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| 利用多重滤波方法提取面波频散曲线 | |
| 引用本文： | 周青云,何永峰,靳平,廖桂生.利用多重滤波方法提取面波频散曲线[J].西北地震学报,2006,28(1):46-50. |
| 作者姓名： | 周青云 何永峰 靳平 廖桂生 |
| 作者单位： | 1. 西安电子科技大学,陕西,西安,710071;西北核技术研究所,陕西,西安,710024 2. 西北核技术研究所,陕西,西安,710024 3. 西安电子科技大学,陕西,西安,710071 |
| 摘 要： | 多重滤波方法已被证明在分析面波的频散特性时是一种有效而快速的方法。本文用单个台站的单次地震事件记录,应用MFT(Multiple Filter Technique)方法提取了内华达地区的面波频散曲线并分析了其特征,认为其具有大陆基振型瑞利波频散曲线的典型特征。还利用广义反透射系数法快速计算了瑞利面波频散曲线,尤其是基阶瑞利波相速度及群速度频散曲线;并且在由振型叠加方法合成的理论地震图的基础上,通过比较理论频散曲线和MFT方法得到的频散曲线,研究了多重滤波的可靠性。 |
| 关 键 词： | 瑞利波 多重滤波 群速度 频散曲线 |
| 文章编号： | 1000-0844(2006)01-0046-05 |
| 收稿时间： | 08 19 2005 12:00AM |
| 修稿时间： | 2005年8月19日 |
Using MFT Obtain Rayleigh-wave dispersion curve |
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| ZHOU?Qing-yun,HE?Yong-feng,JING?Ping and LIAO?Gui-sheng.Using MFT Obtain Rayleigh-wave dispersion curve[J].Northwestern Seismological Journal,2006,28(1):46-50. | |
| Authors: | ZHOU?Qing-yun HE?Yong-feng JING?Ping and LIAO?Gui-sheng |
| Institution: | Xidian?University;North?West?Institute?of?Nuclear?Technology;;North?West?Institute?of?Nuclear?Technology;;North?West?Institute?of?Nuclear?Technology;;Xidian?University; |
| Abstract: | Multiple filter analysis method(MFT) has been proved efficient for computing the dispersion curve of surface wave.In the article,with the data of earthquake event in Nevada area recorded by single station,MFT is used to derive the dispersion curve of Nevada area,and its characteristic are deeply analyzed.The result shows that the dispersion curves in Nevada area own the character of the dispersion curves of the typical mainland fundamental Rayleigh mode.Furthermore,theoretical dispersion curve of Rayleigh wave is calculated by generalized reflection-transmission method,and the phase velocity curve and group velocity curve of the fundamental Rayleigh mode are compared with that derived from the synthetic seismogram calculated by the modal sunnation method with MFT.Two results coincide better in the interested frequency range,showing MFT is reliable. |
| Keywords: | Rayleigh wave MFT(Multiple Filter Technique) Group velocity Dispersion curve |
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