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研究生:陳家誠
論文名稱:掃瞄機結構的模態量測及振動抑制研究
論文名稱(外文):Vibration Measurement and Suppression for Scanner Structure
指導教授:鄭泗滄鄭泗滄引用關係
指導教授(外文):S. T. Jenq
學位類別:碩士
校院名稱:國立成功大學
系所名稱:航空太空工程學系
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:1999
畢業學年度:87
語文別:中文
論文頁數:81
中文關鍵詞:掃瞄機模態量測振動抑制
外文關鍵詞:ScannerVibration MeasurementSuppression
相關次數:
  • 被引用被引用:3
  • 點閱點閱:116
  • 評分評分:
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
本文內容旨在研究掃瞄器作掃瞄動作時,因為結構振動所衍生而成的噪音問題,並且利用吸振橡膠墊片的加入來降低振動噪音的音量大小。我們先利用六個不同結構條件的掃瞄器測試模型,分別對結構振動及掃瞄器內部空氣振動來做模態分析實驗,藉以判斷出振動噪音的生成原因。緊接著評估吸振橡膠墊片加入後對於掃瞄器的結構振動以及噪音的抑制效果。最後再利用結構動態修正(Structural Dynamics Modification, SDM)法,來預測出加上不同材料性質的吸振橡膠墊片時所可能產生對於結構振動方面的影響。
The subject of this thesis is to study the noise stimulated by the structure when the scanner is under operation,and adopting rubber cushion to eliminate the amount of noise. We use six models with different structural conditions to test,and do the experiments to analysis the vibrations resulted from the structure and the air in the scanner respectively,in order to find the source of noise from vibration. We use Structural Dynamics Modification (SDM) to predict the influence of structure vibration by adding rubber with different materials.
第一章 緒言..............................................1
1.1前言...........................................1
1.2研究動機.......................................1
1.3研究方法.......................................2
1.4噪音之定義與相關名詞解釋.......................3
1.5自然頻率與振動傳遞性...........................4
第二章 掃瞄器振動噪音的產生原因.........................10
2.1實驗設備、裝置、設定與步驟......................10
2.1.1實驗設備................................12
2.1.2實驗裝置................................13
2.1.3實驗設定................................14
2.1.4實驗步驟................................15
2.2實驗結果與討論................................18
2.2.1各個結構頻譜之比較......................19
2.2.2各個音壓頻譜之比較......................22
2.2.3 同一模型之結構與音壓頻譜之比較..........25
2.2.4 空氣共振頻率的比較(理論值與實驗值) ......28
第三章 橡膠墊片材料性質的量測...........................55
第四章 加上吸振墊片後對試件振動情形之影響...............58
4.1未加吸振墊片時之振動情形......................57
4.1.1實驗設備................................59
4.1.2實驗裝置與設定..........................59
4.1.3實驗步驟................................60
4.2加上吸振墊片後之振動情形......................62
4.3利用SDM觀念所模擬出之振動情形.................63
4.4加上吸振墊片後對振動情形的改善評估............63
4.4.1實驗設備................................64
4.4.2實驗裝置與設定..........................64
4.4.3實驗步驟................................65
4.4.4量測結果與討論..........................66
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