不同幾何形狀消音器及其內部吸音材料配置最佳化設計

Various Configurations of Mufflers and the Optimal Layout of Absorption Material

杜建宗(Chien-Chung Tu)

指導教授 ： 張英俊

大同大學/工程學院/機械工程學系所/碩士(2006年)

摘要

本論文整合遺傳演算法(Genetic algorithm, GA)與聲學分析軟體
SYSNOISE使用邊界元素法(Boundary element method, BEM)於消音器最
佳化設計。
論文分三部份：一、花辦形截面積消音器之消音性能：利用花瓣形
曲面來減低噪音，探討不同花瓣數目與吸音管位置，對減低噪音能力的
影響；二、鋸齒狀消音器之消音性能：利用特殊鋸齒形狀來減低噪音，
探討夾角對噪音的影響程度；三、整合SYSNOISE 分析軟體與遺傳演算
法的最佳化設計：使用遺傳演算法來規劃吸音材料分布，來達到消音性
能最佳化。結果顯示:採用遺傳演算法，搜尋吸音材料位置搭配花辦形與
鋸齒形消音器，可以有效地提升傳遞損失(Transmission Loss)。

關鍵字

遺傳演算法，邊界元素法，花瓣形截面積消音器，鋸齒狀消音器

並列摘要

This study combines the genetic algorithm (GA) and the acoustic analysis software SYSNOISE and uses boundary element method (BEM) to perform the muffler optimum design.
The study is composed of 3 parts: (1) the acoustic performance of muffler with four-lobed cross section: using the petaline curved surface to reduce noise and discuss the acoustic performance regarding to the number of petals and the location of absorbent pipe; (2) the acoustic performance of indentation muffler: using special designed indentation to reduce noise and discuss the correlation between indentation angle and the noise level; (3) optimal design combined with SYSNOISE analysis software and genetic algorithm: using GA to layout the distribution of absorptive materials in order to optimized the muffle performance. The results show that using genetic algorithm searches the location of absorptive materials combining with the four-lobed and indentation mufflers can improve the transmission loss effectively.

並列關鍵字

Genetic Algorithm ； Boundary Element Method ； Four-Lobed Muffler ； Indentation Muffler.

參考文獻

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