摘要
对某低速载重货车在匀速50km/h时仪表盘的振动数据进行了采集,通过频谱分析找到了引起仪表盘振动较大的频率。同时也对仪表板横梁进行了试验和仿真的模态分析,通过对比主要的模态振型,验证了有限元模型的正确性,也找到了引起仪表盘振动过大的原因。通过对驾驶室TB的模态分析可得,仪表横梁的振动位移大与刚度低是造成仪表盘振动较大的主要原因。于是提出了两种优化方案,对两种优化方案在相同工况进行了仿真分析,通过对比两种方案的结果,得方案二的效果更好。此优化方案为仪表横梁的后续优化与改进提供了方向。
The vibration data of the instrument panel was collected in a low-speed truck with speed 50 km/h,the larger vibration frequency of the instrument panel is found by spectral analysis. At the same time,the modal analysis of the test and Simulation of the instrument panel is also carried out,By comparing the main modal vibration mode,the correctness of the finite element model is verified,and also finding the cause of excessive vibration of the instrument panel. By modal analysis of the cab's TB,the vibration displacement and rigidity of the instrument cross beam are the main reasons for the vibration of the instrument panel. So,proposing two optimization schemes,the simulation analysis of two kinds of optimization schemes in the same condition is carried out,and by comparing the results of the two schemes we can know the effect of the scheme 2 is better.This optimization scheme provides the direction for the following optimization and improvement of the instrument cross beam.
引文
[1]周方明,颜益,苏晨.基ANSYS的汽车仪表板横梁焊接支架模态分析[J].武汉科技大学学报,2012(3):219-221.(Zhou Fang-ming,Yan Yi,Su Chen.Cross car beam welding blanket model analysis based on anasys[J].Journal of Wuhan University for Science and Technology,2012(3):219-221.)
[2]曹利,冯奇,张乐乐.双非线性隔振器的双层隔振系统模型的建立[J].噪声与振动控制,2008(2):1-3.(Cao Li,Feng Qi,Zhang Le-le.Model of a multi-stage isolation system with nonlinear protection devices[J].Noise and Vibration Control,2008(2):1-3.)
[3]宣海军,苏荣,江腾飞.汽车仪表板横梁系统固有振动特性研究[J].机械,2014(4):37-41.(Xuan Hai-jun,Su Rong,Jiang Teng-fei.Study on natural vibration characteristic of cross car beam system[J].Machinery,2014(4):37-41.)
[4]袁余星,郑松林,李应军.某商用车仪表板横梁模态和静刚度分析[J].机械设计与制造,2016(5):75-78.(Yuan Yu-xing,Zheng Song-lin,Li Ying-jun.Modal and static stiffness analysis for commercial vehicle’s ccb[J].Machinery Design&Manufacture,2016(5):75-78.)
[5]GB/T4970-2009汽车平顺性试验方法[S].(GB/T4970-2009.Method of running test-Automotive ride comfort[S].)
[6]蒋启成,王跃武,孟强.汽车排气系统的模态实验分析[J].机械设计与制造,2009(1):144-145.(Jiang Qi-chen,Wang Yue-wu,Meng Qiang.Modal analysis of a vehicle exhaust system[J].Machinery Design&Manufacture,2009(1):144-145.)
[7]徐飞,李传日,姜同敏.模态试验激励点与响应点优化分析[J].北京航空航天大学学报,2013(12):1654-1659.(Xu Fei,Li Chuan-ri,Jiang Tong-min.Optimization of excitation and measurement location inexperimental modal test[J].Journal of Beijing University of Aeronautics and Astronautics,2013(12):1654-1659.)
[8]曾发林,阮洋,李建康.基于Poly MAX的汽车驾驶室系统试验模态分析[J].郑州大学学报:工学版,2015,(3):54-58.(Zeng Fa-lin,Ruan Yang,Li Jian-kang.Experimental modal analysis of the cab system based on Poly MAX[J].Journal of Zhengzhou University:Engineering Science,2015(3):54-58.)
[9]高云凯,冯海星,马芳武.基于Poly MAX的声固耦合模态试验研究[J].振动与冲击,2013(2):158-163.(Gao Yun-kai,Feng Hai-xing,Ma Fang-wu.Coustic-structure coupled modal test based on Poly MAX[J].Journal of Vibration and Shock,2013(2):158-163.)
[10]蔡庆荣,董丹丹,夏建新.基于Isight的仪表板横梁优化[J].计算机辅助工程,2013(2):221-225.(Cai Qing-rong,Dong Dan-dan,Xia Jian-xin.Optimization on cross car beam based on isight[J].Computer Aided Engineering,2013(2):221-225.)
[11]王峰,邸金南,毛萍莉.镁合金汽车转向管柱支架结构分析及优化[J].机械设计与制造,2014(3):204-210.(Wang Feng,Di Jin-nan,Mao Ping-li.Structural analysis and optimization of magnesium alloy automotive steering column bracket[J].Machinery Design&Manufacture,2014(3):204-210.)
[12]庞剑.汽车车身噪声与振动控制[M].北京:机械工业出版社,2015.(Pang Jian.The Car Body Noise and Vibration Control[M].Beijing:China Machine Press,2015.)
