用震源扫描算法(SSA)研究列车源的运动
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摘要
用震源扫描算法(Source-Scanning Algorithm,SSA)对2004年5月山东兖州试验时地震仪记录到的列车产生的一次振动波形进行研究.结果表明,在3个短暂时间段内,我们可以清楚地看到列车运动所产生的鸟巢形波形的精细结构.通过分段分离的方法,我们得到了3张有关震源分布的图像,图像显示列车正在由NW往SE行走穿过本区.扫描结果表明,列车震源经过适当预处理可以当作许多分散的小震源来分别处理,也显示了SSA方法处理象列车这种无法识别震相的数据波形具有的潜力.
In this paper,we study the train-induced vibration recorded by seismographs during our experiment in May 2004 in Yanzhou,Shandong Province hy means of Source-Scanning Algorithm(SSA).The result shows that there are 3 clear nest-shaped fine structures made by the movement of train in three very short time periods.We get three vibration source images by piecewise separation.The images show that the train is heading forward from NW to SE when passing through this district.The example convinces us that the source of train can be dealt with as a lot of separate little vibration sources by means of some suitable pretreatment.It also shows the potentials of SSA in dealing with the data lacking seismic phases like this.
In this paper,we study the train-induced vibration recorded by seismographs during our experiment in May 2004 in Yanzhou,Shandong Province hy means of Source-Scanning Algorithm(SSA).The result shows that there are 3 clear nest-shaped fine structures made by the movement of train in three very short time periods.We get three vibration source images by piecewise separation.The images show that the train is heading forward from NW to SE when passing through this district.The example convinces us that the source of train can be dealt with as a lot of separate little vibration sources by means of some suitable pretreatment.It also shows the potentials of SSA in dealing with the data lacking seismic phases like this.
引文
[1]李丽，彭文涛，李纲等．可作为新震源的列车振动及实验研究．地球物理学报，2004，47(4)：680～684 Li L,Peng W T,Li G,et al.Vibration induced by trains:a new seismic source and relative test.Chinese J.Geophys.(in Chinese),2004,47(4):680～684
[2]陈棋福．李丽，李纲等．列车振动的地震记录信号特征．地震学报，2004，26(6)：651～659 Chen Q F,Li L,Li G,et al.Seismic features of vibration induced by train.Acta Seismologica Sinica.(in Chinese), 2004,26(6):651～659
[3]韩忠东，翟培合，杨锋杰等．列车振动震源产生地震波的采集方法及信号比较研究．中国科技信息．2006，(21)：98～102，104 Han Z D,Zhai P H,Yang F J,et al.The seismic wave gathering method and signal compare research about the source of the vibration induced by trains.China Science And Technology Information.(in Chinese),2006,(21):98～102,104
[4]李文军，陈棋福．用震源扫描算法(SSA)进行微震的定位．地震，2006，26(3)：107～115 Li W J,Chen Q F.Micro-earthquake location by means of Source-Scanning Algorithm.Earthquake(in Chinese),2006, 26(3):107～115
[5]Kao H,Shan S.The Source-seanning Algorithm:mapping the distribution of seismic sources in time and space.Geophys J Int,2004,157:589～594
[6]Kao H,Shah S,Dragert H,et al.A wide depth distribution of seismic tremors along the northern Cascadia margin. Nature,2005,436:841～844
[2]陈棋福．李丽，李纲等．列车振动的地震记录信号特征．地震学报，2004，26(6)：651～659 Chen Q F,Li L,Li G,et al.Seismic features of vibration induced by train.Acta Seismologica Sinica.(in Chinese), 2004,26(6):651～659
[3]韩忠东，翟培合，杨锋杰等．列车振动震源产生地震波的采集方法及信号比较研究．中国科技信息．2006，(21)：98～102，104 Han Z D,Zhai P H,Yang F J,et al.The seismic wave gathering method and signal compare research about the source of the vibration induced by trains.China Science And Technology Information.(in Chinese),2006,(21):98～102,104
[4]李文军，陈棋福．用震源扫描算法(SSA)进行微震的定位．地震，2006，26(3)：107～115 Li W J,Chen Q F.Micro-earthquake location by means of Source-Scanning Algorithm.Earthquake(in Chinese),2006, 26(3):107～115
[5]Kao H,Shan S.The Source-seanning Algorithm:mapping the distribution of seismic sources in time and space.Geophys J Int,2004,157:589～594
[6]Kao H,Shah S,Dragert H,et al.A wide depth distribution of seismic tremors along the northern Cascadia margin. Nature,2005,436:841～844
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