| 考虑推进剂晃动的火箭液固耦合分析的比拟算法 |
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| 引用本文： | 朱昶帆,唐国安,张美艳. 考虑推进剂晃动的火箭液固耦合分析的比拟算法[J]. 动力学与控制学报, 2014, 12(3): 239-242 |
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| 作者姓名： | 朱昶帆 唐国安 张美艳 |
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| 作者单位： | 复旦大学力学与工程科学系,上海 200433;复旦大学力学与工程科学系,上海 200433;复旦大学力学与工程科学系,上海 200433 |
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| 基金项目： | 国家自然科学基金资助项目(11202052) |
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| 摘 要： | 对于弹性容器与不可压无黏液体之间的线性耦合问题,已有缩聚对称形式的液固耦合系统有限元方程.利用比拟算法获得液固耦合系统的系统矩阵,将问题转化为通用有限元程序可以解决的问题.以包含贮箱的火箭模型为例,求解火箭的模态特性,其中包括由液体晃动所引起的火箭振动模态.结果表明此类模态与重力加速度有关,频率随重力加速度的增大而增大.
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| 关 键 词： | 液固耦合 贮箱 有限元方法 比拟 |
The analogy method to coupling analysis of rockets considering propellant sloshing |
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| Zhu Changfan,Tang Guoan and Zhang Meiyan. The analogy method to coupling analysis of rockets considering propellant sloshing[J]. Journal of Dynamics and Control, 2014, 12(3): 239-242 |
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| Authors: | Zhu Changfan Tang Guoan Zhang Meiyan |
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| Affiliation: | Zhu Changfan Tang Guoan Zhang Meiyan(1 Department of Mechanics ＆ Engineering Science, Fudan University, Shanghai 200433, China；2. Shanghai Key Laboratory of Space Aerocrafi Mechanism, Shanghai 201108, China ) |
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| Abstract: | For the linear coupling of the elastic tank and incompressible and invisid liquid, there are reduced and symmetric finite element equations of coupling system. The system matrix could be obtained by the analogy method, and then the analysis of coupling system will turn to be a problem that could be solved by the general finite element software. For example, the modal characteristics of the rocket with tanks were studied. Coupling modes caused by liquid sloshing were founded, and the result shows the modes of this kind are relevant to the gravity acceleration. In addition, the greater the gravity, the higher the frequency. |
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| Keywords: | fluid-structure interaction tank finite element method analogy |
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