不同燃气流量对空间气囊充气展开过程的影响  

Simulation Analysis of the Effect of Different Gas Flow on Airbag Inflatable Process

作　　者：信志涛 王浩[1] 陶如意[1] XIN Zhitao;WANG Hao;TAO Ruyi(School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)

机构地区：[1]南京理工大学能源与动力工程学院,南京210094

出　　处：《兵器装备工程学报》2018年第6期71-75,共5页Journal of Ordnance Equipment Engineering

摘　　要：某空间气囊由火药在燃气发生器内燃烧产生的燃气作为动力源,为验证不同燃气流量对气囊在真空状态下充气展开过程的影响,建立了燃气发生器内弹道数理模型和气囊的有限元模型,使用经典内弹道理论计算得到不同装药量下喷嘴流量和燃烧室温度曲线,并针对气囊充气展开的动力源问题,在LS-DYNA软件中采用控制容积法(CV法)对气囊展开过程进行了仿真分析。结果表明:燃气流量越大,气囊展开越快,最大应力及囊内压力也越大;调整装药量可以改变气囊充气展开过程。A space airbag use gas which is generated by gunpowder burning in gas generator as power source of inflatable expansion. In order to verify the effect of different gas flow on the inflatable process of the airbag in vacuum,mathematical model of interior ballistics of the gas generator and finite element model of the airbag are established. According to the gas generator gunpowder burning model and airbag model,using the classical interior ballistics theory,the calculated curves of different nozzle gas flow and combustor temperature under different charge mass are used as the power source of airbag inflatable deployment,and the airbag inflatable process is simulated and analyzed by using control volume method（ CV method） in LS-DYNA software. The results show that the larger the gas flow,the faster the airbag deploys,and the greater the maximum stress and the pressure in the airbag,and adjusting the charge mass can change the airbag inflatable process.

关 键 词：气囊 燃气流量 控制容积法 燃气发生器 

分 类 号：TJ413.3[兵器科学与技术—火炮、自动武器与弹药工程]