開放式槽孔管消音器分析與最佳化設計

Analysis and Optimum Design of Open-End Perforated Element Mufflers

劉王傳(Wang-Chuan Liu)

指導教授 ： 張英俊

大同大學/工程學院/機械工程學系所/碩士(2009年)

摘要

本篇論文主要探討槽孔延伸管之消音性能，利用平面波理論，推導其傳輸矩陣，根據早期文獻無法給定滿足之邊界條件進而無法導出理論之方程式，到近期因將停滯壓力（stagnation pressure）之觀念導入，進而將入口端之傳輸矩陣成功分析，對於出口端之傳輸矩陣本文亦可用同方式加以分析。
而後將對各元件與文獻驗證求其正確性，已證實本文所採用之各個元件使用的傳輸矩陣理論無誤。進而將各個元件組合為本文主要研究之消音器：邊進邊出槽孔延伸型消音器，並對消音器做性能分析。結合遺傳演算法（Genetic algorithm, GA）之最佳化方法，對各個消音器尺寸做最佳化，使其達到最佳消音性能。
最後結果顯示，每個消音器經過尺寸最佳化之後，其針對目標頻率的消音性能均有大幅提升，其中又以邊進邊出槽孔延伸型消音器提升性能最多。

關鍵字

遺傳演算法 ； 槽孔延伸管 ； 最佳化設計 ； 消音器

並列摘要

In this study, the transfer matrix of perforated extended mufflers efficiency to muffle on plane wave theory. According to the early literatures, it can not derived the equation because of those literatures can’t satisfy the boundary conditions. Recently, because of consideration with stagnation pressure idea, it can analysis the transfer matrix at the inlet of muffler and muffler’s outlet of transfer matrix.
Therefore, in this study, the comparisons between four parts of perforated extended of side inlet/outlet mufflers transmission loss and result of literature, it shows that the theorem of transfer matrix is correct. The combination of genetic algorithm (GA) is applied to the optimal design of mufflers.
The mufflers use optimal design method to enhance particular frequency of transmission loss, and the perforated extended of side inlet/outlet mufflers shows the best transmission loss in this study.

並列關鍵字

genetic algorithm ； perforated extended ； Optimal design ； mufflers

參考文獻

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