SA Optimization on Space-constrained Two-chamber Mufflers with Perforated Intruding Tubes

模擬退火最佳化應用於侷限空間下的雙腔突出沖孔管消音器之設計

張英俊 ； 邱銘杰

《中華民國音響學刊》 14期 (2010/07) Pp. 1-31

https://doi.org/10.30049/JASRC.201007.0001

摘要

未來之現代化工廠所需求是體積小且高效能的消音器，為了提高消音器的性能，因此提出一種配置突出沖孔管的消音器設計，本文中，不僅解析內置開放底端之突出沖孔管的雙腔消音器之聲音傳遞損失值，亦進行在侷限空間下的消音器外形最佳化。本文以數值非耦和技術結合模擬退火法以解決孔管的耦和音場問題，並以寬頻鼓風機之噪音改善為範例，在處理多重頻率噪音之前，將以實驗值檢視消音器數學模式之精確性，研究結果顯示，最佳化後的最大解析之聲音傳遞損失值確實能精準的座落於規畫的單頻音上，此外，此內置突出沖孔管的消音器的減音性能確實優於傳統未配置突出沖孔管的消音器。

關鍵字

開放底端之沖孔管 ； 非耦和數值方法 ； 侷限空間 ； 模擬退火法

並列摘要

It has been noted that the application of high performance, compact mufflers are the future for modern factories. In order to increase the acoustical performance, a muffler equipped with perforated intruding tubes is proposed. Here, we will not only analyze the sound transmission loss (STL) of a two-chamber open-ended perforated muffler but also optimize the best design shape within a space-constrained situation.In this paper, both the numerical decoupling technique and simulated annealing (SA) for solving the coupled acoustical problem of perforated tubes are used. A numerical case in eliminating multiple tones of a blower noise is also introduced. Before dealing with a broadband noise, an accuracy check on the mathematical model is performed using the experimental data. Results reveal that the maximal STL is precisely located at the desired targeted tone. Moreover, the acoustical performance of mufflers conjugated with perforated intruding tubes is superior to the traditional mufflers.

並列關鍵字

open-ended perforated tube ； decoupled numerical method ； space constraints ； simulated annealing