| 关于中尺度对称运动的稳定性及其演变 |
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| 引用本文： | 罗德海.关于中尺度对称运动的稳定性及其演变[J].成都信息工程学院学报,1992(4). |
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| 作者姓名： | 罗德海 |
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| 作者单位： | 成都气象学院科研所 |
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| 摘 要： | 本文首先建立了中尺度对称运动的Hamihon函数,并用变分原理导出了对称运动稳定的充分条件,然后再用Lagrange变分导出了缓变介质中对称运动的波作用量方程,这种波作用量方程与用WKB方法所得到的结果是相同的。同时,本文进一步讨论了中尺度对称扰动渡包的演变规律,并获得了对称运动发展的判据。
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| 关 键 词： | 对称运动 稳定性 Hamilton函数 Lagrange变分 波作用量方程 |
ON THE STABILITY AN EVOLUTION OF SYMMETRIC MOTIONS |
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| Luo Dehai.ON THE STABILITY AN EVOLUTION OF SYMMETRIC MOTIONS[J].Journal of Chengdu University of Information Technology,1992(4). |
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| Authors: | Luo Dehai |
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| Abstract: | In this paper,the Hamiltonian function of meso-scale symmetric motion is constructed.and the sufficient conditions of symmetric motion is derived with the application of variational principle. Furthermore,the wave action equation of symmetric motion in the slowly varing media is obtained by using Lagrange mean variation, which is consistent with that obtained by the WKB method. On the other hand,the evolution of meso-scale symmetric motion wave -packt is discussed in detail and some results are obtained too. |
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| Keywords: | Symmetric motion Stability Hamilton function Lngrange variation Wave action equation |
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