Study On The Launch Dynamics Of A Gun Coupled With It's Automatic Ramming System

This paper focuses on launch dynamics of a self-propelled gun coupled with its automatic ramming system, based on the rigid multi- bodies theory. The main contents are included as follows: The first, three-dimensional models of the whole gun and it's ramming system are constructed by use of the software platforms of I-deas and ADAMS (Automatic Dynamic Analysis of Mechanical System ). The second, the dynamic equations are obtained according to the Lagrange equations ofthe first kind expressed by Euler angles. Then the dynamic equations of the automatic ramming system and the overall gun, as well as the overall gun coupled with it s ramming system are established. The third, the vibration theory of chord is applied to establish the model of the ramming system. The chain organ's polygon effect and it s meshing impact are involved in the model. The transverse vibration of the ramming system is analysed for the solution. The fourth, The models of the drivers are set up by electromotor drive and fluid drive theory, from which the programs are compiled for ADAMS to call in as the input parameters. The fifth, many impacts and contacts are considered in the dynamic models. Then a subsection simulation method is brought forward on the ADAMS software, so as to successfully obtain the solution of these dynamic multi-contacts models. The validity of the subsection simulation method is proved, in which postprocessing technology is widely used. The sixth, the static simulation is necessarily to find out the dynamic system's initial state for dynamic simulation. The gun is looked upon as a hyper-equilibrium structure, and a so-called 'Parallel Projection Method' is brought forward for the gun's static simulation. The seventh, dynamic analyses on the gun, the gun's ramming system, and the overall gun coupled with it's ramming system are simulated.