A Gun Rack On The Dynamic Characteristics Of The Study

The thesis takes the research subject of a new artillery weapon as its background. The theory of structural dynamics and nonlinear finite element is used to analyse the structural dynamics nonlinear finite element of the new artillery weapon. The dynamic stability of carriage parts in firing process and the dynamic stiffness strength are studied in the thesis .This thesis mainly tries to explore new ways to analyse these problems of the firing process, which can provide scientific reference for the design and R&D of the artillery.The research mainly includes the following work: 3D geometry model of lower carriage, trails and connectors is established, then their finite element mesh is established on this foundation, in which, shell elements are used to mesh carriage parts, solid elements are used to mesh connectors. The implicit time integration program is applied by the thesis to analyse dynamic stiffness strength of carriage parts under the two statements of the gun firing at the direction/elevation angles of 0°/0°and 0°/85°. In order to analyse the dynamic stability of the carriage parts firing at the direction/elevation angles of 0°/0°clearly, nonlinear finite element model of spade and soil is also established by this thesis, considering the instability of the artillery in projectile process by the resistance of artillery. The depth which spade needs to throw into at the direction/elevation angles of 0°/0°is calculated by analysing the different depth of nonlinear finite element model to validate the validity and creditability of the calculation result, thus analysing the dynamic stability of carriage parts at the direction/elevation angles of 0°/0°.