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摘要本毕业设计以140mm森林灭火弹为研究对象，总体完成灭火弹的整体外形结构设计，使各个结构连接结构合理，能满足灭火弹强度要求，整体布局合理，方便装配，便于使用与文修。为满足相应射程要求和灭火效果，本毕业设计需要对灭火弹整体进行气动力计算和内弹道计算，在进行弹道计算前，首先使用 missile-Datcom 灭火弹的气动力参数和压心稳定储备量进行计算，将结果与笔算结果进行对比，满足要求后进行灭火弹的内弹道计算，根据灭火弹的射程需要，设计装药和发动机尺寸，计算发动机的压力随时间变化曲线。内弹道计算完成后，计算外弹道，考虑到灭火弹射程近，飞行高度低，采用无修正的质点弹道进行计算灭火弹的飞行轨迹和射程。整体验证计算结束后，进行弹的实际发射试验。27372
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毕业论文关键词 灭火弹 结构设计 外弹道 内弹道 气动力
Title 144mm Forest Fire Bombs Design
Abstract This graduation designed to 140mm forest fire bombs for the study, the overall completion of the overall shape of fire bombs structural design, so that each structure is reasonable connection structure to meet the strength requirements of fire bombs, overall layout is reasonable, easy to assemble, easy to use and maintenance. In order to meet the requirements of the appropriate range and fire effects, this graduate design a whole needs to fire shells aerodynamic calculations and interior ballistic calculations Before ballistic calculation, first with the parameter and press center stable reserve aerodynamic Missile-Datcom fire bombs were post-calculation, the results were compared with a written calculation results meet the requirements of the fire bombs inside the ballistic calculation, according to fire shells range needs, design and engine size of the charge, calculated engine pressure versus time. After the completion of the interior ballistics calculation, calculate external ballistics, taking into account the fire bombs close range, high and low flight, using no correction of particle trajectory calculations fire bombs trajectory and range. After the overall verification calculations, the actual emission test bomb. Keywords Fire bombs structural design Trajectory internal ballistics aerodynamic
目录
1 绪论 . 1
2 灭火弹总体设计与分析 . 3
2.1 灭火弹总体参数确定 3
2.2 灭火弹气动外形分析与确定 5
2.3 灭火弹翼片设计 6
2.4 灭火弹引信设计 . 10
2.5 灭火弹灭火药选取 . 11
2.6 本章小结 . 11
3 火箭弹空气动力特性分析与计算 12
3.1 灭火弹升力系数计算 . 12
3.2 灭火弹阻力系数计算 . 18
3.3 压力中心计算和分析 . 28
4 火箭发动机设计分析 28
4.1 推进剂装药设计 . 28
4.2 发动机燃烧室设计 . 28
4.3 喷管形状设计 . 32
4.4 本章小结 . 33
5 灭火弹内弹道分析计算 33
5.1灭火弹内弹道理论分析 33
5.2 灭火弹零文内弹道计算 . 35
5.3 本章小结 . 38
6 灭火弹外弹道分析计算 38
6.1 求解外弹道常用数学算法分析与应用 . 38
6.2 常用外弹道弹道分析方法 . 39
6.3灭火弹外弹道仿真计算 41
6.4灭火弹外弹道分析与反馈 44
6.5本章小结 44