| 引用本文: | 姜人伟,曾耀祥,潘忠文,等.运载火箭随机振动环境试验条件的变带宽设计方法.[J].国防科技大学学报,2022,44(6):1-5.[点击复制] |
| JIANG Renwei,ZENG Yaoxiang,PAN Zhongwen,et al.Variable-bandwidth design method of the random vibration environmental test condition for launch vehicle[J].Journal of National University of Defense Technology,2022,44(6):1-5[点击复制] |
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| 运载火箭随机振动环境试验条件的变带宽设计方法 |
| 姜人伟1,2,曾耀祥2,潘忠文2,李道奎1 |
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(1. 国防科技大学 空天科学学院, 湖南 长沙 410073;2. 中国运载火箭技术研究院 北京宇航系统工程研究所, 北京 100076)
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| 摘要: |
| 针对运载火箭随机振动环境试验条件提出了基于能量等效思想的变带宽设计方法,通过采用分数倍频程数据处理方法,并确保各个频带内的均方根值与原随机振动环境的均方根值相同,有效解决传统的等带宽随机振动环境试验条件总均方根过高的问题。为了验证所提方法的有效性,通过典型管路产品进行了随机振动响应计算。结果表明,该方法既能够有效地对产品进行考核,又不至于对产品造成过考核。所提变带宽设计方法可为运载火箭随机振动环境条件的合理设计与分析提供有效手段。 |
| 关键词: 运载火箭 随机振动环境 环境试验条件 变带宽 |
| DOI：10.11887/j.cn.202206001 |
| 投稿日期：2021-07-23 |
| 基金项目:国家自然科学基金资助项目(11902348) |
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| Variable-bandwidth design method of the random vibration environmental test condition for launch vehicle |
| JIANG Renwei1,2, ZENG Yaoxiang2, PAN Zhongwen2, LI Daokui1 |
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(1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;2. Beijing Institute of Astronautical Systems Engineering, China Academy of Launch Vehicle Technology, Beijing 100076, China)
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| Abstract: |
| A variable-bandwidth design method based on the principle of energy equivalence was proposed for the random vibration environmental test condition of launch vehicles. By adopting the fractional octave frequency band data processing method and keeping the RMS (root mean square) in every frequency band identical with the one of the original power spectral density, the exorbitant RMS problem of the traditional constant-bandwidth random vibration environmental test condition was avoided. To validate the capability of the method, the random vibration simulations of a typical pipeline were conducted. The results indicate that the method is able to assess the product effectively rather than excessively. The proposed variable-bandwidth design method offers an efficient alternative for the conditions design in the random-vibration environment test of launch vehicles. |
| Keywords: launch vehicle random vibration environment environmental test condition variable-bandwidth |
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