随时频分布的特点。本文利用HHT方法分析了瓮福磷矿英坪矿区Ⅱ号坑露天爆破所获得的爆破振动数据,探讨了英坪矿Ⅱ号坑爆破振动的时频特征,为该矿下阶段安全生产提供依据。更多还原

【Abstract】 HHT(Hilbert-Huang Transform) is a brand-new and superior time-frequency method to analyze and process non-stationary signals.It has high self-adaptation and good efficiency.It consists of two parts,EMD and Hilbert.Energy spectrum of Hilbert can clearly indicate the energy distribution with time frequency.The blasting vibration data collected by open blasting of No.2 pit in Yingping Mine Area of Wengfu Phosphate Rock were analyzed with the method of HHT.Time-frequency features of blasting vibration were discussed,which provided a safe production experience for the next stage of the mine.更多还原