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| 汽车碰撞仿真研究中点焊连接关系的有限元模拟 | |
| 引用本文： | 何文,张维刚,钟志华. 汽车碰撞仿真研究中点焊连接关系的有限元模拟[J]. 机械工程学报, 2005, 41(9): 73-77 |
| 作者姓名： | 何文 张维刚 钟志华 |
| 作者单位： | 湖南大学现代车身技术教育部重点实验室,长沙,410082;湖南大学现代车身技术教育部重点实验室,长沙,410082;湖南大学现代车身技术教育部重点实验室,长沙,410082 |
| 基金项目： | 国家973基础研究(2004CB719402)国家自然科学基金(10372029,59375196)资助项目。 |
| 摘 要： | 在汽车有限元分析仿真计算中，结构中的点焊模拟一直是一个难以解决的问题。综合现有的模拟方法，对点焊提出了一种新的处理对策，即在焊接节点之间引入一个刚性梁单元，单元可承受拉伸力和剪切力，同时引入节点耦合技术，在计算焊接节点受力的时候将节点位移约束作为惩罚项添加进去。当单元内部受力超过点焊的实际承载能力时，焊点脱开，单元自动分解为两部分，且分解后自动进入接触搜寻处理系统。 |
| 关 键 词： | 汽车碰撞仿真 点焊 有限元模拟 |
| 修稿时间： | 2004-10-18 |
FINITE ELEMENT MODELING OF SPOT-WELDING IN DYNAMIC SIMULATION OF AUTOMOBILES |
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| He Wen,Zhang Weigang,Zhong Zhihua. FINITE ELEMENT MODELING OF SPOT-WELDING IN DYNAMIC SIMULATION OF AUTOMOBILES[J]. Chinese Journal of Mechanical Engineering, 2005, 41(9): 73-77 | |
| Authors: | He Wen Zhang Weigang Zhong Zhihua |
| Affiliation: | Key Laboratory of Advanced Technology for Vehicle Body Design & Manufacture of Ministry of Education, Hunan University |
| Abstract: | The simulation of spot-welding structure remains to be a critical problem when building the finite element model of an automobile body. A new technology of simulation of spot-welding is presented. The spot-welding is treated as a rigid beam element, which can treat the normal force and shear force. As a penalty, the node-coupling method is introduced to compute the forces of spot-welding nodes. When spot-welding node force meets the failure criterion, nodes of the weld are separated from each other, and the rigid beam is removed from the calculation. |
| Keywords: | Dynamic simulation Spot-welding Finite element model |
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