A Gun Fired Dynamics Simulation Analysis

41The shooting of gun is an instantaneous process with high-energy and high impact.In the process,vibration and the impact on the structure are obvious.Therefore,it is crucial to study the dynamic response of the system.Performing computer simulation on the process of shooting is an effective means.This thesis focuses on the elastic deformation of tube during the naval gun shooting and performs research on the effect of the interaction of projectile and barrel on the fire accuracy. RecurDyn is used to carry on launch dynamics simulation of naval gun,based on multi-body system dynamics theories and methods.The main contents are as follows:①The three dimension model of the naval gun including cannon,barrel,cradle.etc has been built in the environment of Pro/E,which provides the necessary conditions for the building of the dynamics equivalent model.②In order to illustrate the problem better,multi-rigid-body system model,the system coupled with rigid bodies and elastic bodies,and the system coupled with projectile and cannon,which considers the interaction of projectile and barrel during the naval shooting,are built respectively.Apply the three above models each to simulate the process of shooting with an angular altitude of 0°.The characteristics of structural dynamics response of the gun are obtained through analysis.Through the comparison from the result,the stiffness and strength of the naval gun is verified and the basis to improve the firing accuracy is provided.With the method of this thesis,much work such as verifying scheme,finding design bug,verifying firing accuracy,evaluating stiffness and strength of the gun can be done through simulation in the stage of gun design,then period of design is shortened,and cost of design is also reduced.