汽车排气消声器的实验与改进设计  

Experimental Study and Design of the Exhaust Muffler for Vehicle

作　　者：刘剑[1] 罗虹[1] 邓兆祥[1] 熊伟[1] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044

出　　处：《重庆大学学报（自然科学版）》2003年第3期126-129,共4页Journal of Chongqing University

摘　　要：通过消声器的插入损失实验 ,分析了微型车消声器消声后的声音频谱特征 ,识别出未被消声器抑制的有害噪声源。建立了该消声器的有限元模型 ,利用ANSYS分析软件 ,对消声器的声结构进行了声场分析 ,获得了该消声器的消声频谱特征。基于实验和数值分析结果 ,并根据抗性消声理论改进了该消声器的结构参数及布置形式 ,设计出一种新型抗性消声器。对新设计的消声器的消声性能进行台架实验验证。结果表明 ,设计的消声器消声量提高 3～ 5dB .By the experimental study of noise loss, this paper analyzes the noise frequency characters through the muffler and identified and the bad noise not have been restrained by muffler. The elemental model of the muffler is made. With ANSYS, the acoustic field of the muffler is analyzed and the noise frequency characters of muffler are gotten. Based on the data of the experiments and numerical analysis, the parameters of structure and shape are gotten through the theory of fastness noise elimination. A new type acoustic impendence muffler is designed. The performance of the new designed muffler is validated by the experiments. The result indicates that the amount of noise elimination increase 3～5 dB.

关 键 词：消声器 实验研究 噪声控制 数值分析 

分 类 号：U467.48[机械工程—车辆工程]