摘要
通过有限元分析法,对某铝合金白车身结构总成进行了模拟分析。白车身弯曲刚度为8571N/mm,扭拧刚度为22575N·m,并分析了白车身的前五阶模态,其第一阶模态频率为25.4Hz,处于发动机激励范围之内。因此,以除了第一阶模态频率外的其它各阶固有频率作为约束函数对白车身内板材进行第一阶模态灵敏度分析,并以灵敏度计算结果对板材进行了厚度优化,铝合金白车身的第一阶模态频率上升至30.0Hz,脱离了发动机激励范围,提高了白车身的NVH性能。
In this paper,the structural assembly of an aluminum alloy BIW is simulated and analyzed by finite element analysis method.The bending stiffness of BIW is 8571N/mm and the torsional stiffness is 22575N·m.The first five modes of BIW are analyzed.The first mode frequency is 25.4Hz,which is within the excitation range of the engine.Therefore,the first-order modal sensitivity of the inner plate of the aluminum alloy BIW is analyzed with the natural frequencies of other orders except the first-order modal frequency as the constraint function,and the thickness of the plate is optimized with the sensitivity calculation results.The first-order modal frequency of the aluminum alloy BIW rises to 30.0Hz,which is out of the excitation range of the engine.
作者
李洪林
李勤
吴昊
霍英妲
李文溢
王东辉
Li Honglin;Li Qin;Wu Hao;Huo Yingda;Li Wenyi;Wang Donghui(Shenyang University of Technology School of Chemical Equipment,Liaoyang 111000, China;Liaoning Zhongwang Group Co., Ltd., Liaoyang 111000,China)
出处
《有色金属加工》
CAS
2022年第3期37-40,共4页
Nonferrous Metals Processing
基金
辽宁省‘兴辽英才计划’项目资助(XLYC1908014)。
关键词
白车身
弯曲刚度
扭拧刚度
模态分析
灵敏度
有限元分析
BIW
bending stiffness
torsional stiffness
modal analysis
sensitivity
finite element analysis
