毕业论文移动版

摘要为了在弹形设计过程中考虑炮弹弹道特性的影响，从而设计出更加合理的气动外形，采用了气动力―外弹道耦合计算方法，进行某超音速旋转弹丸气动外形设计。首先，采用四阶龙格―库塔法对三自由度外弹道过程进行了仿真；其次，推导了二次激波膨胀波计算公式，并用于求解炮弹在超音速范围内的阻力系数；再次，对气动力―外弹道耦合计算方法进行了研究；最后，在气动力―外弹道耦合计算的基础上对某防空旋转弹的气动外形进行了设计。结果表明，基于气动力—外弹道耦合计算的气动外形与静态设计的气动外形是存在差异的，且基于气动力—外弹道耦合计算的气动外形更加合理。64272

毕业论文关键字  外弹道  气动力  耦合计算  气动外形设计

毕业设计说明书（论文）外文摘要

Title  A supersonic rotating projectile’s aerodynamics shape designing based on aerodynamics-exterior ballistics coupling methodology                                              

Abstract In order to considerate the projectile ballistics characteristics to design a more reasonable aerodynamics shape during the design process,the aerodynamics-exterior ballistics coupling methodology is used to design a supersonic rotating projectile’s aerodynamics shape.First,the fourth-order Runge-Kutta method is used to simulate 3 DOF projectile exterior ballistics.Second,the second-order shock-expansion’s formula is deduced and used to calculate the projectile’s drag coefficient range at supersonic.Third, aerodynamics - exterior ballistics coupling methodology is studied. Finally,a supersonic rotating projectile’s aerodynamics shape is disigned on the basis of the aerodynamics - exterior ballistics coupling methodology. The results show that the aerodynamics shape which based on the basis of the aerodynamics - exterior ballistics coupling methodology is different from the one that based on static design,and is more reasonable.

Keywords  exterior ballistics    aerodynamics   coupling methodology    aerodynamics shape disigning

1 绪论 1

1.1 背景和意义 1

1.2 国内外研究状况 2

1.3 本文研究的主要内容 3

2 炮弹质心运动方程组 4

2.1 外弹道基本假设 4

2.2 描绘炮弹质心运动的主要参量 4

2.3 自然坐标系的炮弹质心运动方程组 5

2.4 方程组的求解问题 7

3 超音速旋转弹丸的阻力系数 10

3.1 旋成体炮弹的一般几何特性 10

3.2 波阻 12

3.3 摩阻 31

3.4 涡阻 34

4 气动力－外弹道耦合计算 (责任编辑：qin)