摘要
针对应急气囊充气展开过程以及直升机应急气囊冲击着水过程进行了数值模拟,得到了不同充气速率下气囊展开过程中内部压力分布情况,并根据气囊内压力变化规律,将气囊充气展开过程分为线性膨胀、深度膨胀和过度膨胀3个阶段,其中最大安全压力可为智能化充气控制提供阀值选择依据。同时,冲击着水受力状态和速度特性数值模拟结果与实验一致,可以用于应急气囊的工程设计。
The emergency airbag deployment process and the helicopter ditching process are numerically studied. The results show that the deployment processes can be subdivided into three different phases： linear expansion, depth expansion and over-expansion deployment, based on the variation of pressure and volume inside airbags. A meaning of safe maximum pressure is given to set a critical value for the intelligent deployment control. Meanwhile, the analyses result of ditching process show that force and speed characteristics are useful to design the airbag when helicopter emergent water landing.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2012年第5期713-717,共5页
Journal of Nanjing University of Aeronautics & Astronautics
关键词
直升机应急气囊
充气过程
冲击着水
水上迫降
helicopter emergent airbag
deployment process
ditching
water landing
