某型狙击榴弹发射器橡胶缓冲部件对其发射性能影响研究

Effects of rubber buffer unit on launch performance of a sniper grenade launcher

为研究某型狙击榴弹发射器橡胶缓冲部件对其发射性能的影响。通过静载与动载实验研究了橡胶缓冲部件在静载和不同平均应变率下的本构关系,建立了动力学仿真模型;根据仿真结果,分析了自动机、机匣和导轨的运动曲线,对比分析了有无缓冲垫作用下的运动曲线和后坐力曲线。结果表明:该橡胶材料本构模型具有明显的非线性、迟滞特性和应变率效应,随着应变率的增大,材料强度逐渐增大;在橡胶缓冲垫缓冲作用下可有效减小刚性接触对系统造成的影响和后坐力幅值,缓冲垫有效提高了系统的平稳性和人机工效;研究为该武器系统进一步改进打下了良好基础。

In order to study effects of rubber cushion on launch performance of a sniper grenade launcher,the constitutive models of the rubber buffer under static load and different average strain rates were studied with static and dynamic loading tests to construct the whole weapon system’s dynamic simulation model.According to the simulation results,the motion curves of automata,cartridge and guide rail were analyzed.These motion curves and the recoil one with or without a cushion were contrastively analyzed.The results showed that the constitutive model of rubber material has obvious nonlinearity,hysteresis and strain rate effect;the material strength gradually increases with increase in strain rate;the buffer action of the rubber cushion can effectively reduce influence of rigid contact on the system and the recoil amplitude;the rubber buffer effectively improves the system stability and ergonomics.The study laid a good foundation for further improvement of this type weapon system.