| 黄国,黄海明,徐晓亮,李玮洁.双圆柱气囊缓冲性能分析[J].计算力学学报,2014,31(2):212~216 |
|
| 
码上扫一扫！ |
| 双圆柱气囊缓冲性能分析 |
| Simulation on impact attenuation capability of bi-cylinder airbags |
| 投稿时间：2012-11-07 修订日期：2013-04-13 |
| DOI：10.7511/jslx201402012 |
| 中文关键词: 双圆柱气囊 缓冲 控制体积法 有限元法 |
| 英文关键词:bi-cylinder airbags impact attenuation control volume method FEM |
| 基金项目:国家自然科学基金（11272042）资助项目. |
|
| 摘要点击次数: 2448 |
| 全文下载次数: 1450 |
| 中文摘要: |
| 基于有限元法和控制体积法，建立了双圆柱气囊缓冲系统的有限元模型。以着陆速度为6.7 m/s，高为2 m，直径为1 m的圆柱形气囊为例，利用LS-DYNA软件计算气囊缓冲过程中空投设备的速度和加速度，并对影响气囊缓冲性能的织物弹性模量、排气孔开口面积以及气囊初始内压进行了分析。结果表明：（1）当气囊织物的弹性模量E≤0.5 GPa时，增大弹性模量可以显著提高气囊的缓冲性能；当气囊织物的弹性模量E>0.5 GPa时，增大弹性模量对气囊缓冲性能的影响很小。（2）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。 |
| 英文摘要: |
| Based on the finite element method and the control volume method,it is available to build a model for the impact attenuation of bi-cylinder.Taking the cylindrical airbag with the landing speed of 6.7m/s,the diameter of 1m and the height of 2m as an example,the landing velocity and acceleration are simulated by using the LS-DYNA software.At the same time,the effect of the elastic modulus,the venting area and the initial pressure in the airbag on the impact attenuation are also analyzed.The results show that:(1) Increasing the elastic modulus of airbag fabric will significantly improve the shock-absorbing capacity of the airbag,when the elastic modulus of airbag fabric is under 0.5GPa; however,the increasing has few effects on the improvement,when the elastic modulus of airbag fabric exceeds 0.5GPa.(2) Increasing the initial pressure of the airbag fabric will improve the shock-absorbing capacity of the airbag effectively,when the pressure is lower than the value of the venting area. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
