气囊着陆缓冲过程仿真分析  

Simulation Analysis of Airbag Cushioning Process during Landing

作　　者：卫剑征[1] 王滢 甄铎 谭惠丰[1] 杨知寒 WEI Jianzheng, WANG Ying, ZHEN Duo, TAN Huifeng, YANG Zhihan(Center for Composite Materials and Structures,Harbin Institute of Technology, Harbin 150080, China)

机构地区：[1]哈尔滨工业大学复合材料与结构研究所,哈尔滨150080

出　　处：《载人航天》2018年第4期529-535,共7页Manned Spaceflight

基　　金：载人航天预先研究项目(040202)

摘　　要：针对气囊着陆缓冲与反弹问题,以对称的胶囊状双气囊缓冲系统为研究对象,提出了气囊的等效弹簧刚度和阻尼模型,讨论了着陆速度与气囊等效阻尼的变化关系。建立了双缓冲气囊的有限元模型,基于显式计算方法对双气囊有无排气孔的着陆缓冲过程进行了仿真,表明有排气孔气囊能实现软着陆。建立了有排气孔的芳纶织物双气囊缓冲试验系统,通过电磁快速释放装置完成了双气囊被动式排气孔的测试。结果表明,被动式排气孔的胶囊状气囊能有效起到缓冲作用,无侧翻和明显反弹,并验证了设计方法的正确性。To solve the cushioning and re-bouncing problems of the airbag during landing, a landing system with double symmetrical capsule-like airbags were studied and the equivalent spring stiffness and damping models of the airbags were established. The relationship between the landing velocity and the equivalent damping was discussed and the finite element model of the double landing airbags was created. The landing processes of the double airbags with or without gas vents were simulated based on the explicit solver. Simulations indicate that airbags with leaking vents can achieve a soft landing. Then the landing system with double airbags made up of Kevlar fabric was set up and the airbags with both leaking vents were tested by the electromagnetic quick-release device. The results showed that the capsule-like airbags with leaking vent could realize the cushioning without any obvi-ous rollover or bounce, and thus the correctness of the design was verified.

关 键 词：陆缓冲 气囊 排气孔 着陆反弹 

分 类 号：V244.1[航空宇航科学与技术—飞行器设计]