锥形扩张式消声器的声学模型  

Acoustic Model of Cone-shaped Expansion Muffler

作　　者：王嘉[1] 李孔清[1] 洪娜[1] 张坻 王丹凤[1] 

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《矿业工程研究》2017年第1期60-66,共7页Mineral Engineering Research

基　　金：湖南教育厅科研资助项目(15C0541);湖南科技大学教育科学研究资助项目(G31401)

摘　　要：基于一维平面波理论,推导得出了锥形扩张式消声器各消声单元对应的传递矩阵和该类消声器的噪声传递损失理论计算公式.将球形消声器过渡段视为有限个锥形段,利用本文提出的计算公式,近似计算了球形扩张式消声器的噪声传递损失,得到了2类消声器的噪声传递损失频率特性.同时,应用有限元仿真软件Visual lab 11.0对这2类消声器进行了仿真计算.理论推导的计算公式结果与有限元计算结果吻合一致,验证了本文推导的消声器传递损失模型的准确性.文中提出的理论公式具有较高的精度,可避免有限元的专业计算,为这2种类型消声器的设计与优化提供简化计算方法.Based on the one-dimensional plane wave theory, the corresponding transfer matrix of each of the cone-shaped expansion muffler and the theoretical calculation formulas of the transmission loss of the muffler are derived. The transition section of the spherical muffler is regarded as a finite conical section, using in this paper. The approximate transmission loss of the spherical expansion muffler is calculated, and the frequency characteristics of the noise transmission loss of the two kinds of muffler are obtained. Besides, the finite element simulation software Visual lab 11.0 is used to simulate the two types of mufflers. The results calculated by the theoretical derivation are in agreement with the finite element calculation results, which verify the accuracy of the model of the muffler transmission loss derived in this paper. The theoretical formulas presented in this paper are of high precision, which can avoid the professional calculation of the finite element, and provide a simplified calculation method for the design and optimization of these two types of mufflers.

关 键 词：声学 扩张室消声器 传递损失(TL) 有限元法 传递矩阵法 声学特性 

分 类 号：TB535.2[理学—物理]