%0 Journal Article %T 列车碰撞试验台气囊弹射加速仿真研究<br>Simulation of Airbag Ejection Acceleration Process on a Train Collision Testbed %A 柳忠彬 %A 肖守讷 %A 罗世辉< %A br> %A LIU Zhongbin %A XIAO Shoune %A LUO Shihui %J 西南交通大学学报 %D 2017 %R 10.3969/j.issn.0258-2724.2017.01.018 %X 为了提高机车车辆碰撞试验台的驱动能量，提出气囊自增长可变边界，实现了高压气体在约束且不爆破条件下长距离弹射做功.基于控制体积法，利用LS-PrePost和LS-DYNA软件建立环形折叠气囊的弹射模型，在初始压缩和一定压力条件下，研究多节气囊的受压弹射过程和气囊构造特征对气囊弹射行为及能量的影响规律.研究结果表明：环形折叠气囊弹射模型能够反映气囊弹射加速方法的基本特性，气囊弹射加速持续并且稳定；气囊节数与弹射距离、能量输出大小和弹射试验台稳定性有关，气囊节数越多弹射作用距离越大、能量输出效果越显著，3节气囊弹射能量是1节气囊弹射能量的6倍；气囊节数越多气囊端部摆动量越大，但3节气囊弹射端部摆动量不超过7 mm，气囊弹射稳定性良好.<br>： To solve the driving problem with great energy for a train collision testbed, the airbag with a self-growth variable boundary was proposed. The airbag with high-pressure gas can work effectively in a long distance under the condition of constraint and un-blasting. Based on the control volume method, an ejection model of the circlewise folding airbag was built using the simulation software LS-PrePost and LS-DYNA. The influence of the ejection process and structural features of multilevel airbags on the ejection behavior and energy was studied under conditions of initial compression and a certain pressure, respectively. The results show that the ejection model of the circlewise folding airbag can reflect the basic characteristics of the airbag ejection acceleration method, and the airbag ejection acceleration is stable and continuous. The number of airbags has a significant effect on the ejection distance, the output energy, and the stability of the airbag collision testbed. A more number of airbags means a greater ejection distance and more effective energy output. The energy of a three-airbag catapult is 6 times than that of a one-airbag catapult. The more the number of airbags is, the larger the lateral displacement of the airbag ends is. However, the swing displacement of a three-airbag catapult is not more than 7 mm, and hence a good stability can be ensured in the airbag ejection process %K 高速列车 %K 耐撞性 %K 弹射方法 %K 数值模拟 %K < %K br> %K high-speed trains %K crashworthiness %K ejection method %K numerical simulation %U http://manu19.magtech.com.cn/Jweb_xnjd/CN/abstract/abstract12384.shtml