自动炮支架作用原理分析

针对在小口径自动炮上使用的支架，将火炮身管和支架简化为空间多段有限元弹性梁单元，引入形函数矩阵描述梁单元的挠度，采用拉格朗日方程建立了考虑支架与身管耦合的有限元动力学模型。在有限元模型的基础上建立了数值计算程序并利用该模型分析和讨论了支架的作用原理，分析结果表明采用设计合适的支架将有助于提高小口径自动炮的射击精度。

Analysis on the principle of bracket for automatic gun

An analysis on the principle of bracket used on small caliber automatic gun is presented in this paper. A FEM dynamical model is established to simulate the coupled movment of gun barrel and bracket. In the model, gun barrel and bracket are described as some elastic beam elements, shape function is used to describe the disturbing of these elements, and lagrangian equation is used to educe the dynamical equations. A numerical simulation of the dynamical model is presented, and the analysis and discussing based on the numerical results indicate that a properly designed bracket will be helpful to firing precision of small caliber automatic gun.