轮胎声振模态试验方法研究

Experimental method of tire acoustic vibration mode

为了优化轮胎模态试验测试方法,开发一种新型轮胎模态测试方法——声振模态试验.为验证声振模态数据的可靠性,选取同一条轮胎分别进行EMA(Experimental Modal Analysis)模态测试和声振模态测试,用LMS数据采集软件进行数据的采集与分析,将得到的声振模态测试数据与EMA模态测试数据进行对比分析.试验结果表明:轮胎声振模态测试结果与EMA模态测试结果之间一致性较好;用麦克风代替加速度传感器,可以克服加速度传感器的附加质量对轮胎模态测量结果的影响,缩短轮胎模态测试时间,提高工作效率;声振模态测试更容易识别轮胎的空腔模态;EMA模态测试对重根模态的识别存在遗漏,在轮胎重根模态的识别上,声振模态测试方法优于EMA模态测试方法.

In order to optimize the tire modal test method,a new acoustic vibration modal test is developed.In order to verify the reliability of acoustic and vibration modal data,the same tire was selected for EMA(Experimental Modal Analysis)modal analysis and acoustic vibration modal test respectively.LMS data acquisition software was used for data acquisition and analysis,and the obtained acoustic vibration modal test data was compared with EMA modal test data.The test results show that:the results of tire acoustic vibration modal test are in good agreement with those of EMA modal test;using microphone instead of acceleration sensor can overcome the impact of additional mass of acceleration sensor on tire modal test results,shorten the tire modal test time and improve the work efficiency;acoustic vibration modal test is easier to identify the cavity mode of tire;in the identification of multiple root mode,the acoustic vibration modal test method is better than the EMA modal test method.