空降空投中的气囊缓冲包装技术

目的对目前缓冲着陆气囊的发展状况进行总结分析,对重装空投气囊着陆缓冲系统的性能进行评估。方法通过建立某重型装备气囊缓冲系统的LS-DYNA有限元模型,对该模型进行缓冲仿真计算,对着陆装备的速度历程和加速度历程进行分析。结果在重力加速度作用下,0.15 s时间内,仿真模型从4.8 m/s加速到触地速度为5.4 m/s;在气囊缓冲作用下加速度减为0时,继续加速到速度最大值,之后模型在反向加速度作用下急剧减速后产生反向速度,经过几次波动后最终速度基本为0,即着陆成功。结论仿真模型的速度和加速度的变化情况等都满足气囊安全着陆应有的规律,体现了仿真的可行性。

Airbag Cushion Packaging Technology in Airborne Airdrop

The work aims to summarize the current development situation of the cushion landing and assess the performance of heavy equipment airdrop airbag landing system. The LS-DYNA finite element model of an airbag buffer system for a heavy equipment was established. Simulation calculation was carried out for the model. Velocity history and acceleration history of the landing gear were analyzed. The results showed that under the action of gravity acceleration, the speed of the simulation model accelerated from 4.8 m/s to 5.4 m/s in 0.15 s. The model continued to accelerate to the maximum speed as acceleration was reduced to zero under the cushion of the airbag, and then under the action of reverse acceleration, reverse speed was generated after a sharp deceleration. After several fluctuations, the final speed was basically zero, which meant successful landing. In conclusion, the change process of both the velocity and the acceleration satisfies the rule of airbag safety landing, and the feasibility of simulation is reflected.