汽车排气消声器三维声场分析  

Analysis of Three-dimensional Sound Field of Automobile’s Exhaust Mufflers

作　　者：袁守利[1,2] 辛超[1,2] 刘志恩[1,2] 肖生浩[1,2] 

机构地区：[1]武汉理工大学汽车工程学院,武汉430070 [2]现代汽车零部件技术湖北省重点实验室,武汉430070

出　　处：《噪声与振动控制》2014年第1期113-117,共5页Noise and Vibration Control

基　　金：国家科技支撑计划-生物燃气净化提纯技术装备及城市公交系统应用研究(基金编号:2012BAC18B02)

摘　　要：采用三维有限元法对某车型排气消声器进行优化设计,根据传递导纳理论对消声器穿孔管和穿孔板进行处理,建立数值模型并进行三维声场仿真分析,获得主副消声器总成的传递损失;运用双负载四传声器法测试消声器传递损失,测试结果表明三维有限元法预测消声器声学性能有较高的精度,根据仿真结果和消声器设计原理,对主消声器进行优化,可提高排气系统声学性能,满足汽车噪声排放法规的要求。Three- dimensional finite element method is used to optimize the design of a vehicle’s exhaust mufflers.Based on the transfer admittance theory, behaviors of the perforated pipe and the perforated plate of a muffler are analyzed.The numerical model is established and the three- dimensional acoustic fields of the primary and secondary mufflers aresimulated and analyzed, and their transmission losses are obtained. Then, the transmission losses of the primary andsecondary mufflers are measured with the double-load and four-microphone method. The experiment results show that thethree-dimensional finite element method has high accuracy to predict the muffler’s acoustic performance. According to thesimulation results and the principle of muffler’s design, the primary muffler is optimized, and the acoustic performance ofits exhaust system is improved. The demands of laws and regulations for the vehicle’s noise emission limitation aresatisfied.

关 键 词：声学 排气消声器 三维有限元 传递损失 

分 类 号：TB5[理学—物理]