| 引用本文: | 蒋国庆,李道奎.基于Davenport风速谱的火箭及其发射平台风致响应分析.[J].国防科技大学学报,2015,37(5):104-109.[点击复制] |
| JIANG Guoqing,LI Daokui.Wind-induced responses of a rocket and its launching platform based on Davenport wind speed spectrum[J].Journal of National University of Defense Technology,2015,37(5):104-109[点击复制] |
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| 基于Davenport风速谱的火箭及其发射平台风致响应分析 |
| 蒋国庆, 李道奎 |
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(国防科技大学 航天科学与工程学院， 湖南 长沙 410073)
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| 摘要: |
| 基于Davenport风速谱，采用M.Shinozuka法计算得到了三种不同基本风速下火箭芯级和助推器不同站点的风荷载时程样本，并调用MSC.Nastran软件对火箭及发射平台进行了瞬态响应分析，得到了停靠时不同基本风速下火箭及发射平台的位移响应。随着高度的增加，火箭芯级上各点的位移响应随之增加；不同基本风速下同一节点的最大位移之比约等于不同基本风速的平方之比。同时在脐带塔上设计了一个横拉减载结构，相同基本风速下的火箭位移响应明显减小，火箭及发射平台的抗风能力得到提高，对工程实际有较大的参考价值。 |
| 关键词: 有限元法 风致响应 减载结构 |
| DOI：10.11887/j.cn.201505016 |
| 投稿日期：2014-12-02 |
| 基金项目:国家973计划资助项目（613277） |
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| Wind-induced responses of a rocket and its launching platform based on Davenport wind speed spectrum |
| JIANG Guoqing, LI Daokui |
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(College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| On the basis of Davenport wind speed spectrum and using M.Shinozuka method, samples of wind load were numerically simulated on the different girds of rocket core and booster under three basic wind velocities. Then a transient response analysis was made to the rocket and its launching platform by invoking the MSC.Nastran, and the displacement response of the rocket and its launching platform under different basic wind velocities was obtained. The value of the displacement increases along with the increase of height away from the ground, and the ratio of the maximal displacement approximates to the ratio of the square of basic wind velocity on a grid. Finally, a designed load-relieving structure was placed on the umbilical cord tower. Results indicate that the maximal displacement on different grids decreases conspicuously and the anti-wind capability of the rocket and its launching platform are enhanced by a large margin with the help of the load-relieving structure. The designed structure can make a reference to the engineering practice. |
| Keywords: finite element method wind induced response load-relieving structure |
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