摘要
为了优化轮胎模态试验方法,得到精确的轮胎模态参数,开展对比试验研究,经过大量模态试验数据的对比,结合LMS Test Lab,研究模态试验3要素的选用原则,即测点布置、边界约束和激励形式的选取方式。试验结果表明:(1)对轮胎单一胎面进行模态测量,存在模态遗漏现象,且轴向与径向阵型易混淆,因此须进行轮胎3胎面(内胎面、正胎面、外台面)布点测量;(2)胎面整周少于36个测点时,轮胎高阶次花瓣阵型难以清晰呈现,因此须于3个胎面等角度间隔平行布置36×3个测点;(3)轮胎处于整车安装离地状态受激励时,支撑位移量微小,优于软绳约束状态;(4)激振器激励信号相干系数达到1,优于力锤锤击信号,并且使试验进行更加便捷与高效。根据以上结果提出一种新的轮胎模态测试方法,并应用此方法得到准确的轮胎模态参数,研究结果可为轮胎噪声与振动控制提供依据。
In order to optimize the tire modal test method and obtain the precise parameters of the tire modal, comparative test and analysis are performed. Through the mutual comparison of large amount of experimental data of the modal test by adopting LMS Test Lab, the selection principle of measurement point layout, boundary constraint condition and incentive form is studied. The results show that (1) Single surface measurement may easily lead to modal parameters lose and modal shape confusion, therefore, the measurement point layouts in three tire surfaces (the inner, front and outer surfaces) are necessary;(2) The high order modal shape is not clear with less than 36 measurement points around one tire circle only, so each tire surface must be arranged by equally spaced 36 measurement points, and there are totally 36 × 3 measurement points;(3) The tire should be installed on the vehicle and free from the ground, the support displacement in this state is very small, this is better than soft rope constraint;(4) The signal coherence coefficient of the exciter reaches 1. It is better than hammering signal and makes the experiment more convenient and efficient. This study presents a new method for tire modal testing, and using this method can obtain the precise parameters. The results provide a fundamental basis for the noise and vibration control of tires.
作者
宫少琦
王晖
朱健
郭风晨
施长宏
GONG Shaoqi;WANG Hui;ZHU Jian;GUO Fengchen;SHI Changhong(Brilliance Auto R & D Center, Shenyang 110141, China)
出处
《噪声与振动控制》
CSCD
2019年第1期99-102,共4页
Noise and Vibration Control
基金
国家自然科学基金资助项目(51641404)
辽宁省教育厅科技研究资助项目(L2015218)
关键词
振动与波
轮胎
模态分析
固有频率
vibration and wave
tire
modal analysis
natural frequency
作者简介
宫少琦(1986-),女,河北省深州市人,硕士,主要研究方向为汽车NVH性能分析与优化。E-mail: shaoqi.gong@brilliance-auto.com.
