| Rayleigh面波各阶模式频散曲线对横波速度和层厚的敏感性探讨 |
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| 引用本文： | 张明财,熊章强,张大洲,刘白璐.Rayleigh面波各阶模式频散曲线对横波速度和层厚的敏感性探讨[J].物探化探计算技术,2011,33(2):153-158. |
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| 作者姓名： | 张明财 熊章强 张大洲 刘白璐 |
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| 作者单位： | 中南大学,信息物理工程学院,湖南,长沙,410083 |
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| 基金项目： | "十一五"国家科技支撑项目 |
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| 摘 要： | Rayleigh面波勘探的目的在于有效利用频散曲线反演地层厚度及横波速度,而不同模式的频散曲线对横波速度和层厚的敏感性不同。通过求取介质参数变化10%后与参数不变化时的二组频散曲线的差值,得到各阶模式的频率～相速度差曲线,分析了Rayleigh面波各模式频散曲线对横波速度、层厚的敏感性。试验结果表明,基阶模式对于浅层的横波速度和层厚比较敏感,敏感区域主要集中在较窄的频带范围内。而高阶模式对于相对较深层的横波速度和层厚比较敏感,且频率范围分布较大,敏感性强的频段分布比较分散。研究结果可以为Rayleigh面波多模式联合反演提供理论依据。
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| 关 键 词： | Rayleigh面波频散曲线 横波速度 层厚 敏感性 |
Discussion on the sensitivity of each mode dispersion curves Rayleigh wave with the shear wave velocity and depth of stratum |
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| ZHANG Ming-cai,XIONG Zhang-qiang,ZHANG Da-zhou,et al..Discussion on the sensitivity of each mode dispersion curves Rayleigh wave with the shear wave velocity and depth of stratum[J].Computing Techniques For Geophysical and Geochemical Exploration,2011,33(2):153-158. |
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| Authors: | ZHANG Ming-cai XIONG Zhang-qiang ZHANG Da-zhou |
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| Institution: | ZHANG Ming-cai,XIONG Zhang-qiang,ZHANG Da-zhou,et al. (School of Info-physics and Geomatics Engineering,Central South University,Changsha 410083,China). |
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| Abstract: | The exploration of Rayleigh surface wave aimed at effectively using dispersion curves to inverse the shear wave velocity and depth of stratum, but sensitivity of each mode with the shear wave velocity and depth of stratum are different. Frequency-phase velocity difference curve of each mode is obtained by subtracting the dispersion curve from the dispersion curve with one of the media parameter 10% changed.The sensitivity of each mode of Rayleigh wave with the shear wave velocity and depth of stratum of eve... |
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| Keywords: | dispersion curve of rayleigh wave shear wave velocity depth of stratum sensitivity |
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