摘要
APU是安装在民用飞机上的辅助动力装置,是飞机上重要的部件,因此必须考虑APU转子爆破时小碎片对飞机安全的影响。通过有限元软件LS-DYNA,分别模拟了APU转子爆破时小碎片对APU防火墙以及3种不同厚度加强板的冲击计算。根据数值计算结果,选择合适的加强板方案,既能防止防火墙碰撞区被小碎片击穿,同时付出的重量代价又较小。通过对APU防火墙增加加强板,确保APU转子爆破时飞机的安全性,满足AC20-128A的设计要求。
Auxiliary power unit is an important part which is installed on the civil aircraft. It is necessary to consider the security of aircraft while APU rotor bursts. This paper simulates the impact of small fragment onto the APU- firewall,and calculates three different thickness of reinforce- plate with finite element software. According to the result of numerical calculation,an appropriate reinforce- plate thickness was chosen,which can prevent the small fragment,while the aircraft weight need increase small. By reinforcing the impact zone of APU- firewall,the security of the aircraft is ensured while APU rotor bursts,and the design requirements for AC20- 128 A is met.
出处
《民用飞机设计与研究》
2016年第1期14-16,61,共4页
Civil Aircraft Design & Research
