激光多普勒测振仪在汽车零部件模态分析中的应用
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摘要
研究了激光多普勒测振仪在汽车零部件模态分析中的应用。创新地提出了一种非接触式的振动测量方法,相对于传统的测量方法具有响应频带宽、速度分辨率高、测量时间短以及可实现远距离测量等优点。基于激光多普勒测振技术,以汽车车门为研究对象,进行了敲击试验数据采集及模态分析,获得了车门的前6阶模态参数,并进行了车门网格建模及约束布置,根据所计算的频响函数,得到了车门的前6阶模态振型,结合汽车外界激励标准及所得模态参数,满足了该车门的模态特性评估要求,体现了激光测振仪在汽车NVH研究上的应用优势及广阔的应用前景。
This paper studies the application of laser doppler vibrometer(LDV) in modal analysis of auto parts. A non-contact vibration measurement method is proposed, which has the advantages of response frequency bandwidth,high speed resolution, short measurement time and long-distance measurement compared with the traditional measurement methods. Based on the laser Doppler vibration measurement technology, taking the automobile door as the research object, the tapping test data acquisition and modal analysis are carried out, and the first six modes of the door parameters are obtained, and the door grid modeling and constraint layout are carried out. According to the calculated frequency response function, the first six modes of the door are obtained. Combined with the external excitation standard and the obtained modal parameters, the door modal characteristic evaluation requirements are satisfied. The advantages and broad application prospects of laser vibrometer in automotive NVH(Noise Vibration and Harshness)are proposed.
This paper studies the application of laser doppler vibrometer(LDV) in modal analysis of auto parts. A non-contact vibration measurement method is proposed, which has the advantages of response frequency bandwidth,high speed resolution, short measurement time and long-distance measurement compared with the traditional measurement methods. Based on the laser Doppler vibration measurement technology, taking the automobile door as the research object, the tapping test data acquisition and modal analysis are carried out, and the first six modes of the door parameters are obtained, and the door grid modeling and constraint layout are carried out. According to the calculated frequency response function, the first six modes of the door are obtained. Combined with the external excitation standard and the obtained modal parameters, the door modal characteristic evaluation requirements are satisfied. The advantages and broad application prospects of laser vibrometer in automotive NVH(Noise Vibration and Harshness)are proposed.
引文
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[2]雷正保,易晓剑.电动汽车碰撞安全性与NVH多目标拓扑优化[J].中国公路学报,2016,29(5):144-150.
[3]何智成,尹瑞林,郝耀东.基于传递路径分析的动力传动系统NVH性能匹配研究[J].汽车工程,2017,39(3):343-350.
[4]李枝军,吴晓超,徐秀丽,等.大跨桥梁行车振动测试与舒适性分析[J].振动与冲击,2014,33(21):213-217.
[5]单泽涛,单泽彪,梁龙凯,等.基于声矢量传感器阵的汽车加速噪声源方位辨识[J].吉林大学学报(信息科学版),2013(4):340-345.
[6]NIE Xiaoming,ZHOU Jian,LONG Xingwu.Laser Doppler velocimeter for vehicle application with improved signal-tonoise ratio[J].Applied Physics B:Lasers&Optics,2014,116(3):637-641.
[7]BEYEA J A,ROHANI S A,LADAK H M,et al.Laser Doppler vibrometry measurements of human cadaveric tympanic membrane vibration[J].Journal of Otolaryngology-Head&Neck Surgery,2013,42(1):17.
[8]崔笛,张文,应义斌.激光多普勒测振技术在农产品品质检测中的应用[J].农业机械学报,2013,44(7):160-164.
[9]SAXENA S,SHARMA R,PANT B D.Dynamic characterization of fabricated guided two beam and four beam cantilever type MEMS based piezoelectric energy harvester having pyramidal shape seismic mass[J].Microsystem Technologies,2017(2):1-12.
[10]白蕊霞,王斌永,童鹏.激光多普勒测速雷达技术研究现状[J].激光与红外,2016(3):249-253.
[11]夏云峰,杨二卫,田冠男.汽车进气系统声学模态仿真和试验[J].计算机辅助工程,2015,24(1):18-21.
[12]殷俊,张冰蔚,周鑫,等.汽车排气系统模态仿真与试验分析[J].江苏科技大学学报(自然科学版),2017,31(2):167-171.
[13]陈海潮.重型商用车驾驶室模态分析与拓扑优化研究[D].长春:吉林大学,2009.
[14]张深逢,李路可,陈士钊,等.多普勒三维激光运动姿态测量技术[J].光电工程,2016,43(11):33-37.
[15]何正嘉.机械故障诊断理论及应用[M].北京:高等教育出版社,2010.
[16]杨年炯,钱立军,关长明.某轿车白车身模态分析[J].机械设计与制造,2010(2):235-237.