Research on Universal Flexible Cylinder Ejection

YANG Baosheng; JIANG Yi; SU Zhengyu; WANG Deng; YANG Lina

doi:10.15892/j.cnki.djzdxb.2023.01.010

Journal of Projectiles, Rockets, Missiles and Guidance >

2023 , Vol. 43 >Issue 1: 70 - 76

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2023.01.010

Research on Universal Flexible Cylinder Ejection

YANG Baosheng ,
JIANG Yi ,
SU Zhengyu ,
WANG Deng ,
YANG Lina

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School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China

Received date: 2022-07-02

Online published: 2025-02-01

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Abstract

In order to further improving the compatibility of the catapult and realize the universalization of the catapult, this study proposes a universal flexible cylinder catapult with variable interior ballistics to realize the universalization of multi-type missiles. Based on the explicit dynamic theory, the finite element model of flexible cylinder ejection loads with multi-mode missile is established, and the research of flexible cylinder ejection for multi-mode missile based on particle method is realized. In this study, the pressure vessel test simulation of particle method and computational fluid dynamics method is compared, and the simulation results is consistent, which fully verifies the correctness and reliability of particle method. The research results show that continuous ejection will affect subsequent ejection, and the velocity of the second ejection is 8.7% lower than that of the first ejection, and the ejection overload is 4.4% lower. Further research shows that changing the opening timing of the inflatable valve can change the ejection performance, and opening the inflatable valve can effectively improve the ejection speed. Sequential opening helps to reduce the peak ejection overload. Changing the opening and closing diameter of the air valve and the opening time sequence can realize the universal ejection of multi-type missiles. The difference of ejection velocity between different orders of the same type missile is less than 12%, and the response time is less than 0.02 s.

Key words： universal ejection; valve opening diameter; flexible cylinder ejection; particle method

Cite this article

YANG Baosheng , JIANG Yi , SU Zhengyu , WANG Deng , YANG Lina . Research on Universal Flexible Cylinder Ejection[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2023 , 43(1) : 70 -76 . DOI: 10.15892/j.cnki.djzdxb.2023.01.010

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