噪声与振动控制Issue(1)：156-159,175,5.DOI:10.3969/j.issn.1006-1335.2015.01.032
消声器中频声学性能的计算测量方法
Computational and Measurement Methods of Middle-frequency Acoustic Performance of Mufflers
摘要
Abstract
The traditional calculation and measurement methods of the transmission loss of mufflers are based on the assumption of plane wave propagation in the inlet and outlet ducts. These methods are not valid any more to predict the acoustical performance of mufflers when the three-dimensional sound field excited by the higher-order modes occurs in inlet and outlet ducts. In this paper, a method was proposed to calculate the acoustic performance of mufflers by adding radial panels in the inlet and outlet ducts. Therefore the plane wave decomposition method could still be used to predict the transmission loss of the mufflers until the second higher order modal frequency occurred. This method was then applied to calculate the transmission loss of an intake filter muffler, and the computation results agreed well with the experimental results and conventional finite element prediction, which confirmed the applicability of the method. A test-bench for middle frequency acoustic performance of mufflers was designed, and the plane wave decomposition method was employed to measure the transmission loss of a dissipative muffler. The measurement result and finite element numerical result are in good agreement generally.关键词
声学/消声器/中频声学特性/传递损失Key words
acoustics/muffler/middle-frequency acoustical performance/transmission loss分类
通用工业技术引用本文复制引用
李海龙,季振林,闫欣..消声器中频声学性能的计算测量方法[J].噪声与振动控制,2015,(1):156-159,175,5.基金项目
国家自然科学基金资助项目 （）
