- 學位論文
模組化増程式發電機隔聲罩設計
Acoustic Enclosure Design of Modular Range-Extended Generator
摘要
本研究中以華擎機械開發的車用發電機組（Genset）為研究對象，為了設計一局部隔聲罩以解決它的噪音問題，以振動噪音軟體LMS virtual. lab模擬隔音、並以田口法(Taguchi Method)分析局部隔聲罩之幾何參數對降噪能力之影響。然而，隔聲罩無法避免的就是伴隨而來的罩內散熱問題，故本研究與另一篇研究合作，以田口法探討幾何參數分別對降噪、散熱的影響，並提出兼顧兩者之方向。研究結果顯示，單純考慮隔音效果的情況下，影響最大的因子為前後開口大小與隔音擋板數量；在同時兼顧降噪與散熱能力的情況下，改善散熱可從前後開口著手，降低噪音則只能改變前後擋板間距等因子。利用田口法分析結果提出之優化方向，可有效在兼顧散熱的情況下降低噪音。
並列摘要
This research designs an Acoustic Enclosure to reduce the noise of an Modular Range-Extended Generator (Genset) from CEC. This research uses noise and vibration software “LMS virtual. Lab” to predict the sound pressure reduced by the acoustic enclosure, and uses Taguchi Method to analysis the influence to noise reduction by the geometry factors of the acoustic enclosure. However, the heat dissipation problem must come with the sealed design. Therefore, this research cooperates with another research to analysis the influence to both noise reduction and heat dissipation by the geometry factors of the acoustic enclosure, and provides a direction to handle them. The results indicate that the most important factors affecting enclosure performance without considering heat dissipation are the opening size of front and rear, and the number of barriers at the air inlet. When considering both noise reduction and heat dissipation, the effect of the space between barriers to noise reduction is more prominent, while the opening size causes more influence to heat dissipation. After optimizing with the result of Taguchi Method analysis, the noise of the Genset can be reduced with good heat dissipation.