Howitzer Firing Stability Simulation And Analysis

The investigation of this dissertation is centered on national defense project titled by study on virtual reality for artillery engineering by selecting a vehicle mounted howitzer as the served object. The main goal of this work is to present a methodology for simulating firing stability of the vehicle mounted howitzer. The main contents are as below:Firstly, in conjunction with the system level considerations, the overall scheme of the vehicle mounted howitzer is determined by decomposing both military specifications and technical requirements of the weapon system.Secondly, the preliminary design of hydraulic subsystem including spades and base plate is presented by use of mechanical principle and hydraulic control technology. The performance analysis is conducted for this subsystem under both the operational status and the other case.Thirdly, firing stability of the vehicle mounted howitzer is elementarily analyzed in terms of traditional design theory. Due to the shortage of the classical method used in artillery development, it is necessary to construct multi-body system dynamics model for improving the design quality of the howitzer.Fourthly, ADAMS package is introduced, including the employed theoretical background of multi-body system dynamics and modeling method. Based on platform of ADAMS, the multi-body dynamics model is constructed for the vehicle mounted howitzer.Fifthly, mathematical models of the force system such as gas force and others are developed, and the related codes in language of Visual FORTRAN are compiled according to the characteristics of the special loads caused by launching. Such a program is successfully embedded into ADAMS package using DLL(Dynamic Link Library) technology. AndFinally, simulation and analysis on the firing stability of the system are implemented via the ADAMS Solver and Post-processing modules, considering the various firing conditions. The firing stability of the vehicle mounted howitzer is retrieved by analyzing the simulation plots, tables and data, including jump angle of chassis, jump displacement of base plate center, recoil and out-of-battery displacement of gun system, and the motion of spades.