噪声与振动控制2017，Vol.37Issue(5)：189-192,4.DOI:10.3969/j.issn.1006-1355.2017.05.039
消声器传递损失计算的单元能量叠加法
Element Energy Superposition Method for Transmission Loss Prediction of Silencers
摘要
Abstract
The high-order modals are excited above the plane wave truncation frequency of the silencer's inlet and outlet pipes. Therefore, the traditional method to calculate the transmission loss of the silencer is no longer applicable since it assumes that it is the plane wave which propagates in the inlet and outlet pipes. In the present paper, by using the finite element method, the inlet and outlet sections are divided into several elements and the sound field distribution on each element is approximated as plane wave. Then, the method for calculating the transmission loss of the muffler is established based on the element energy superposition. Three kinds of silencers are chosen to calculate the transmission loss by using the present method and Virtual Lab Acoustics code, and their non-plane wave behaviors are analyzed. The results show that the present method is feasible and can effectively consider the influence of the non-plane wave.关键词
声学/消声器/传递损失/非平面波/有限元法/单元能量叠加Key words
acoustics/silencer/transmission loss/non-plane wave/finite element method/element energy superposition分类
数理科学引用本文复制引用
王世华,季振林..消声器传递损失计算的单元能量叠加法[J].噪声与振动控制,2017,37(5):189-192,4.基金项目
国家"863"高技术研究发展计划资助项目(2014AA041502) （2014AA041502）
