Modeling and Simulation Method for Ejection Dynamics of Multi-stage Cylinders of Rockets

Liya WU; Mengwen CHENG; Hanping WANG

doi:10.12382/bgxb.2025.0934

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Modeling and Simulation Method for Ejection Dynamics of Multi-stage Cylinders of Rockets

更新时间：2026-02-10

- Modeling and Simulation Method for Ejection Dynamics of Multi-stage Cylinders of Rockets
- Acta Armamentarii Vol. 46, Issue S2, Pages: 250934(2025)
- 作者机构：
  
  1. 北京理工大学空天科学与技术学院, 北京 100081
  2. 北京空天技术研究所, 北京 100074
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2025.0934
  CLC：
- Received：21 October 2025，
  
  Online First：03 February 2026，
  
  Published：2025
- 稿件说明：
移动端阅览
Liya WU, Mengwen CHENG, Hanping WANG. Modeling and Simulation Method for Ejection Dynamics of Multi-stage Cylinders of Rockets[J]. Acta Armamentarii, 2025, 46(S2): 250934.
DOI：

Liya WU, Mengwen CHENG, Hanping WANG. Modeling and Simulation Method for Ejection Dynamics of Multi-stage Cylinders of Rockets[J]. Acta Armamentarii, 2025, 46(S2): 250934. DOI： 10.12382/bgxb.2025.0934.

摘要

精确高效的缓冲器建模与复现低压室内压变拓扑所产生的弹射缸应力刚化特性是提高多级缸弹射动力学仿真可靠性的关键。提出一种新型多匝并排呼啦圈式缓冲装置

结合切比雪夫迭代法构建基于弹塑性弹簧的缓冲器动力学等效模型;对比缸体不同内压状态的模态分析和轴压屈曲分析验证缸体应力刚化效应的显著;由此开发附加虚拟集中力的变拓扑空间载荷映射技术

有效模拟弹射时多级缸展开过程中低压室压强的变拓扑面加载过程

完成多级缸弹射动力学模型的构建。仿真结果表明:所构建的缓冲模型能很好地反映缓冲器承受反复冲击的力学特性

变拓扑内压加载与有无内压的动力学仿真对比结果差异显著

且变拓扑内压加载模型与试验结果高度吻合

证实了缸体的应力刚化效应对发射性能的影响不可忽视

基于附加虚拟集中力的变拓扑空间载荷映射技术与缓冲器的弹塑性弹簧等效建模是保证多级缸弹射仿真结果可靠性的必要前提。

Abstract

The accurate and efficient modeling of buffer and the reproduction of the stress stiffening characteristics of ejection cylinder generated by the pressure variable topology of low-pressure chamber are the key to improving the reliability of multi-stage cylinders ejection dynamics simulation.A new type of multi-turn side-by-side hula-hoop buffer device is proposed.A dynamic equivalent model of buffer based on the elastoplastic spring is constructed using the Chebyshev iteration method.The modal analysis and axial compression buckling analysis of cylinder under the conditions of different internal pressures are compared to verify the significant stress stiffening effect of the cylinder.Thus

a variable topology spatial load mapping technology with additional virtual concentrated force is developed to effectively simulate the variable topology surface loading process of the low-pressure chamber pressure during the deployment of multi-stage cylinders in the ejection process

and an ejection dynamics model of multi-stage cylinders is constructed.The simulated results show that the proposed buffer model can well reflect the mechanical characteristics of buffer under repeated impacts.There are significant differences in the dynamic simulation results of the variable topology internal pressure loading and the cases with and without internal pressure.Moreover

the simulated results of the variable topology internal pressure loading model is highly consistent with the experimental results

which confirms that the influence of the cylinder’s stress stiffening effect on the launch performance cannot be ignored.The variable topology spatial load mapping technology with additional virtual concentrated force and the equivalent modeling of buffer’s elastoplastic spring are the necessary prerequisites to ensure the reliability of the simulation results of multi-stage cylinders ejection.

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