臺灣博碩士論文加值系統

本文主要探討雙層板之隔音性能，然而在實際製作雙層板以及實驗量測中，兩個面板間需要利用支架來互相連接。本文利用統御方程式，首先列出雙層板之振動方程式，而對於中間支架結構部分視為彈簧來計算，其中需特別注意彈簧之剛性值，根據文獻可以發現，隨著入射頻率之不同，相對彈簧剛性的大小也不相同，因此以文獻所提出的彈簧剛性值之分布作為依據，選擇出剛性值與頻率的關係曲線，代入理論計算來模擬支架式雙層板之隔音性能。
為了驗證本文之理論，將以往學界所發表的文獻模擬和以及實驗數據之隔音曲線，與本文理論計算互相比對後，結果大致符合，可證明本文理論之可行性。接著以此理論針對支架式雙層板的隔音量探討，藉由改變參數，如面板的厚度、密度，或是支架的厚度和間距以及加入多孔材料等，探討各參數的變化對於隔音性能的影響。分析後發現，板材厚度的變化會改變吻合效應所發生的頻率，進而影響整體之隔音性能。最後由理論分析可知支架式雙層板加入多孔材料後，可將隔音量提升5 dB左右。

The purpose of this research is to discuss the sound insulation of double-leaf panel. In the actual production of panels and experimental measurements, the middle part of the double-leaf panel needs to be connected by studs. Then the way of connection divided of points and line. The sound insulation quantity of different connection methods is not the same. In this thesis, we use the governing equation to simulate the sound insulation performance of double-leaf panel, while the middle structure is simulated by springs. With the difference of the incident frequency, the stiffness of the spring is also different. Based on the literature proposed to distribution of spring stiffness values, into the theoretical calculation to simulate the sound insulation performance of double-leaf panel.
To order to verify the present method, citing data measured by NRCC. The comparison of the transmission loss between experimental data and numerical predictions is reliable. Using the present method, several cases are set up to investigate related parameters of double-leaf panel, such as thickness, density, stud spacing, distance between two panels and add some porous between two panels. The numerical results show that the coincident frequency will change with different thickness of the panel. Finally, theoretical analysis show that add porous to the structure can increase the sound insulation by about 5 dB.

致謝 I
摘要 II
Abstract III
目錄 IV
圖目錄 VI
表目錄 VIII
第一章 緒論 1
1.1 研究動機與目的 1
1.2 文獻回顧 2
1.3 論文架構 4
第二章 理論分析 5
2.1統御方程式 5
2.1.1狀態方程式 5
2.1.2連續方程式 5
2.1.3尤拉方程式 5
2.1.4波動方程式 6
2.1.5彎曲波方程式 6
2.2質量法則 8
2.3單層板之隔音分析 10
2.4雙層板之隔音分析 14
2.4.1方程式建立 14
2.4.2支架式雙層板介質皆為空氣之隔音計算 16
2.4.3支架式雙層板中間層為多孔材料之隔音計算 18
2.4.4無支架雙層板隔音量計算 21
第三章 隔音效果之驗證 23
3.1單層板之隔音效果驗證 23
3.2無支架雙層板之隔音效果驗證 25
3.3有支架雙層板 29
3.3.1彈簧剛性之計算 30
3.3.2分析結果與文獻數據比較 34
3.3.3實驗比對 38
3.4小節 44
第四章 影響隔音性能參數之探討 45
4.1面板參數改變對隔音性能之影響 45
4.1.1面板厚度 45
4.1.2面板材質 46
4.2中間層對於隔音性能之影響 47
4.2.1有無立柱之隔音性能比較 48
4.2.2立柱寬度對隔音性能影響 49
4.2.3立柱間距對隔音性能影響 50
4.2.4加入多孔材料對隔音性能影響 51
4.2.5改變多孔材料對隔音性能影響 52
第五章 結論 54
5.1結論 54
5.2未來展望 55
參考文獻 56

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