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| 引用本文： | 杨兆,孙和平,雷湘鄂. ������������ģ�ļ���[J]. 大地测量与地球动力学, 2007, 27(4): 38-43 |
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| 作者姓名： | 杨兆 孙和平 雷湘鄂 |
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| 作者单位： | 1. 中国科学院测量与地球物理研究所,武汉,430077;中国科学院研究生院,北京,100049
2. 中国科学院测量与地球物理研究所,武汉,430077 |
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| 基金项目： | 中国科学院百人计划项目，国家自然科学基金(40374029，40404005) |
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| 摘 要： | ??????????????????(Runge??Kutta)????????PREM??????????????????λ??????????????????????????????200 s??????????????????ε??????????????????????????????????仯???????????????о??????λ???????е?仯?????????????:??????????????????????????????仯?????, 20???????????????μ????????????Dziewonski??Anderson??????, ?????????????0.25%?????
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| 关 键 词： | ?????????? ????? ????????? PREM??? ??????? |
| 文章编号： | 1671-5942（2007）04-0038-06 |
| 修稿时间： | 2007-02-28 |
COMPUTATION OF NORMAL MODES OF TOROIDAL OSCILLATION |
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| Yang Zhao,Sun Heping,Lei Xiang'e. COMPUTATION OF NORMAL MODES OF TOROIDAL OSCILLATION[J]. Journal of Geodesy and Geodynamics, 2007, 27(4): 38-43 |
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| Authors: | Yang Zhao Sun Heping Lei Xiang'e |
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| Affiliation: | 1. InstituteofGeodesyand Geophysics,CAS, Wuhan 430077; 2. Graduate University of the Chinese Academy of Science, Beijing 100049 |
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| Abstract: | By using forth-order Runge-Kutta methods,transverse displacements and the eigenperiods larger than 200 s of toroidal oscillation are calculated for PREM(Preliminary Reference Earth Model).The features of transverse displacements are analyzed to determine the effect of density and rigidity to eigenperiods at different layers.The results compared with that from Dziewonsi and Anderson show that the relative errors between calculated periods and observed periods are less than 0.25%,and the high-order fundamental modes are mostly affected by the distribution of density and rigidity of upper mantle,the overtones which the number is more than 20 are affected mostly by lower mantle. |
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| Keywords: | earth free oscillation normal mode Runge-Kutta method PREM(Preliminary Reference Earth Model) eigenfrequency |
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