基于功率谱的爆破地震能量分析方法  

An energy analysis method for blast-induced seismic based on power spectrum

作　　者：李洪涛[1] 卢文波[2] 舒大强[2] 杨兴国[1] 

机构地区：[1]四川大学水利水电学院,四川成都610065 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《爆炸与冲击》2009年第5期492-496,共5页Explosion and Shock Waves

基　　金：国家自然科学基金重点项目(50539100);教育部博士点新教师基金项目(200806101039);四川省科技支撑计划(2008SZ0232)

摘　　要：针对爆破振动频度-能量分布的定量分析问题,提出了一种基于功率谱的能量分析方法。功率谱密度表征了一定频率谐波分量能量的相对大小,以此为出发点,推导出可以表征爆破振动频度-能量分布的计算方法,结合工程实例的分析结果表明,利用该方法可以实现爆破振动频率构成的定量分析。同时将该方法与目前通用的小波变换能量分析方法作了比较,两者的原理是一致的,但基于功率谱的能量分析方法直接利用频谱分析完成从时域到频域的转化,因此分析过程简便,物理意义明确,更容易理解和掌握。In order to study features of energy distribution for blasting vibration signals,an energy analysis method for blast-induced seismic based on power spectrum is put forward.In some extent,power spectrum density can be regarded as the characterization of relative size of the energy of a certain frequency harmonic.Then a method for calculating the energy-frequency distribution of blasting vibration is derived.Example analysis shows that this method is effective.And the comparative analysis shows that the principle of this method is consistent with the method based on wavelet transform.The method based on power spectrum achieves the transformation from time domain to frequency domain by using spectral analysis.So this method is simple in operation,quite clear in physical meaning,and it can be understood easily

关 键 词：爆炸力学 能量分析 功率谱 爆破地震 

分 类 号：O382[理学—流体力学] TD235.1[理学—力学]