鐵路列車引致之樓版振動與減振分析

On the analysis of floor vibration and vibration mitigation due to train load

李緯瀚(Wei-Han Li)

指導教授 ： 廖文義

國立臺北科技大學/工程學院/土木與防災研究所/碩士(2012年)

https://doi.org/10.6841/NTUT.2012.00064

摘要

為了瞭解台鐵列車行經車站的地下結構時，所引起之振動對於上部結構體在振動方面的影響程度。進行鐵路列車行駛下結構物樓版振動現地量測，得知鐵路列車行駛下現有結構物樓版之實際數值，及判斷其是否對居住舒適度造成影響。本研究利用ETABS分析軟體建立結構分析模型進行結構振動分析，以量測現行列車行駛時的加速度歷時為輸入，進行數值模擬與分析。修正分析模型並與量測結果比較，使可準確模擬動態行為。最後利用ETABS分析軟體在結構分析模型加裝調諧質量阻尼器(Tuned Mass Damper簡稱TMD)來達到減振效果。TMD減振原理是將阻尼器之振動頻率設計成與構造物之基本振動頻率相近，當結構物受外力振動時，TMD會應共振原理隨結構振動，而TMD在振動過程中與結構間的互制作用會減小構造物之振幅。

關鍵字

三分之一倍頻法 ； 調諧質量阻尼器

並列摘要

In order to understand that the impact of vibration induced by the train on the upper structure. This main purpose of this study is to measure the vibration induced by the passing train and build model by ETABS. The input data are the acceleration time histories that recorded at the location of measurement. The results of the experiment and numerical analysis will compared with each that make the model be accurated. Finally, the structure modal set with TMDS by ETABS may suppress the vibration of structure. The principle of damping vibration is that tunes TMD into the natural oscillation frequency of structure in order for inner material within TMD to vibrate in an opposite direction to an external force. This process allows vibrational energy to be absorbed by decreasing vibration of structure as a result.

並列關鍵字

One-third octave band ； Tuned Mass Damper

參考文獻

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