| 李强,于存贵,秦予铮.基于气囊缓冲的某火箭炮着陆冲击分析[J].装备环境工程,2019,16(11):90-94. LI Qiang,YU Cun-gui,QIN Yu-zheng.Landing Impact Analysis of a Rocket Launcher Based on Airbag Buffering[J].Equipment Environmental Engineering,2019,16(11):90-94. |
| 基于气囊缓冲的某火箭炮着陆冲击分析 |
| Landing Impact Analysis of a Rocket Launcher Based on Airbag Buffering |
| 投稿时间：2019-04-11 修订日期：2019-05-28 |
| DOI：10.7643/issn.1672-9242.2019.11.017 |
| 中文关键词: 火箭炮 缓冲气囊 冲击 有限元法 数值模拟 |
| 英文关键词:rocket launcher buffer airbag impact finite element method numerical simulation |
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| 中文摘要: |
| 目的 减小火箭弹着陆冲击加速度。方法 基于LS-DYNA瞬态动力学分析软件和冲击动力学理论，采用有限元软件HYPERMESH建立火箭炮-气囊系统有限元模型，采用显式动力学方法对火箭炮-气囊系统的着陆冲击缓冲过程进行仿真。分析火箭炮在正常着陆工况下，火箭弹的着陆冲击响应，得出空投装备速度、加速度变化曲线,以及气囊的体积、压力曲线。结果 在正常着陆工况下，火箭弹横向加速度的最大值为122 m/s2，小于安全的横向加速度；火箭弹纵向加速度的最大值为48.3 m/s2，小于安全的纵向加速度；火箭弹的最大轴向力为2640 N，小于安全闭锁力。结论 在火箭炮着陆冲击过程中，气囊缓冲装置吸收了大部分冲击能量，起到了良好的缓冲作用，火箭弹的冲击加速度、闭锁力均在安全范围内。采用显式动力学方法对火箭炮的着陆冲击过程进行分析是可行的。 |
| 英文摘要: |
| Objective To reduce rocket projectile impact landing acceleration. Methods Based on LS-DYNA transient dynamics analysis software and impact dynamics theory, the finite element model of rocket launcher-airbag system was established by using finite element software HYPERMESH. The explicit dynamics method was used to simulate the landing shock & buffer process of rocket launcher-airbag system. The rocket projectile's landing impact response was analyzed under normal landing conditions. The speed & acceleration curve of the airdrop equipment and the volume & pressure curves of the airbag were obtained. Results Under normal landing conditions, the maximum lateral acceleration of the rocket projectile was 122 m/s2, which was less than the safe lateral acceleration; the maximum longitudinal acceleration of the rocket projectile was 48.3 m/s2, which was less than the safe longitudinal acceleration; and the maximum axial force of the rocket projectile was 2640 N, which was less than the safe blocking force. Conclusion During the impact of the rocket launcher, the airbag buffering device absorbs most of the impact energy and plays an important role in buffering. The impact acceleration and blocking force of the rocket projectile are all within the safe range. It is feasible to analyze the landing impact process of rocket launchers by explicit dynamics. |
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