单圆柱气囊缓冲性能探讨  

Study on impact attenuation capability of cylindrical airbag

作　　者：黄国[1] 李玮洁[1] 黄海明[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《北京交通大学学报》2013年第4期139-142,共4页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金资助项目(11272042)

摘　　要：基于有限元法和控制体积法建立了圆柱形气囊缓冲系统的有限元模型.以着陆速度6.7m/s、高2m、直径1 m的圆柱形气囊为例,利用LS-DYNA软件,计算空投设备着陆过程中的缓冲速度和加速度,并对影响气囊缓冲性能的排气孔开口大小、排气阀门值及气囊初始内压进行了分析.研究发现:改变气囊的排气孔开口大小和排气阀门值可以使空投设备的最大过载降至最小;在不超过排气阀门值的范围内,增大气囊的初始内压可以有效地提高气囊的缓冲性能.Based on finite element analysis（FEA） and control volume method（CV）, the model of cylindrical airbag is made. Taking the cylindrical airbag which has the landing speed of 6.7 m/s, the radius of 1 m and the height of 2 m for an example, the velocity and acceleration of the airdrop equipment during landing are calculated by LS-DYNA software, and the impact to buffering performance caused by the venting area, the venting critical value and the initial pressure is also analyzed. The result shows that changing the venting area and the venting critical value can minimize the maximum overload. In the case that the initial pressure does not exceed the venting critical value, increasing the initial pressure can improve the impact attenuation capability of cylindrical airbags efficiently.

关 键 词：圆柱形气囊 缓冲 控制体积法 有限元法 

分 类 号：V244.11[航空宇航科学与技术—飞行器设计] V211