摘要
改善车内轰鸣声是提升汽车驾乘舒适性的重要课题之一。文章介绍了轰鸣声产生原理,并结合实例,在车型数字设计阶段,通过有效的理论计算和CAE分析技术确认实车轰鸣声是由副车架2阶振动引起。文章采用增加动力吸振器的方案,通过试验验证,有效地解决了加速轰鸣声问题,使整车在2 500 r/min峰值处降低了4 dB(A),并满足了车型项目的开发日程。
The Solution of booming is an important subject to improve NVH quality for a vehicle. This article introduces the principle of booming appearance. Based on practical cases, that the booming is caused by 2 order of sub frame vibration is found out by means of effective theoretical calculation and CAE analysis in digital model design. The test results show that applying the dynamic vibration absorber, the peak noise is minimized by 4 dB （A） at 2 500 r/min, which effectively minimized the booming noise when accelerates and met the project development schedule.
出处
《汽车工程师》
2014年第7期37-39,共3页
Automotive Engineer
基金
广州市科技计划项目(2014J4300027)资助
关键词
汽车
轰鸣声
声腔模态
动力吸振器
Vehicle
Booming noise
Cavity mode
Dynamic vibration absorber
