某纯电动轿车车内轰鸣实验分析及改进研究

Experimental Analysis and Improvement of a BEV′s Interior Booming Noise

在某纯电动轿车NVH性能开发过程中,试验车在粗糙路面出现车内噪声过大并有明显的轰鸣感,主观驾评中该问题列为不可接受,严重影响客户乘车舒适性。为此通过试验识别车内轰鸣特性,在路径上对各零部件进行诊断,锁定了顶盖为轰鸣感主要贡献源。针对顶盖轰鸣现象,借助有限元分析方法对顶盖局部结构进行增强优化设计,最终对车内轰鸣有所改善并提升乘车舒适性。该研究对纯电动轿车车内轰鸣识别排查及改进提供了一定的指导价值。

In the course of NVH performance development of a BEV,The noise inside the test vehicle is too loud and has obvious Booming sense on the rough road surface,This problem is listed as unacceptable in subjective driving evaluation,which seriously affects the ride comfort of customers.Therefore,the main contribution of the roof to the Booming is to identify the characteristics of the interior of the vehicle,diagnose the components in the path,and lock the roof as the main contribution source.In view of the roof Booming,the damping topology optimization of the local structure of the roof is carried out with the aid of the finite element analysis method,so as to improve the interior noise and ride comfort.This study provides some guidance value for the identification and improvement of the interior Booming of BEV.