锥膛炮内弹道建模与仿真计算

为了解决锥膛炮内弹道的建模仿真问题,在经典内弹道理论基础上引入了有限元分析方法和修正次要功系数方法。根据锥膛炮炮膛和弹丸的结构特点,将锥膛炮的内弹道过程分为第一直膛时期、锥膛时期和第二直膛时期。在运用LS-DYNA软件对锥膛时期弹丸裙环变形进行有限元分析的同时,结合MATLAB软件对其内弹道进行了建模仿真,得出了该锥膛炮内弹道时期膛压—时间曲线、速度—时间曲线。通过与全直膛炮的内弹道计算结果和试验结果比较,证明了所给方法的可行性。

Interior Ballistics Modeling and Simulation of Conic-chamber Gun System

The finite element analysis method and correction subordinate work coefficient method were introduced to achieve the interior ballistics modeling and simulation of conic-chamber gun system based on the classical interior ballistics theory. According to the structural characteristics of conic-chamber gun canal and projectile, the interior ballistics was divided into the first rectilinear-chamber phase, conic-chamber phase and the second rectilinear-chamber phase. The stress and deformation of sabot in the conic-chamber phase was calculated by the finite element analytical software LS-DYNA. And the p-t curves of gun and the v-t curves of projectile body were obtained by using LS-DYNA and MATLAB to calculate the interior ballistics of conic-chamber gun. And the methods were proved to be feasible by comparing the simulated results with the test results of rectilinear-chamber gun.