Research On Parametric Modeling And Simulation Of A Naval Gun

This thesis focuses on launch dynamics of the naval gun with Finite Element Methods. The main contents are as follows:â‘  Creating 3D solid model of barrel, cradle, bracket, turntable of the naval gun with Pro/E and getting the basic dimensions.â‘¡ The Python language is used for secondary development of ABAQUS. Establish specific graphical user GUI interface to realize the rapid regeneration of whole finite element model. Operational efficiency is improved and a lot of time and computing resources are saved. â‘¢Write the program for firing process with Python language. Write the program for the post-processing to realize the firing and post-processing are parameterized. A lot of repetitive operation is removed and the operation process is simplified.â‘£ The simulation of Launch process is completed and the muzzle vibration parameters are extracted. These parameters are used in the external trajectory procedure to get the data of the trajectory and dispersion.For accuracy and computation cost, the nonlinear finite element structural dynamics model of the naval gun is created with different elements such as solid elements, shell elements. At the same time, the nonlinear contact of components are considered, especially the large displacement slide and the nonlinear spring connection between gun tube and cradle rail. Implicit method is emphatically used at simulation of gun firing, because implicit methods are especially well-suited to solving structural dynamics problems. The firing process is simulated with implicit method. 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. At the same time, the accuracy of the data of trajectory and dispersion is verified. With the method of this thesis, the reasonableness of the design is verified. At the same time, design bug is found and the structure is improved. The firing accuracy is preestimated and the design is optimized.