某车型抖动轰鸣问题的分析与改进
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摘要
针对某SUV车型车内抖动轰鸣声进行问题分析,查找出其动力传动系统的一阶模态是引起该车内抖动轰鸣的主要原因,根据有限元模型仿真的模态特性设计出主减及副车架的液压衬套动刚度和阻尼特性,并通过试验验证了该液压衬套对车内轰鸣声的改善效果,改进后车内传动系统阶次噪声最大降低了10dB。结果表明,通过改进主减和后副车架的安装衬套的动刚度和阻尼特性,实现对抖动轰鸣噪声的抑制,为前置后驱车型汽车NVH性能优化提供了可靠的参考方法。
This paper studied on a SUV jittering and roaring issue, and found out its power transmission system of the first order modal was the main cause of the problem. According to the FEM modal characteristics, the final drive reducer and sub-frame hydraulic bushing's dynamic stiffness and damping characteristics were optimized, and was verified by NVH test.Test results showed that the improved driving system's first order noise reduces the largest 10 dB. It made known that by improving the dynamic stiffness and damping characteristics of the mounting bushings of the final drive reducer and rear sub-frame, the jittering and roaring noise can be suppressed, which provides a reliable reference method for the performance optimization of the front engine rear drive vehicle NVH.
This paper studied on a SUV jittering and roaring issue, and found out its power transmission system of the first order modal was the main cause of the problem. According to the FEM modal characteristics, the final drive reducer and sub-frame hydraulic bushing's dynamic stiffness and damping characteristics were optimized, and was verified by NVH test.Test results showed that the improved driving system's first order noise reduces the largest 10 dB. It made known that by improving the dynamic stiffness and damping characteristics of the mounting bushings of the final drive reducer and rear sub-frame, the jittering and roaring noise can be suppressed, which provides a reliable reference method for the performance optimization of the front engine rear drive vehicle NVH.
引文
[1]向伟,传动系统扭振引致微车低频轰鸣问题的诊断方法研究[D].重庆:西南交通大学,2016.
[2]袁守利,尹凡,刘志恩,某SUV车内低速轰鸣的分析与优化[J].江苏大学学报(自然科学版,2018,39(4):397~402.
[3]王昆,苏彬,吉丽超等,传动系统扭振对MPV车内轰鸣声影响的控制研究[J].噪声与振动控制,2018,38(2):77~82.
[4]邓磊,段龙杨,刘波,后驱车动力传动系统扭振分析[J].噪声与振动控制,2018,38(4).
[5]李小珊,韦宝侣,张庆等,基于悬架非线性特性的稳定杆连杆建模方法研究[J].汽车工程,2018,40(6):699~705.
[6]郝耀东,不确定汽车动力传动系统低频NVH性能分析与优化[D].湖南大学,2018.
[2]袁守利,尹凡,刘志恩,某SUV车内低速轰鸣的分析与优化[J].江苏大学学报(自然科学版,2018,39(4):397~402.
[3]王昆,苏彬,吉丽超等,传动系统扭振对MPV车内轰鸣声影响的控制研究[J].噪声与振动控制,2018,38(2):77~82.
[4]邓磊,段龙杨,刘波,后驱车动力传动系统扭振分析[J].噪声与振动控制,2018,38(4).
[5]李小珊,韦宝侣,张庆等,基于悬架非线性特性的稳定杆连杆建模方法研究[J].汽车工程,2018,40(6):699~705.
[6]郝耀东,不确定汽车动力传动系统低频NVH性能分析与优化[D].湖南大学,2018.