动力吸振器在轿车低频轰鸣声控制中的应用

摘要

The characteristics of rear seat booming noise and transfer path sensitivity of the test car are analyzed, which confirm that the 2nd order vibration is diagnosed to be the main source of the rear seat booming noise, and this vibration is transferred through the rear mounting point to the body. Therefore, the method of installing a tuned mass damper (TMD) at the rear mounting point of front subframe to decrease the vibration from the engine is proposed, the method is verified by hammer test and vehicle road simulation test, which show that the installation of a TMD at the rear mounting point of front subframe can effectively restrain the low frequency booming noise at the rear seat when the engine speed reaches 2 040 r/min.%针对某试验车后排右侧乘员处低频轰鸣声的特性及传递路径灵敏度进行了分析，确定发动机的2阶振动是该低频轰鸣声的主要贡献，是通过发动机的后悬置点传递到车身而引起的。提出了安装动力吸振器来减小发动机后悬置点处对振动传递的方法，并通过锤击试验和整车道路模拟试验表明，在该车前副车架后悬置点处安装动力吸振器，能够有效抑制其发动机转速为2040 r/min时后排产生的低频轰鸣声。