基于OTPA的高速车内嗡嗡噪声诊断与优化

Diagnosis and Optimization of High-speed Hum Noise of Vehicle Inside Based on OTPA

通过OTPA方法识别某车辆在高速行驶时车内出现嗡嗡噪声,结果显示主要贡献来自4个转向节。其异常振动来自特定车速下轮毂轴承阶次振动与轮胎声腔振动耦合,通过优化轮辋结构加强轮辋侧向刚度并实车验证,车内嗡嗡声问题得到明显改善。

Through OTPA method to identify the hum noise source of a vehicle in high-speed running,which the result shows that the main contribution comes from four steering knuckles.The abnormal vibration of the knuckles is due to the coupling of the wheel hub bearing order vibration and tire cavity vibration at a specific vehicle speed.By optimizing the wheel rim structure to enhance the lateral stiffness and conducting on-vehicle verification,the hum noise of the vehicle inside is significantly improved.