轿车乘坐室轰鸣声的分析与控制研究  

Analysis and Control Research of Booming Noise in Car′s Passenger Compartment

作　　者：赵静[1] 周鋐[1] 梁映珍[1] 

机构地区：[1]同济大学

出　　处：《汽车技术》2009年第10期16-20,共5页Automobile Technology

摘　　要：根据轰鸣声产生的机理,分析了某型轿车乘坐室内轰鸣声的特性、发动机隔振特性、乘坐室各壁板的振动特性以及顶棚模态试验和空腔声学模态,明确了该轰鸣声主要是由发动机二阶振动通过悬置传递到车身,并激励乘坐室顶棚结构振动和空腔声学模态耦合所致。提出了采用加强顶棚刚度来改变顶棚结构振动的固有频率并抑制其振幅的方法,以此削弱耦合作用。试验结果表明,该方法可有效控制轰鸣声。This paper analyzed the property of a car＇s booming noise, features of engine vibration isolation, vibration property of wall panel inside the passenger compartment as well as roof modal test and the cavity acoustic modal in accordance with the mechanism of booming noise, it was discovered the booming noise is produced mainly by engine second-order vibration which is transferred from suspension to vehicle body and excites roof vibration coupled with cavity acoustic mode. It was proposed to enhance the stiffness of roof in order to modify the natural frequency of roof vibration and to restrain the amplitude of roof vibration, thus weakening the effect of coupling. It was validated to be effective to control booming noise through experiment.

关 键 词：轿车 乘坐室 轰鸣声 控制 

分 类 号：U461.4[机械工程—车辆工程]