Mechanical Mechanism Analysis on Failure About the Cartridge Leaving Bore Ahead of the Revolver Cannon
To uncover the cause of the cartridge prematurely leaving the bore of a revolver cannon,we employed a hydrodynamics model to analyze the variation of pressure inside the breech during the rota-tion of the breechblock.Additionally,we introduced numerical simulations of the shell extraction process based on an elastic-plastic finite element method to analyze the relevant shell extraction resis-tance,extraction speed,and stress-strain behaviors of the cartridge.The simulation and theoretical a-nalysis results reveal that even after the drum body turns and the gunpowder gas discharge channel is completely closed,there still remains a high-pressure powder gas inside the chamber.This pressure acting on the cartridge produces an axial force far greater than the shell extraction resistance,which is the primary cause of the premature ejection of the cartridge.Engineers should thoroughly consider the evacuation of residual gunpowder gas during the rotation of the drum body when designing a revolver cannon.
revolver cannoncartridgefailure of extractingextracting forcemechanical mecha-nism
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