不同工况条件下刚性抛壳机构仿真建模分析

Simulation modeling and analysis of rigid shell ejection mechanism under different working conditions

为研究某机枪抛壳机构的动作可靠性,分析产生卡壳故障的原因,通过多体动力学分析软件建立了自动武器抛壳机构简化虚拟样机仿真模型,研究了装药温度、滑动摩擦因数和气室冲量效率(气槽)这3个随机工况条件下叠合量对抛壳过程的影响。仿真结果表明,随着装药温度、滑动摩擦因数和气室冲量效率变化会引起弹壳发生倾斜,引起卡壳故障。通过枪械射击试验的实测数据验证了理论模型的合理性,可为其他导气室武器设计提供参考。

In order to study the action reliability of the automatic rifle shell throwing mechanism,the causes of the jam fault are analyzed and studied.A simplified virtual prototype simulation model of the automatic weapon shell throwing mechanism is established by using Multibody dynamics analysis software.The effects of the superposition amount on the shell throwing process under the three random working conditions of charge temperature,sliding friction coefficient and air chamber impulse efficiency(air groove)are studied.The simulation results show that the change of charge temperature,sliding friction coefficient and air chamber impulse efficiency will cause the cartridge case to tilt and cause the cartridge case to jam.The model is verified by comparing the test jam failure rate with the simulation failure rate,which can provide a reference for the design of other air chamber weapons.