基于平滑伪Wigner-Ville分布信号重排的爆破振动信号分析研究
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摘要
简单介绍了重排时频分布,包括Cohen类分布的重排和Affine类分布的重排。并选择属于重排Cohen类分布的平滑伪Wigner-Ville分布重排对地下和露天爆破振动信号的时频特征进行对比分析,得出了它们之间的不同之处和相似之处,以便采取更加合理的措施来减小爆破振动的危害,从而保护地下工程和露天工程设施的安全稳定性。
The reassigned time-frequency distribution was introduced simply,including Cohen-reassigned and Affine-reassigned distribution.Reassigned smoothed pseudo Wigner-Ville distribution belonging to Cohen-reassigned distribution was selected to compare the time-frequency characteristics of the underground engineering and open-pit blasting vibration signals.The difference and similarity between them were found out,so that reasonable measures would be used to reduce the damage of blasting vibration to protect the safety and stability of the underground engineering and open-pit engineering facilities.
The reassigned time-frequency distribution was introduced simply,including Cohen-reassigned and Affine-reassigned distribution.Reassigned smoothed pseudo Wigner-Ville distribution belonging to Cohen-reassigned distribution was selected to compare the time-frequency characteristics of the underground engineering and open-pit blasting vibration signals.The difference and similarity between them were found out,so that reasonable measures would be used to reduce the damage of blasting vibration to protect the safety and stability of the underground engineering and open-pit engineering facilities.
引文
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[2]史秀志,陈寿如.爆破振动信号时频特征的微差时间效应[J].湖南科技大学学报(自然科学版),2008,23(3):10~13.
[3]林大超.施惠基,白春华等.爆炸地震效应的时频分析[J].爆炸与冲击,2003,23(1):31~35.
[4]娄建武等.人工模拟爆破震动信号及其频谱特性检验[J].工程爆破,2001,7(1),7~11.
[5]宋熙太.爆炸震动中的频谱实例及初步规律[C].防护工程学术交流会文选.1995,7,27.
[6]张志呈.浅谈评价爆破地震效应的方法和标准[J].爆破器材,1998,27(3),32~34.
[7]郭学彬等.爆破地震波的频谱特性研究[J].化工矿物与加工,1999,7,18~20.
[8]史秀志.爆破振动信号时频分析与爆破振动预测研究[D].中南大学博士学位论文.长沙:中南大学,2007.
[9]Auger F,Flandrin P.Improving the readability of time-frequencyand time-scale representations by the reassignment method.IEEETrans.Signal Processing,1995,43,1068~1089.