摘要 本文使用消音器來改善40HP魯式鼓風機噪音相關問題,探討消音器的消音性能及消音器內部結構的設計。針對高頻噪音使用吸音材料進行消音;低頻噪音則透過改變結構設計進行消音。經過改良設計後,噪音源從116dBA有效降至76.5dBA。 使用模擬軟體COMSOL建立消音器模型,能有效降低成本與實驗時間,經過分析得知不同形式消音器之性能,並可將資料統計分析進行最佳化設計。 使用統計軟體SPSS對資料進行ANOVA變異數分析,可得對消音器性能影響較大的設計參數,供日後設計消音器時參考,並利用田口法分析得知S/N比及S/N比反應圖表,從S/N比反應圖表中得知最佳化設計之消音器。 關鍵字: 消音器 降低噪音 最佳化設計 變異數分析 田口法
ABSTRACT Using the muffler to improve the noise problem of 40HP Root blower. Exploring the performance of muffler and design of the muffler internal structure. Use the material of sound-absorbing to reduce the high frequency noise; change the structure design to reduce the low frequency noise. After improved the design of muffler, the noise sources reduced to 76.5 dBA from 116 dBA. Building the model of muffler by software COMSOL, that can reduce the cost and time of experiment. Obtaining the performance of the different forms of muffler, and statistical analysis to optimize the design. The data use the analysis of variance (ANOVA) by software SPSS, that can obtain the larger impact design parameters for the performance of muffler. It can be the reference of design muffler in the future. Obtaining the S/N ratio and S/N ratio response chart. Finding out the optimized design of muffler from S/N ratio response chart. Keywords: Muffler、Silencer Noice Reduction Optimized Design Analysis of Variance Taguchi Methods