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兵工学报 ›› 2022, Vol. 43 ›› Issue (6): 1277-1287.doi: 10.12382/bgxb.2021.0316

• 论文 • 上一篇    下一篇

火箭多级筒燃气弹射动力学特性及影响因素

潘霄1, 姜毅1, 王勃漫2, 任烨波1   

  1. (1.北京理工大学 宇航学院, 北京 100081; 2.北京电子工程总体研究所, 北京 100854)
  • 上线日期:2022-03-23
  • 通讯作者: 姜毅(1965—),男,教授,博士生导师,博士 E-mail:jy2818@163.com
  • 作者简介:潘霄(1994—), 男, 博士研究生。 E-mail: 3120160065@bit.edu.cn

Dynamics Characteristics and Influencing Factors of Multistage Canister Gas Ejection of Rockets

PAN Xiao1, JIANG Yi1, WANG Boman2, REN Yebo1   

  1. (1.Beijing Institute of Technology,School of Aerospace Engineering,Beijing 100081,China;2.Beijing Institute of Electronic System Engineering,Beijing 100854,China)
  • Online:2022-03-23

摘要: 为提高火箭弹射的性能,研究一种新型改进火箭多级筒燃气弹射装置的安全性,对其弹射过程中结构的动力学特性及发射过程中的影响因素进行比较分析。使用有限元方法对该弹射装置的弹射过程进行仿真,将弹射出的火箭位移、速度、俯仰角等结果与实验结果进行对比,验证有限元计算模型的有效性。在有限元模型基础上分析筒节间隙、推力偏心和发射角度对多级筒弹射安全性的影响。分析结果表明:发射角度是弹射安全性的主要影响因素,筒节间隙和推力偏心是次要影响因素,火箭弹射偏转、筒节间相互作用力和横向最大位移增大都是这些因素影响弹射安全性的主要表现;当活塞筒筒节间隙扩大到0.3 mm或发射角度偏转到3°时,会对发射安全性产生较大的威胁。

关键词: 火箭多级筒燃气弹射, 弹射技术, 发射动力学, 有限元

Abstract: The dynamic characteristics of a multistage canister gas ejection structure and the influencing factors during ejection are analyzed to improve the ejection performance of rockets and to study the safety of gas ejection structure. The structural composition,topological relationship and excitation load of the rocket multistage canister ejection system are analyzed,and a finite element model of the ejection system are established for simulation analysis. Through experiments,it is verified that the simulation accuracy of finite element model meets the simulation requirements. The influences of the gap of cylinder section,the thrust eccentricity and the launch angle on the safety of multistage canister gas ejection structure are analyzed based on the finite element model. It's found that the launch angle is the main influencing factor that affects the ejection safety,and the gap between the cylinder sections and the thrust eccentricity have also effect on the ejection safety. he influencing factors lead to the ejection deflection of rocket,the interaction force between the canister sections and the increase in the maximum lateral displacement. When the gap between the canister sections is increased to 0.3 mm or the launch angle is deflected to 3°,a greater threat will be posed to ejection safety.

Key words: rocketmultistagecanistergasejection, ejection, launchdynamics, finiteelement

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