ACM焊点模型对轿车车身整体一阶扭转模态的影响分析.pdfVIP

汽车科技/ AUTO SCI—TECH 2013 年第5 期 doi:10.3969/j.issn.1005-2550.2013.05.012 收稿日期：2013-06-30 ACM焊点模型对轿车车身整体 一阶扭转模态的影响分析 夏汤忠，刘文华，陆志成 （神龙汽车有限公司 技术中心整车部，武汉 430056） 摘要：本文研究了不同网格尺寸结合ACM 焊点对车身典型结构件、车身整体一阶扭转固有频率（刚度）的影响。得出 ACM 焊点局部连接范围是影响车身整体一阶扭转模态特性的主要因素，为采用不同网格尺寸的计算模型与实验结果建立 良好相关性提供了非常有价值的计算分析依据。同时，为各类分析模型采用统一的网格尺寸提供了技术解决方向和途 径。 关键词：白车身整体模态；焊点接触区域；网格尺寸；ACM 焊点 中图分类号：O242.212 文献标识码： A 文章编号：1005-2550（2013）05-0046-05 The Analysis of the Influence of ACM Spotfor Whole BodyFirst-order Torsional Mode XIATang-zhong, LIU Wen-hua, LUZhi-cheng (DongfengPeugeotCitroen Automobile CompanyLtd,Wuhan 430056,China) Abstract: In the article, the effect of ACM spot combined different mesh size for typical body structure natural fre- quency was studied, then the same method was used to analyze the influence of ACM spot for body in white first-order torsional natural frequency. The conclusion was got that the main factor affecting overall first-order torsion modal character- istics was local connection scope of ACM spot, all that can provide valuable calculation basis for establishing good correla- tion between calculation model with different size and test results . At the same time, the direction and the way can be provided to solve all kinds ofanalysis modelusing auniform meshsize. Key words: wholemode of body in white; spot connection scope; mesh size;ACMspot 夏汤忠 型。对于由几千个焊点连接而成的车身来说，焊点的有限元建 毕业于西北工业大学空气动力学专业，现