气动枪械发射原理有关问题的研究

【作者】 胡艳岭；

【导师】 徐万和；

【作者基本信息】 南京理工大学 ， 机械设计及理论， 2008， 硕士

【摘要】 本论文是对气动枪械发射原理有关问题进行探索性研究,气动枪械发射原理是利用压缩气体作为动力能源,在弹膛内膨胀作功,推动弹丸或相关物体沿身管做定向发射。首先,该论文在阐述气动枪械发射原理的基础上,给出了气动枪械的基本概念,并通过气动枪械典型结构示例,对气动枪械结构及工作过程进行了详细描述,同时,将气动枪械工作过程分为两大核心过程——气阀工作过程和弹丸发射过程,然后,围绕这两个过程展开对气动枪械发射原理相关问题的研究,分析了气动枪械气阀工作过程的作用机理,通过对击锤簧和气阀弹簧的能量分析,得出了击打及复位能量确定方法,建立了反映气动枪械弹丸发射过程的分析模型,选用龙格一库塔方法及Matlab软件对分析模型进行解算,得到了高压气瓶压力、高压通道压力、膛内压力、弹丸位移、弹丸速度在时域内的变化曲线,通过改变气源初始压力、弹丸质量、枪管口径、枪管长度、高压通道直径、高压通道长度、弹丸初始位置等参数的取值进行解算,剖析了各个因素对气动枪械弹丸发射性能的影响规律,针对多发发射时高压气瓶供气压力降低而导致发射性能不稳定的问题,提出了改进措施。论文研究成果可供后续相关研究参考。更多还原

【Abstract】 This dissertation focuses on an exploring research about related questions of pneumatic gun firing principle. Pneumatic gun uses compressed gas as firing energy. Projectile or related object is impeled by expansion work and fired along the firing tube.Firstly, on the basis of pneumatic gun firing principle, the basic concept of pneumatic gun is given in this dissertation. The structure and work processes of pneumatic gun is completely described by using a modular design demonstration. Simultaneously, the pneumatic gun work processes include two core processes-gas valve work process and projectile firing process. Then, the following research is dead against these processes. The action mechanism of gas valve work process is analysed. Through the analysis on energy of hammer spring and gas valve spring, the determination methed of stroke and replacement energy is obtained. Secondly, the analysis model about projectile firing process is established. By using Runge-Kutta method and Matlab software, the analysis model is computed. The computation result includes: gas bottle pressure curve, high-pressured channel pressure curve, bore pressure curve, projectile displacement curve and projectile speed curve. By changing the value of gas bottle initial pressure, projectile quality, barrel caliber, barrel length, high-pressured channel diameter, high-pressured channel length, projectile initial point and so on, the influence rule of shooting performance is analysed. In view of string firing, gas bottle pressure drop causes unstable shooting performance. Improvement measure is proposed. The research results of this dissertation may supply the reference for following related research.更多还原