Journal Article

Application of a mode-superposition method for obtaining a dynamic response of the barrel to the shot pressure excitation

Piasta, K, Fikus, B, Michalski, J, Kupidura, P

2025

Overview

In this study, we explore the application of the mode superposition method for obtaining the dynamic response of a barrel to shot pressure excitation. This method is used to effectively analyze the vibrational behaviour of the barrel when subjected to the transient forces generated during firing. By decomposing the barrel’s response into a series of mode shapes, the complex dynamic interaction between shot pressure and the barrel structure is simplified, allowing for a more efficient and accurate computational process. The study provides a detailed examination of the influence of the dynamic response on bullet dispersion. Experimental validation is carried out through a series of tests on a representative barrel, with the results demonstrating a high correlation between the predicted and observed dynamic responses. This approach not only enhances understanding of barrel dynamics under shot pressure but also offers a valuable tool for the design and optimizing of ammunition, with the goal of improving performance while mitigating adverse vibrational effects. The findings suggest that the mode-superposition method is a robust and reliable technique for dynamic analysis in ballistics engineering.

• Publisher: IOP Publishing
• Subject: Ballistics / Design optimization / Dynamic response / Excitation / Mode superposition method