平面波理论在实用型直通消音器分析之应用-NationalTaiwan.PDF

國立臺灣大學「台大工程」學刊 第八十六期 民國九十一年十月 第 33–41 頁 33 Bulletin of the College of Engineering, N.T.U., No . 86, October 2002, pp. 33–41 平面波理論在實用型直通消音器分析之應用 THE APPLICATION OF PLANE WAVE * † PROPAGATION THEORY IN ANALYSIS OF 王昭 男 黃 丕 佑 Chao-Nan Wang Pi-Yu Huang STRAIGHT-THROUGH MUFFLERS *教授 †噪音工程師 國立台灣大學工程科學及海洋工程系 英業達股份有限公司 *Professor †Noise Control Engineer Department of Engineering Science and Ocean Engineering, National Taiwan University, Taipei, Taiwan 10617, R.O.C. Inventec Corporation, Taoyuan, Taiwan 335, R.O.C. Abstract In this study the transfer matrices for straight pipe, expansion pipe, extended pipe and perforated extended pipe component are established by using the plane wave propagation theory . Through the concept of stagnation 本文主要是以平面波理論，建立 直管 、膨脹管 、延伸 pressure, the boundary conditions are complete for the open 管、槽孔型延伸管等基本消音元件之傳輸矩陣，透過將停 ended extended perforated tube, the transfer matrix for 滯壓力之觀念導入，因此槽孔延伸管型基本元件之傳輸矩 perforated extended pipe component can be obtained. 陣得以分析，而後將此理論應用在實際直通式消音器之分 And then the theory of the transfer matrix is used to 析上 ，並以實驗驗證理論分析之結果 ，除在大於 2500Hz 以 anal