| 研究生: |
李仁傑 Lee, Zen-jie |
|---|---|
| 論文名稱: |
鈸型結構壓電換能器之聲場模擬分析與實作 The Implementation and Analysis Of Cymbal Transducer |
| 指導教授: |
涂季平
TOO, Gee-Pinn |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 系統及船舶機電工程學系 Department of Systems and Naval Mechatronic Engineering |
| 論文出版年: | 2009 |
| 畢業學年度: | 97 |
| 語文別: | 中文 |
| 論文頁數: | 60 |
| 中文關鍵詞: | 有限元素分析 、鈸型結構壓電換能器 、聲場模擬分析 |
| 外文關鍵詞: | Cymbal transducer, Finite element analysis, Acoustic field response analysis |
| 相關次數: | 點閱:54 下載:8 |
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本論文對壓電陶瓷元件與金屬所製成的鈸型結構壓電換能器進行研究,設計製作水下探測、定位、通訊研究所需的聲源。研究工作分成三個部分,分別是機構設計與系統建模、電腦模擬輻射聲場計算、以及換能器製作與測試。
在理論方面採用有限元素法分析換能器的結構振動,以有限元素軟體模擬進行模態分析與簡諧分析,分別計算出系統自然頻率與結構位移等資訊。最後將解題結果檔資訊匯入聲學計算軟體Virtual Lab Acoustic,採用邊界元素法運用赫姆霍茲積分方程式計算換能器的輻射聲場。
換能器製作選定壓電陶瓷片作為驅動元件,黃銅片作為鈸帽材質,製造鈸型結構換能器,並結合聲場量測系統,測試自製換能器的性能。藉由聲源強度、頻譜圖與指向性分佈圖評估換能器的特性,並與模擬結果做比較,掌握換能器的設計與分析能力。
關鍵字:鈸型結構壓電換能器,有限元素分析,聲場模擬分析。
This thesis investigates a new type of piezoelectric composite transducer ,which called Cymbal transducer. The investigation covers theoretical simulation, fabrication, and experimentation measurement.
The Cymbal transducer was designed with the finite element method(FEM). Using the FEM software to compute the natural frequency and displacement information of Cymbal transducer respectively by ANSYS modal analysis and harmonic analysis. Finally, this study imported the results into the LMS Virtual Lab Acoustic software, which is using boundary element method(BEM) and Helmholtz integral equation to compute the radiation sound field.
The fabrication of transducer selected piezoelectric ceramics as the drive components r, brass as cymbal cap, manufactured the cymbal transducer, and combined the sound field measurement system to test the performance of transducer. Experimental parameters of the test includes the frequency spectrum, sound source intensity, and beam pattern, and compared with the simulation results to grasp transducer design and analysis capabilities.
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