›› 2014, Vol. 34 ›› Issue (1): 113-117.

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

  

  • Received:2013-04-08 Revised:2013-05-16 Online:2014-02-18 Published:2014-02-18

汽车排气消声器三维声场分析

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  1. （ 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 ）
  • 通讯作者: 辛超
  • 基金资助:

    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

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Abstract:

Three-dimensional finite element method is used to optimize the design for a vehicle exhaust muffler. Based on the transfer admittance theory, muffler perforated pipe and the perforated plate are processed. The numerical model is established and three-dimensional acoustic field of the primary and secondary mufflers are simulated and analyzed, then got their transmission loss; The Transmission loss of the primary and secondary mufflers are measured with the method of double load based on four microphone, the experiment results show that the Three-dimensional finite element method have high accuracy to predict the mufflers acoustic performance. According to the simulation results and principle of the muffler design, the primary muffler is optimized, which can improve the exhaust system acoustic performance, and make it meet the requirements of vehicle noise emission regulations.

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。

关键词: 声学, 排气消声器, 三维有限元, 传递损失

CLC Number: