弹箭发射阶段章动角测试技术研究
关键词 章动角 稳定性 章动角大小
毕业论文设计说明书外文摘要
Title Study of Measurement and Test Technology of Nutation Angle at the Launching Stage of Projectiles and Rockets
Abstract
Nutation of projectiles is an important factor in measuring the stability of projectiles. In the experiment of artillery, there are often cases where projectiles somersault or the precision of shooting is not high enough. These are all in relation to the instability caused by the nutation of projectiles. Many of the current studies focus on the measurement and test of nutation angle of projectiles when they are free flying. Instead, there are no related studies on the measurement of nutation angle of projectiles during their launching stage. Although the nutation angle is very narrow, if again reduced, then the stability of projectiles during the follow-up flying will be greatly increased. Based on the theories now available, this paper calculates the degree of the nutation angle of projectiles during the initial stage with the set up of test-bed and writing of related software.
Keywords Nutation Angle, Stability, Degree of Nutation Angle
目 次
1 引言 1
1.1 课题背景及意义 1
1.2 研究现状 1
1.3 高速旋转稳定弹章动角产生机理 3
1.4 旋转稳定弹章动角理论组成 4
1.5 论文主要研究内容 11
2 火炮内弹道及章动角计算 13
2.1 计算火炮內弹道的基本假设 13
2.2 內弹道方程组 14
2.3 章动角的计算 20
2.3.1 章动角理论计算 20
2.3.2 内弹道数值计算及章动角计算 23
3 测量章动角实验装置设计 29
3.1 设计实验装置的前期准备 29
3.2 整个测试系统的要求 29
3.3 设计实验装置 30
3.4 实际实验装置 34
3.5 实验中注意的事项 35
4 章动角计算及数据处理 38
4.1 章动角计算流程 38
4.2 实验数据处理 40
结论 47
致谢 48
参考文献 49
主要符号一览表
A赤道转动惯量
综合装填系数
弹道系数
c极转动惯量
阻力系数
升力系数
马格努斯力系数
d 弹径
某瞬间火药药粒燃去的厚度
火药力
火药燃烧结束瞬间压力全冲量
比热比
弹丸沿炮膛的行程长
药室容积缩径比
弹长
药室自由容积缩径长
弹丸质量
翻转力矩系数
极阻尼力矩系数
赤道阻尼力矩系数
马格努斯力矩系数
马赫数
气体压强
点火压力
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