| 基于壳单元的侧碰移动可变形壁障研究 |
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| 引用本文： | 赵敏,钟志华,周泽,陈少伟,周利辉. 基于壳单元的侧碰移动可变形壁障研究[J]. 机械工程学报, 2011, 47(22). DOI: 10.3901/JME.2011.22.112 |
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| 作者姓名： | 赵敏 钟志华 周泽 陈少伟 周利辉 |
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| 作者单位： | 湖南大学汽车车身先进设计制造国家重点实验室 长沙410082 |
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| 基金项目： | 教育部长江学者与创新团队发展计划(531105050037); 湖南大学汽车车身先进设计制造国家重点实验室自主研究课题(60870002)资助项目 |
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| 摘 要： | 采用壳单元技术,参照蜂窝铝的真实窝孔结构,建立基于壳单元的侧碰移动可变形壁障(Moving deformable barrier,MDB)有限元模型;针对1∶1尺寸建模导致模型规模过大的问题,进行窝孔及单元尺寸等比例扩大,将单元规模缩减到原来的1/5;应用静态异面压缩仿真,对单元厚度与压缩强度进行参数化研究,合理匹配窝孔及单元尺寸扩大之后的单元厚度,确保模型缩放前后的静态压缩力学性能达到一致;针对动态试验压缩强度大于静态试验的现象,采用简易气囊模拟MDB窝孔中空气受压缩的率效应;结合侧碰试验中的蜂窝铝失效现象,设置铝箔的材料失效以及铝箔、前面板之间粘胶的材料失效;对所建立的壳单元MDB模型进行零部件级别与整车级别的试验验证,结果表明壳单元MDB模型具有很高的精度。
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| 关 键 词： | 侧碰 移动可变形壁障 蜂窝铝 壳单元 单元缩减 简易气囊 材料失效 |
Research on Moving Deformable Barrier Model Based on Shell Element |
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| ZHAO Min,ZHONG Zhihua,ZHOU Ze,CHEN Shaowei,ZHOU Lihui. Research on Moving Deformable Barrier Model Based on Shell Element[J]. Chinese Journal of Mechanical Engineering, 2011, 47(22). DOI: 10.3901/JME.2011.22.112 |
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| Authors: | ZHAO Min ZHONG Zhihua ZHOU Ze CHEN Shaowei ZHOU Lihui |
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| Affiliation: | ZHAO Min ZHONG Zhihua ZHOU Ze CHEN Shaowei ZHOU Lihui(State Key Laboratory of Advanced Design and Manufacture for Vehicle Body,Hunan University,Changsha 410082) |
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| Abstract: | A finite element model of moving deformable barrier(MDB) based on shell element is built by applying the shell element technology according to real structure of the honeycomb.For the situation of huge number of elements caused by shell element modeling as the same size of physics state,cell size and element size is enlarged by the identical scale,which reduce the number of elements significantly.The out-of-plane compression simulation is executed to obtain the relationship between the thickness of shell ele... |
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| Keywords: | Side impact Moving deformable barrier Honeycomb Shell element Size scaling Simple airbag Material failure |
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