基于LS-DYNA的仪表板螺栓预紧力衰减研究  

Research of Instrument Panel Bolt Preload Attenuation Based on LS-DYNA

作　　者：刘保公 黄本韬 刘星驿 钟愉承 LIU Baogong;HUANG Bentao;LIU Xingyi;ZHONG Yucheng(GAC Automotive Research&Development Center,Guangzhou 511434,China;School of Physics and Mechanics,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]广州汽车集团股份有限公司汽车工程研究院,广东广州511434 [2]武汉理工大学物理与力学学院,湖北武汉430070

出　　处：《汽车实用技术》2025年第6期104-108,共5页Automobile Applied Technology

摘　　要：为了对车辆仪表板螺栓在振动作用下的预紧力衰减问题开展研究,文章通过前处理软件建立圆柱网格,导出后修改节点坐标,实现螺纹网格的建模。基于该网格建立了基于LS-DYNA的仪表板螺栓预紧力衰减有限元模型,并根据仪表板螺栓预紧力衰减台架实验验证了有限元模型的准确性。结果表明,加速度冲击振动会使仪表板螺栓预紧力产生较为显著的预紧力衰减,修改节点的螺栓网格建模方法适用于螺栓预紧力衰减仿真,有限元模型仿真结果误差在可接受范围内,具有工程应用价值。In order to study the attenuation of vehicle instrument panel bolts under vibration,this paper establishes the cylindrical grid through pre-processing software,and the node coordinates are modified to realize the modeling of the thread mesh.Based on the grid,the finite element model of preload attenuation of instrument panel bolt based on LS-DYNA is established,and the accuracy of the finite element model is verified by bench test of preload attenuation of instrument panel bolt.The results show that the acceleration shock vibration will make the bolt preload attenuate significantly.The modified node bolt grid modeling method is suitable for the simulation of bolt preload attenuate.The simulation error of finite element model is within the acceptable range,which has the engineering application value.

关 键 词：螺栓连接 仪表板 预紧力衰减 有限元仿真 台架试验 

分 类 号：U465[一般工业技术—材料科学与工程]