| 王晓祺,王刚,张柄楠,高紫阳,许国润.折叠气囊展开过程仿真与分析[J].装备环境工程,2024,21(12):34-41. WANG Xiaoqi,WANG Gang,ZHANG Bingnan,GAO Ziyang,XU Guorun.Simulation and Analysis of Folding Airbag Deployment Process[J].Equipment Environmental Engineering,2024,21(12):34-41. |
| 折叠气囊展开过程仿真与分析 |
| Simulation and Analysis of Folding Airbag Deployment Process |
| 投稿时间：2024-07-15 修订日期：2024-09-30 |
| DOI：10.7643/issn.1672-9242.2024.12.005 |
| 中文关键词: 折叠气囊 水下 质量流速 充气过程 折叠建模 有限元模型中图分类号:TJ630 文献标志码:A 文章编号:1672-9242(2024)12-0034-08 |
| 英文关键词:folding airbag underwater mass velocity gas replenishment process folding modeling finite element model |
| 基金项目: |
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| Author | Institution |
| WANG Xiaoqi | School of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051, China |
| WANG Gang | School of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051, China |
| ZHANG Bingnan | School of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051, China |
| GAO Ziyang | School of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051, China |
| XU Guorun | School of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051, China |
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| 中文摘要: |
| 目的 研究操雷上浮装置中折叠气囊在水下充气展开的动态特性行为。方法 根据热力学定理，构建质量流计算模型，获取气囊入口处的气体质量流曲线，通过有限元分析软件LS-DYNA，采用控制体积法(Control Volume，CV)，考虑不同水深带来的外部压力差异，对折叠气囊的展开过程进行仿真分析。结果 随着水下深度的增加，在其他条件相同的条件下，气囊内气体质量流入的初始速率递减，气瓶内部压强下降速度减缓，充气时间相应延长，在陆上为0.008 s，水下100 m为1.392 1 s。同一水深，较小通径的管道会导致流入气囊气体的质量流速降低，从而显著增加达到工作压力所需的时间，4 mm通径为0.365 7 s，12 mm通径为0.040 6 s。多次折叠气囊在充气初期，压力变化较为剧烈，最大压力峰值为0.447 MPa，接近工作压力0.453 MPa。结论 整个充气过程分为初期、中期和后期3个阶段，气囊的初始折叠状态对初期影响最大。仿真计算得出，气囊完全展开所需时间与通径呈指数型函数关系。 |
| 英文摘要: |
| The work aims to study the dynamic characteristic behavior of folding airbag in underwater inflatable deployment of mine-manipulating floating device. According to the thermodynamic theorem, a mass flow calculation model was constructed, and the gas mass flow curve at the inlet of the airbag was obtained. Through the finite element analysis software LS-DYNA, the control volume (CV) method was used to consider the external pressure difference caused by different water depths. The simulation analysis of the deployment process of the folding airbag was carried out. With the increase of underwater depth, under the same other conditions, the initial rate of gas mass inflow in the airbag decreased, the pressure drop rate inside the cylinder slowed down, and the inflation time was prolonged accordingly, which was 0.008 s on land and 1.392 1 s at 100 m underwater. At the same water depth, the smaller diameter of the pipeline would lead to a decrease in the mass flow rate of the gas flowing into the airbag, thereby significantly increasing the time required to reach the working pressure. That for 4 mm diameter was 0.365 7 s, and that for the 12 mm diameter was 0.040 6 s. In the initial stage of inflation, the pressure of the multi-folded airbag changed sharply, and the maximum pressure peak was 0.447 MPa, which was close to the working pressure of 0.452 MPa. The whole inflation process is divided into three stages:the initial stage, the middle stage and the later stage. The initial folding state of the airbag has the greatest influence on the initial stage. The simulation results show that the relationship between the time required for the airbag to fully unfold and the path is an exponential function. |
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