臺灣博碩士論文加值系統

本文是利用統計能量法之理論，並利用功率輸入法（PIM）測定L 型鋼板及FRP L型複合材料板件結構之內損失因子與耦合損失因子之參數，並經由實驗與理論比較得知SEA之準確度。利用PIM之方式實際量測車輛主要板件結構內損失因子與耦合損失因子之參數，應用於車輛在不同轉速及不同駕駛運轉情況下（靜態、動態）振動噪音試驗，且透過AutoSEA模擬軟體之模擬與實驗值相互比較，實驗的結果與模擬結果吻合度很高。
應用統計能量法來預估車輛結構振動噪音傳遞，對於生產完成之車輛振動噪音之測試，不但可以節省試驗時間，並且提高產業之競爭力。

In this report, we use "Statistical Energy Analysis Theory (SEA)" and the application of "Power Injection Method (PIM)" to measure the Internal Loss Factor and Coupling Loss Factor for both steel and FRP composite material of L plank structure. The comparison between experiments and predictions show that the accuracy of SEA, and then we use the PIM to measure the both factors of car in the situation of different rotational rate and driving conditions. Then we get another experiment about vibration of car structure and noise transmission to fit the simulation results of AutoSEA.

第一章 緒論
1.1前言…………………………………………………………………1
1.2車輛振動與噪音的發生與相互關係………………………………1
1.3研究動機與目的 ……………………………………………………5
1.4研究方法……………………………………………………………7
1.5各章節介紹…………………………………………………………7
1.6本文架構……………………………………………………………9
第二章 統計能量法應用介紹
2.1簡介…………………………………………………………………10
2.2結構體波動現象……………………………………………………12
2.2.1平面波………………………………………………………12
2.2.2彎曲波………………………………………………………13
2.3理論基礎……………………………………………………………16
2.4 內部損失因子(internal loss factor)…………………………20
2.5耦合損失因子(Coupling Loss Factor)…………………………22
2.6模態密度……………………………………………………………23
2.7 AutoSEA軟體簡介…………………………………………………27
第三章 內損失因子及耦合損失因子之測定
3.1 L型板驗證………………………………………………29
3.1.1 實驗目的…………………………………………30
3.1.2 實驗儀器…………………………………………31
3.1.3 實驗步驟…………………………………………31
3.1.4 實驗結果…………………………………………36
3.2 FRP L型板試驗…………………………………………47
3.2.1 實驗目的…………………………………………47
3.2.2試驗材料…………………………………………47
3.2.3實驗儀器…………………………………………50
3.2.4實驗結果…………………………………………50
第四章 汽車靜、動態振動噪音傳遞之預估模擬試驗
4.1 車體靜態振動噪音試驗………………………………85
4.1.1 實驗目的………………………………………86
4.1.2 實驗儀器………………………………………86
4.1.3 實驗步驟………………………………………87
4.1.4 實驗結果與討論………………………………98
4.2 車體動態振動噪音實驗………………………………121
4.2.1 實驗目的………………………………………121
4.2.2 實驗儀器………………………………………121
4.2.3 實驗步驟………………………………………122
4.2.4 實驗結果與討論………………………………130
第五章 結論與未來發展
5.1 結論……………………………………………………149
5.2本研究之困難與問題 …………………………………149
5.3 參考文獻………………………………………………151
5.4 附錄……………………………………………………157

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