| 研究生: |
吳依寰 Wu, Yi-Huan |
|---|---|
| 論文名稱: |
摩擦型阻尼器系統之擬動態試驗與振動台驗證 Pseudodynamic Testing and Shaking Table Verification of Friction Damper Systems |
| 指導教授: |
朱世禹
Chu, Shih-Yu |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 土木工程學系 Department of Civil Engineering |
| 論文出版年: | 2011 |
| 畢業學年度: | 99 |
| 語文別: | 中文 |
| 論文頁數: | 160 |
| 中文關鍵詞: | 振動台實驗 、隔震系統 、摩擦型阻尼器 、擬動態實驗 、多重取樣量測技術 |
| 外文關鍵詞: | Shaking Table Test, Isolation System, Friction Damper, Pseudo-Dynamic Test, Multiple Sampling Techniques |
| 相關次數: | 點閱:82 下載:2 |
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振動台實驗為所有結構實驗中最能呈現結構受震波作用下之動態行為,但縮小的結構模型則礙於尺寸效應,無法真實模擬實尺寸結構之耐震行為。因此,以油壓致動器配合實尺寸模型之擬動態實驗為經濟且適當之折衷試驗方法。為探討一般隔減振元件採用擬動態實驗進行性能測試之可行性與正確性,本文設計一單自由度隔震結構裝置摩擦阻尼器元件,首先進行數值模擬分析,以規劃適當之振動台實驗參數,並將此隔震結構進行振動台實驗;其次,將摩擦阻尼器此一非線性元件取出,並將單自由度隔震系統數值模型化,進行多重取樣量測之擬動態實驗;最後將振動台實驗結果與擬動實驗結果進行比較。本文之擬動態實驗結果顯示:(1)多重取樣量測可以使回授之摩擦力訊號較準確,減少擬動態實驗產生之誤差。(2)擬動態實驗為量測實驗試體之反力,再回授至電腦數值模型中以模擬以計算下一步反應。此實測之試體反力,可直接反應數值模型不易模擬之元件特性。(3)擬動態之實驗結果與振動台實驗之結果比較顯示兩者行為趨勢相符,且極值相同。表示透過擬動態實驗確實可取代振動台實驗。
In order to investigate the feasibility and accuracy of the vibration control performance of friction dampers tested by the pseudodynamic test, a single-degree-of- freedom isolation system equipped with a friction damper is designed and simulated in this study. Firstly, the isolated system is tested by the shaking table test. Secondly, the friction damper is adopted by the proposed pseudodynamic test using the multiple sampling techniques while the main structure is simulated as a numerical model in the control computer. Finally, we compare the results of pseudodynamic test and shaking table test. The results of pseudodynamic test have demonstrated that multiple sampling techniques can improve the accuracy of friction force signal to reduce error caused by step-by-step integration method in pseudodynamic test. Besides, the friction force of specimen is measured and fed back to the numerical model to compute the displacement of the next step. It can represent the real behavior of friction damper while the corresponding mathematical model is unknown or complicated to identify. Finally, the results of pseudodynamic test and shaking table test are similar and the peak values of structural responses are the same. It means that pseudodynamic test can illustrate the vibration control performance of friction dampers appropriately.
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