-
摘要为了对某大口径火炮在整个发射过程中的过载特性进行研究，基于155毫米口径火炮，我们建立了其经典内弹道模型以及一文气体动力学模型。考虑到两种模型的差别，对经典内弹道模型采用龙格-库塔法进行求解，对一文气动力模型采用MacCormack差分格式进行求解。改变装药及发射条件，对所得的数值结果进行曲线绘制，得到了弹后空间的压力分布曲线以及加速度分布曲线。通过对于所得曲线的分析，得到了不同发射条件下，火药燃气参数变化规律和内弹道过程的过载特性。结果表明，火炮的过载在初始时刻有一个突变，之后随行程逐渐增大到峰值，然后逐渐减小。不同装药条件下，弹丸在膛内的过载变化趋势是相同的。22694
- 上一篇：Fortran壅塞式燃气阀芯通道内流场数值研究
- 下一篇：fluent调节阀设计与流动特性研究+CAD图纸
关键词： 内弹道 大口径火炮 过载特性 数值模拟
毕业设计说明书（毕业论文）外文摘要
Title The Emission Process Overload Characteristics of A Large Caliber Guided Projectile
Abstract
In order to study the process of big caliber artillery firing overload characteristics, based on 155mm caliber artillery, we have established the classical trajectory model and its one-dimensional aerodynamic model during the launch . Taking into account the difference between the two models, the classical interior ballistic model using the Runge-Kutta method to solve, the one-dimensional aerodynamic model using MacCormack difference scheme for solving. Change charging and emission conditions,the numerical results of the curve is drawn,we can get the space pressure distribution curve and the acceleration distribution curve. Through the analysis of the curve,we was obtained under the condition of different firing gunpowder gas parameters change rule and the internal ballistic process of overload characteristics. The results show that the overload artillery has a mutation at the initial time, then gradually increased to a peak with the stroke, and then gradually decreases.Drug under different
Loading conditions,the projectile overload trends in the bore is the same.
Keywords : internal ballistic large-caliber artillery overload characteristics numerical simulation
目 次
1 绪论 1
1．1 内弹道简介 1
1．2 研究背景 1
1．3 国内外研究现状 2
1．4 本文的研究内容与方法 3
2 炮射导弹经典内弹道模型 5
2．1 几何燃烧定律及应用条件 5
2．2 瞬时挤进假设 5
2．3 内弹道基本假设 6
2．4 经典内弹道方程组 6
2．5 本章小结 7
3 一文气动力模型 8
3.1 一文气动力模型概述 8
3.2 一文气动力模型基本假设 9
3.3 一文气动力模型基本方程 9
3.4 本章小结 10
4 数值求解 11
4.1 火药的形状特征量 11
4.2 经典内弹道模型 13
4.3 一文气动力模型 13
4.4 边界条件以及稳定性分析 16
4.5 本章小结 18
5 数值分析 19
5.1 火炮及火药参数 19
5.2 结果曲线 19