| 引用本文: | 刘财芝,唐国金.某型运载火箭地震响应分析及减震设计.[J].国防科技大学学报,2014,36(4):27-32.[点击复制] |
| LIU Caizhi,TANG Guojin.Analysis of seismic response and seismic-relieving design of a launch vehicle[J].Journal of National University of Defense Technology,2014,36(4):27-32[点击复制] |
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| 某型运载火箭地震响应分析及减震设计 |
| 刘财芝1,2, 唐国金1 |
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(1.国防科技大学 航天科学与工程学院, 湖南 长沙 410073;2.北京宇航系统工程研究所, 北京 100076)
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| 摘要: |
| 竖立状态的运载火箭一旦遭遇地震，极易造成箭体倾倒等灾难性后果。为了确保运载火箭在地震中的安全，针对某型运载火箭，采用时程分析法对其进行地震响应分析，得到了火箭的弯矩、位移响应峰值沿箭体纵向的分布规律。分析了火箭关键位置处弯矩响应的频域特性，设计了火箭的减震措施，并分析了火箭与发射台的连接刚度、隔震支座刚度对火箭地震响应的影响规律。结果表明：火箭弯矩响应的最大值发生在靠近火箭尾段的位置，位移响应的最大值发生在火箭头部位置；改变火箭与发射台连接刚度以及在发射台底部加装隔震支座的方式可以有效地减小火箭的地震响应。 |
| 关键词: 运载火箭 地震响应 时程分析 减震设计 连接刚度 基础隔震 |
| DOI：10.11887/j.cn.201404006 |
| 投稿日期：2013-11-07 |
| 基金项目:国家部委基金项目 |
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| Analysis of seismic response and seismic-relieving design of a launch vehicle |
| LIU Caizhi1,2, TANG Guojin1 |
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(1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;2.
2. Beijing Astronautics Systems Engineering Institute, Beijing 100076, China)
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| Abstract: |
| For a launch vehicle in erect status, an earthquake may bring severe consequence, such as the toppling failure of the launch vehicle. To ensure the safety of a launch vehicle during earthquake, analysis of earthquake time history response was executed. The distributions of peak moment and peak displacement in longitudinal direction of the launch vehicle were derived. Frequency-domain characteristic of moment response in key positions were researched. Seismic-relieving design was performed on the launch vehicle. Seismic response's influence disciplines of link stiffness between rocket and launcher, stiffness of isolation bearing were analyzed. The results show that: (1) the maximum of moment response occurs in tail of the launch vehicle, and the maximum of displacement response occurs in front of the launch vehicle; (2) the seismic response can be reduced significantly by changing link stiffness between rocket and launcher or equipping the launcher with isolation bearing. |
| Keywords: launch vehicle seismic response analysis of time history response seismic-relieving design stiffness of connection base-isolation |
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