頁籤選單縮合
題 名 | Shape Optimization of One-Chamber Mufflers with Reverse-Flow Ducts Using a Genetic Algorithm |
---|---|
作 者 | Chiu, Min-chie; | 書刊名 | Journal of Marine Science and Technology |
卷 期 | 18:1 2010.02[民99.02] |
頁 次 | 頁12-23 |
分類號 | 334.5 |
關鍵詞 | Reverse-flow; Decoupled numerical method; Space constraints; Genetic algorithm; |
語 文 | 英文(English) |
英文摘要 | optimization on mufflers within a limited space is essential for industry where the equipment layout is occasionally tight and the available space for a muffler is limited for maintenance and operation purposes. To proficiently enhance the acoustical performance within a constrained space, the selection of an appropriate acoustical mechanism and optimizer becomes crucial. A one-chamber muffler hybridized with reverse-flow ducts which can visibly increase the acoustical performance is rarely addressed; therefore, the main purpose of this paper is to numerically analyze and maximize the acoustical performance of this muffler within a limited space. In this paper, the four-pole system matrix for evaluating the acoustic performance ― sound transmission loss (STL) ― is derived by using a decoupled numerical method. Moreover, a genetic algorithm (GA), a robust scheme used to search for the global optimum by imitating the genetic evolutionary process, has been used during the optimization process. Before dealing with a broadband noise, the STL’s maximization with respect to a one-tone noise is introduced for a reliability check on the GA method. Moreover, the accuracy check of the mathematical model is performed. The optimal result in eliminating broadband noise reveals that the one-chamber muffler with reverse-flow perforated ducts is excellent for noise reduction. Consequently, the approach used for the optimal design of the noise elimination proposed in this study is easy and effective. |
本系統中英文摘要資訊取自各篇刊載內容。