道面脱空检测中Rayleigh波频散曲线的提取
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摘要
瑞利波(Rayleigh波)检测具有无损、快速、经济、方便等特点,目前在地球物探等工程领域应用广泛,如何准确可靠地提取频散曲线是瑞利波勘探和损伤检测的一项关键技术。对道面脱空检测中瑞利波频散曲线的提取进行研究,通过对不同频散曲线提取方法的理论分析,并采用τ-p变换法和f-k变换法对试验数据进行处理,对比了两种方法的处理效果。结果表明:两种方法都可成功获取脱空信号,但在道面脱空检测中,f-k变换法提取频散曲线要优于τ-p变换法,对解决利用瑞利波进行道面脱空检测时的频散曲线的提取问题具有理论和应用价值。
Rayleigh wave detection, which is characteristic of being nondestructive,fast,economical,convenient,has been used widely in some engineering field such as earth exploration.The accurate extraction of dispersion curve is the key technique in Rayleigh wave exploration and damage detection.In this paper the dispersion curve extraction of Rayleigh wave in pavement void detection is studied by theoretical analysis of different dispersion curves extraction ways,and processing experimental data byτ-pconversion and f-k conversion.The comparison of the two handling methods is given and f-k conversion is better thanτ-p conversion in pavement void detection.There are theory and application benefits for dispersion curves extraction of Rayleigh wave in pavement void detection.
Rayleigh wave detection, which is characteristic of being nondestructive,fast,economical,convenient,has been used widely in some engineering field such as earth exploration.The accurate extraction of dispersion curve is the key technique in Rayleigh wave exploration and damage detection.In this paper the dispersion curve extraction of Rayleigh wave in pavement void detection is studied by theoretical analysis of different dispersion curves extraction ways,and processing experimental data byτ-pconversion and f-k conversion.The comparison of the two handling methods is given and f-k conversion is better thanτ-p conversion in pavement void detection.There are theory and application benefits for dispersion curves extraction of Rayleigh wave in pavement void detection.
引文
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[9]张碧星,鲁来玉,鲍光淑.瑞利波勘探中“之”字形频散曲线研究[J].地球物理学报2002,45(2):263-274.
[10]刘强.基于瑞利波理论的公路无损检测方法研究[D].西安:长安大学,2010.
[11]宋先海,肖柏勋,张学强,等.用改进的τ-p变换算法提取瞬态瑞利波频散曲线[J].物探与化探,2003,27(4):292-295.
[2]张波,李健君.瑞利波反射理论探讨[J].无损检测,2001,23(11):472-478.
[3]辛小春.面波新技术在工程地质勘察场地评价中的应用[J].北京水利,2003(1):25-26.
[4]杨成林.瑞利波勘探[M].北京:地质出版社,1993.
[5]严寿民.瑞利波勘探方法的应用与展望[J].地球物理学进展,1991(2):21-30.
[6]TATHAM R H,GOOLSBEE D V.Separation of Swave and P-wave reflections offshore western Florida[J].Geophysics,1984,49(5):493-508.
[7]陈淑珍,刘怀林.基于τ-P变换技术实现多波波场分离[J].煤田地质与勘探,1998,22(5):336-376.
[8]刘云祯,王振东.瞬态面波法的数据采集处理系统及应用实例[J].物探与化探,1996,20(1):28-33.
[9]张碧星,鲁来玉,鲍光淑.瑞利波勘探中“之”字形频散曲线研究[J].地球物理学报2002,45(2):263-274.
[10]刘强.基于瑞利波理论的公路无损检测方法研究[D].西安:长安大学,2010.
[11]宋先海,肖柏勋,张学强,等.用改进的τ-p变换算法提取瞬态瑞利波频散曲线[J].物探与化探,2003,27(4):292-295.