| 研究生: |
何婉珊 Ho, Yuen-Shan |
|---|---|
| 論文名稱: |
橋梁沉陷對磁浮列車行車安全性之探討 Safety Study of Maglev Trains Moving On Bridges During Foundation Settlements |
| 指導教授: |
朱聖浩
Ju, Shen-Haw |
| 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: | 英文 |
| 論文頁數: | 115 |
| 中文關鍵詞: | 磁浮列車 、PI控制 、軌道不整度 、基礎沈陷 、Newmark法 、Timoshenko 梁 |
| 外文關鍵詞: | maglev train, PI control, rail irregularity, foundation settlement, Newmark method, Timoshenko beam |
| 相關次數: | 點閱:125 下載:10 |
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本論文之主要目的為探討磁浮列車在基礎發生沈陷時之行車安全性問題。不同於過去的輪軌系統,磁浮系統是利用電與磁之原理,產生磁浮力使列車懸浮在軌道上行走。由於並無機械性接觸,故其速度可作進一步之提高,取代傳統的輪軌火車而成為新一代之交通運輸工具。本論文將利用有限元素法分析十二節車廂之磁浮列車,以常速走過一簡支多跨橋的動態行為,其中採用PI控制來調整列車之懸浮系統,以維持其穩定性。由於磁浮列車對其與軌道間懸浮高度的變化非常敏感,基礎發生沈陷將可直接影響行車之安全,故必須認真探討之。而從分析結果可發現,軌道不整度的影響是明顯的,然而,容許垂直沉陷量和因軸向扭轉造成的容許側向位移則會因側向電磁力的加大而有顯著的改善。
The main purpose of this thesis is to study the safety of maglev (magnetically-levitated) trains moving on bridges while foundation settlements are taken into account. Different from the rail-wheeled system in the past, the maglev system produced the electromagnetic force to levitate the maglev train on bridges by using the theory of electromagnetism. Since there is no mechanical contact between the train and the guideway, the speed can be increased greatly, and also has the ability to take place of the traditional rail-wheeled train, to become a new generation transport system. This thesis investigates the dynamic response of twelve carriages maglev trains moving on multi-span simply supported bridges at constant speed by using the finite element analysis, in which the PI control is applied to adjust the levitation system for the stability. Because the change of the levitation gap between the train and guideway is so sensitive for maglev trains, it can directly affect the safety during the operation. Thus, it has to be considered seriously. From the analyzing result, one can easily find that the influences of rail irregularities are obvious. However, the allowable vertical settlement and the Y-deflection caused by X-rotation can be significantly improved when the lateral electromagnetic force is enlarged.
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