Design And Study Of The Abdominal Feed System For A Large Calibre Naval Gun Based On The Metamorphic Principle

Due to the advantages of large storage,continuous emission in all-weather,higher fire intensity and cost-effectiveness,the large caliber naval gun has the irreplaceable role in the military,including seacoasfire support and naval warfare.As an important part of naval warfare weapon system,an increasing number of attentions have been paid on the large caliber naval gun.With the development of weapons technology in recent years,more strict requirements have been put forward in the modern battle field,such as high launch speed,more compactness,and more reliability.The ammunition handling system is the core part in a naval gun weapon system.Therefore,it should be obtain new breakthrough in the ammunition handling system to improve the performance of the naval gun weapon system.After the overview of the typical large caliber gun turret for flare system in the world,the design principle of ammunition handling system was presented.And three different design schemes of the ammunition handling system were proposed.Furhtermore,the paper evaluated the three design schemes based on the analytic hierarchy process(AHP).Finally,simulations in the MCE software platform were carried out to verify the evaluation results.The center ammunition handling system based on the metamorphic principle was selected to be analyzed by mechanisms analysis method.First of all,the paper planned the movement trajectory for the ammunition handling system.Taking the different trajectories in different phase,the corresponding child structure states mechanism were designed,and their genetic models were established based on the gene modeling theory.Then the genetic model for the ammunition handling system could be obtained by pyramiding genes.Secondly,according to the variable cell for organization structure diagram,each coding structure state diagram of mechanism motion and motion pair coding,comprehensive analysis of function principle,motion rules and structure transformation process was conducted.Finally,augmented adjacency matrix was established for the metamorphic ammunition handling system based on kinematic pair coding.And the paper constructed the mathematic model(metamorphic equations)which was used to depict the variable principle between each child playing institution in the metamorphic ammunition handling mechanism.The paper determined the maximization of the minimum transmission angle for the metamorphic ammunition handling system as the optimation object to design the design parameters of mechanism.A group of optimization parameters were acquired by using the MATLAB optimization toolbox,after determing the boundary.Furthermore,the kinematics analysis were conducted based on the closed-loop vector method and the kinematics equation was established.Finally,in order to analyze the kinematic performance of the metamorphic ammunition handling system,the numerical calculation was carried out in the MATLAB/Simulink environment.And the paper also studied the suppression for the pulse caused during the structural state transform.The dynaic performance of the metamorphic ammunition handling system were analyzed.the analysis of the mechanism kinematics relation and the nonlinear deformation field were performed by using distributed parameter model.Taking the flexible effect of the connecting rod belonging to the mechanism into consideriation,the deformation energy of flexible connecting rod was calculated by using the continuum mechanics.And the kinetic energy of flexible multibody system and the virtual work of external force were calculated based on the method of analytical mechanics.Moreover,the coupled dynamics equation was established for mechanism of the metamorphic based on Hamilton principle.And the rigid-flexible coupling discretization dynamics equation of the mechanism was built through the discretization based on the finite element analysis.Finally,numerical simulations were performed to determine the influence of feed rate on the ammunition handling accuracy,which would contribute to improve the precision of the ammunition handling.