Vibration reduction and firing accuracy improvement by natural frequency optimization of a machine gun system

다국어 초록 (Multilingual Abstract)

Structure vibration is known to influence the firing accuracy of a machine gun system. Studying the dynamic characteristics of the machinegun system and reducing its vibration response are crucial. Eigenfrequency optimization based on topology is an emerging vibrationsuppression technique that reduces structural vibration and stabilizes a machine gun system. This paper presents an effective andefficient method that accomplishes these tasks. The objective function is the frequency of the main vibration mode confirmed by modaland transient dynamic analyses. The frequency is maximized by subjecting topology optimization to mass constraints. Based on topologyoptimization results, the revised model addresses all structural and manufacturability concerns. Dynamic analysis, exterior ballistics calculation,and experimental test are conducted to verify the effectiveness of the proposed method. Results show that muzzle vibration andstructure deformation are reduced and firing accuracy is remarkably improved.

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