Abstract
The dynamic characteristics of the key combined structure of helicopter and helicopter gun have an important impact on the matching between helicopter and helicopter gun. In the research process of impact load transmission, firing accuracy and reliability, the characteristics of the joint is an important factor to be considered in structural modelling, analysis and optimization. In this paper, the dynamic characteristics of the joint of the gun seat ring, bracket and trunnion are studied by combining experimental and theoretical analysis. Through the modal analysis of the structure, the natural frequencies and vibration modes of the key joint are obtained, which provides a theoretical and experimental basis for the matching of the impact load and the natural characteristics of the structure and the optimization of the impact response in the firing process of the gun.
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