摘要
为了研究空降车着陆缓冲过程中的结构强度,采用有限元方法建立了车体-气囊有限元模型,在两种工况下进行仿真计算,获得最大加速度结果,并将有限元仿真与加速度试验结果对比。仿真结果能准确反映空降车着陆缓冲过程,车体冲击加速度满足着陆缓冲过程的要求。进一步得到了正常着陆工况和恶劣着陆工况下车体的应力分布情况,结果表明,车体最大Von Mises应力小于材料的抗拉强度,车体的结构强度满足设计要求。
A finite element model of hull and airbags for landing cushion process was established to research structure strength in landing cushion process of airborne vehicle based on finite element method.On this base,the maximal acceleration results of simulation were given under two conditions and compared to the results of airdrop tests.The simulation results can reproduce the landing cushion process of airborne vehicle exactly.The impact acceleration of hull satisfies requirement of landing cushion process.The stress distribution in normal airdrop condition and worse airdrop condition were obtained through simulation.The results show that the maximal Von Mises stress values of hull don＇t exceed tensile strength of the material,and the structure strength fulfils design requirements.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2012年第12期1430-1435,共6页
Acta Armamentarii
关键词
机械工程其他学科
空降车
缓冲气囊
着陆缓冲过程
有限元
接触
结构强度
other disciplines of mechanical engineering
airborne vehicle
cushion airbag
landing cushion process
finite element
contact
structure strength
