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High-precision coupled method for interior ballistics of gun with self-sealing band

Published online by Cambridge University Press:  15 July 2025

X. Cui Open the ORCID record for X. Cui [Opens in a new window] ,
Y. Lei ,
D. Su ,
Y. Huang  and
H. Wang
X. Cui
Affiliation:
School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing, China
Y. Lei
Affiliation:
Norinco Group Inner Mongolia North Heavy Industries Group Corp. LTD, Baotou City, Inner Mongolia Autonomous Region, China
D. Su
Affiliation:
School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing, China
Y. Huang*
Affiliation:
School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing, China
H. Wang
Affiliation:
School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing, China
*
Corresponding author: Yong Huang; Email: hy@njust.edu.cn
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Abstract

The impact of the self-sealing band on interior ballistics is investigated during the gun launching, and a high-precision interior ballistics coupling algorithm that takes leakage into account is proposed. This study focuses on a 65 mm short-barrel, equal-caliber balanced cannon, integrating Abaqus finite element software with an interior ballistics calculation programme. It uses a User-defined AMPlication Load (VUAMP) subroutine to achieve real-time coupling calculations of the chamber pressure and self-sealing band deformation, correcting variations in the chamber pressure. Experimental results show that the coupling algorithm offers the higher precision compared to traditional interior ballistics models and can effectively capture the impact of leakage on the interior ballistics performance. Further research reveals that changes in the charge amount and assembly gap significantly affect the sealing performance of the self-sealing band and the leakage of propellant gases, which in turn influence the chamber pressure and projectile velocity. The high-precision coupling algorithm proposed in this paper provides the effective theoretical support for the design of the self-sealing band and the analysis of cannon performance.

Keywords

balanced launch apparatuscoupled methodequal-caliber barrelfinite element analysisself-sealing band

Information

Type
Research Article
Information
The Aeronautical Journal , First View , pp. 1 - 26
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Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of Royal Aeronautical Society

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