某型飞机口盖撞击问题研究

Study on Access Cover Impact Problem of a Certain Aircraft

某小型无人飞机在降落回收时,通过锁体爆炸实现降落伞与飞机分离,但锁体将直接砸向飞机。飞机背部油箱口盖采用全复合材料泡沫夹芯结构,其遭受冲击可能导致油箱破损漏油,将严重威胁飞机正常使用。为解决该问题,采用有限元软件MSC.Dytarn对现有口盖方案以及多个优化方案进行仿真分析,通过对比分析结果,成功改进了结构方案。

During the landing and recovery process of a small UAV,the parachute is separated from the UAV through a lock explosion,but the lock would directly go toward the aircraft.The fuel tank access cover on the back of the UAV is made of all composite foam sandwich structure.The impact may lead to fuel tank damage and leakage,which will seriously threaten the normal use of the UAV.To solve this problem,the finite element software MSC.Dytarn is used to simulate and analyze the existing access cover scheme and the multiple optimization schemes.By comparing the analysis results,the structural scheme is successfully improved.