汽车底盘加装功能性护板对噪声控制分析

振动与噪声问题是影响汽车乘坐舒适性的重要因素,车辆行驶时轮胎—路面噪声、风激励噪声、动力传动系统等产生噪声都不可避免地传到车内。为提高车内人员的乘坐舒适性和降低汽车的通过噪声,提出采用GMT材料在汽车底盘处加装功能性护板,给出两种能够吸收噪声的底盘功能性护板方案;建立控制整体噪声的系统模型,达到减少车内噪声和通过噪声的目的。对总体设计方案和实际应用时需考虑相关因素进行分析。

Study on Noise Control of Adding Protection Plate to Automobile Chassis

The vibration and noise problem is an important factor affecting the vehicle riding comfort. When the vehicle is traveling, the tire-road noise, wind noise and noise generated by power system are inevitably transmitted to the vehicle interior. To improve the riding com- fort of the driver and reduce the noise of the car pass-by, GMT material was used to make protection plate which was installed at the car chas- sis cover. Two kinds of chassis protection plate cover programs were propose by which noise could be absorbed. A system model to control the overall noise was established to reduce interior noise and pass-by noise. Overall design program and relevant factors should be taken into ac- count were analyzed.