| 虚拟质量法在运载火箭模态分析中的应用 |
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| 引用本文： | 崔高伟,洪良友,张冬梅.虚拟质量法在运载火箭模态分析中的应用[J].强度与环境,2013(5):43-47. |
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| 作者姓名： | 崔高伟 洪良友 张冬梅 |
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| 作者单位： | 北京强度环境研究所,北京100076 |
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| 摘 要： | 针对液体燃料对火箭结构的模态影响，提出采用虚拟质量法进行模态分析。首先建立了一个贮箱模型，分析了液体对结构模态的影响；然后利用该方法对一个带有液体推进剂的助推器进行了模态分析，并与集中质量法计算结果进行了比较。计算结果显示，采用虚拟质量法计算时由于液体的存在结构的频率会降低，而且虚拟质量法和集中质量法在模拟液体推进剂对结构横向一阶频率的影响时有较好的一致性，结果证明虚拟质量法作为一种模态分析方法可以为设计人员提供参考。
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| 关 键 词： | 火箭助推器 虚拟质量 模态分析 |
The application of virtual mass method in modal analysis of the rocket |
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| CUI Gaowei,HONG Liangyou,ZHANG Dongmei.The application of virtual mass method in modal analysis of the rocket[J].Structure & Environment Engineering,2013(5):43-47. |
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| Authors: | CUI Gaowei HONG Liangyou ZHANG Dongmei |
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| Institution: | ( Beijing Institute of Structure and Environment Engineering ,Beijing 100076,China) |
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| Abstract: | Accounting for the effect of fluid to the modal of the rocket , the virtual mass method is applied in the modal analysis of rocket booster . First, the finite element model of tank filled with water is presented for the modal analysis using virtual mass method. Then, the modal analysis of rocket booster filled with some fuel is investigated and the comparison with lumped mass method is examined. The conclusion is that the frequency of the structure filled with fluid will decreased and the virtual mass method is successful in modal analysis for the structure filled with fluid. |
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| Keywords: | rocket booster virtual mass modal analysis |
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