• 作者： 王偉輝
• 作者服務機構： 海洋大學造船系造船工程學系
• 中文摘要： 本文探討船舶機艙內之噪音源，如主機、發電機、減速機及排煙管等，於運作時其內之振動能量，如何藉由多管道(Multi-Path)傳遞至結構體之動性(Mobility)或量測，而算出傳遞至結構域振動能量流。對於量測儀器表現之校準方法作了詳盡的討論，以期於高速艇量測所得數據可信。對量測所得結果為證實可信，文中尚提出幾項頗具價值的核驗方法“證實平行量測技術(PMT)應用在實船動性之量測為可行，因此提供一種簡化的近似動性量測法。對於國內承建之高速艇實測結果知，主機垂向的振動能量傳遞為最大。該艇全速航行時，發現機艙內之機座，有些是將機械振動之能量傳遞至船底結構中；亦有一些機座是將船底結構之振動能量傳至運轉之機器內，船底之驅動振動能量是由軸系振動及螺樂轉動時於其四週流場之擾動水壓所造成。
• 英文摘要： The vibratory power of structure-borne noise sources in a vessel generated by a main diesel engine,generator, reduction gear and exhaust pipe, all of which are located in the engine room and are fittedto the ship structure, have been investigated in this study. Calculation of the structure-borne vibratorypower flow transmitted through the multi-paths between the above mentioned operating machinery andthe connected structures has been determined by utilizing the measurement data of the mobilities and bycharacterizing the noise sources as velocity sources. To ensure that the data measurements collected onboarda fast patrol boat were correct, details of the instrument calibration are given. Also, valuable data checkingmethods are submitted and utilized in this work. The parallel measurement technique is validated andfound to be applicable to transfer mobility measurement of the elastic mountings．Experimental data resultsand calculations of the transmitted vibrational power flow show that the vertically transmitted power fromthe main engine to the seating structure is the most dominant structure-borne noise source in the engineroom．
• 中文關鍵字： point/transfer mobility; impedance; noise source; structure-borne
• 英文關鍵字： --