【正文】 ............................................ 35 指標無量綱處理 ......................................................................................................... 37 評價指標體系權重的獲取 .................................................................................................. 39 層次分析法 ................................................................................................................. 39 基于 AHP 的評價指標權重確定 ............................................................................... 43 應用實例 .............................................................................................................................. 45 本章小結 .............................................................................................................................. 484 基于 CBR 的排氣消聲器快速設計方法研究 ................................................... 49 CBR 的核心思想及工作過程............................................................................................. 49 CBR 的核心思想 ........................................................................................................ 49 CBR 應用于排氣消聲器設計的可行性分析 ............................................................ 50 基于 CBR 的排氣消聲器選型設計思路 ................................................................... 51 實例知識的表達與實例庫的建立 ...................................................................................... 53 實例知識的表達 ......................................................................................................... 53 實例知數(shù)據(jù)庫的建立 ................................................................................................. 55 最大相似度實例的檢索方法研究 ...................................................................................... 56 常用的實例檢索與匹配方法 ..................................................................................... 56 實例的初步檢索 ......................................................................................................... 57 排氣消聲器匹配檢索方法 ......................................................................................... 57 相似度匹配中權重的獲取 ......................................................................................... 58 最優(yōu)實例的選定 ......................................................................................................... 60 實例的評價與修改 .............................................................................................................. 62 實例聲學性能的評價與修改 ..................................................................................... 63 實例空氣動力學性能的評價與修改 ......................................................................... 64 實例的保存及維護 .............................................................................................................. 65 本章小結 .............................................................................................................................. 655 排氣消聲器快速設計系統(tǒng)開發(fā)與應用 ................................................................. 67 系統(tǒng)的開發(fā) .......................................................................................................................... 67 實例應用及程序操作 .......................................................................................................... 68 設計目標 ..................................................................................................................... 68 選型設計 ..................................................................................................................... 69 選型結果實驗驗證 ..................................................................................................... 73 實例評價與修改 ......................................................................................................... 74 數(shù)據(jù)庫管理模塊 ......................................................................................................... 75VII 權重管理模塊 ............................................................................................................. 75 本章小結 .............................................................................................................................. 766 總結與展望............................................................................................................................77 論文總結 .............................................................................................................................. 77 后續(xù)研究展望 ...................................................................................................................... 78致 謝.......................................................................................................................................79參考文獻.......................................................................................................................................81附 錄.......................................................................................................................................87A 作者在攻讀碩士期間發(fā)表的論文............................................................................................ 87B 作者在攻讀碩士學位期間取得的科研成果............................................................................ 871Equation Section (Next)1 緒論 課題研究背景和意義進入 21 世紀以來，隨著全球經(jīng)濟的高速發(fā)展，交通運輸業(yè)得以迅猛發(fā)展，但汽車所帶來的噪聲問題也日趨嚴重。對排氣消聲器的各項性能要求所涉及的評價指標進行了詳細闡述，從排氣消聲器的傳遞損失自身性能、匹配性能、插入損失性能和壓力損失性能幾個方面對排氣消聲器的性能定量化評價方法進行了詳細的分析，建立了一種可量化的排氣消聲器綜合性能評價體系。關鍵詞：排氣消聲器，綜合評價，實例推理，快速設計IIIABSTRACTAutomobile exhaust muffler is the multidisciplinary bination withindispensible evaluation indexes. Based on expert knowledge, a prehensiveperformance evaluation system of exhaust muffler has been established, theprehensive quantitative evaluation of multiindex of exhaust muffler has beenimplemented, and the doubtfulness of paring the cases respectively according todifferent indexes has been avoided. Exhaust muffler design is a typical design processwith experience overweighs theory。在如今市場經(jīng)濟和企業(yè)信息化高速發(fā)展的時代，企業(yè)必須擁有敏銳的市場洞察能力，能在最短的開發(fā)時間內(nèi)，開發(fā)出成本最低、質量最好的產(chǎn)品，才能在日益激烈的市場競爭中處于不敗之地。這種排氣消聲器設計和評價方法即浪費了人力