本論文利用實驗模態分析技術，在台鐵正線三座高架彈性基鈑軌道，一座高架PC枕直結式軌道做現地量測。現地量測可分四大部分：(1)以衝擊槌試驗取得彈性基鈑軌道頻率響應函數(FRF)，了解其系統頻率內涵。(2)在量測不同車種車速下軌道響應與插入損失曲線，應用衝擊槌試驗量測結果解讀出列車外力。(3)量測軌道在車行餘動下之響應，觀察其自然振動下有無對應衝擊槌之結果，最後將衝擊槌試驗和車行振動量測結果歸納彈性基鈑軌道振動特性。(4)去台中高架段量測PC枕直結式軌道在不同車速車種下的插入損失，當作比較值來比較彈性基鈑的減振效與優缺點。
　　最後在成大結構材料實驗室施作彈性基鈑材料參數，將獲得之勁度係數與阻尼係數匯入SIMPACK建立集總質量模型，觀察理論是否能解釋現地量測結果，交叉佐證。最後整理出台鐵列車外力與彈性基鈑軌道之頻率表，對照出彈性基鈑皆能有效降低車行主要外力。但有50Hz~63Hz的低頻振動模態與橋面版有關，消散時間較長，是彈性基鈑軌道無法減振的頻段，所以未來需針對此橋樑模態再次驗證，以及找出改善辦法。

Rail vibration was measured on railway of Taiwan Railway Administration to reveal the characteristics of direct-fixation track with flexible fasteners. The filed experiments are separated into four parts. Firstly, hammer test was first conducted to catch the natural frequency of direct fixation railway and frequency response function of the system. Secondly, train-induced vibrations were then measured to obtain the insertion loss of direct fixation track and the frequency spectrum of track dynamic response. Thirdly, the post-vibration on the track was also collected and investigated to reveal effectiveness of fastener on vibration reduction. The results in this part will be compared to the results of hammer test to validate the natural frequencies of direct fixation track. In that end, comparing two types of direct fixation track which are the target track and direct fixation track with PC sleeper in Taichung Line can obtain the effectiveness of vibration reduction
and disadvantage of the target track in this research.
Moreover, the results of field measurements were validated with the analysis of spring-mass model built with SIMPACK. It was concluded that 100 Hz and 630 Hz are the major two frequencies of the track system and it was found that it is effective in vibration reduction induced by trains. However, 50 Hz vibration was observed in this research and it won’t be attenuated by the track. It should be investigated deeply to observe if it damage
the track or bridge in the future.

[1] Thompson, D. J. (1993). Wheel-rail noise generation, Part I: introduction and
interaction model, Journal of Sound and Vibration, 161(3), 387-400.,1993
[2] Thompson, D. J. (1993). Wheel-rail noise generation, Part II: wheel vibration.,Journal of Sound and Vibration, 161(3), 401-419. ,193
[3] Thompson, D. J. (1993). Wheel-rail noise generation, Part III: rail vibration,Journal of
Sound and Vibration, 161(3), 421-446. ,1993
[4] Thompson, D. J. , Wheel-rail noise generation, Part IV: contact zone and
Results, Journal of Sound and Vibration, 161(3), 447-466.,1993
[5] Thompson, D. J., Wheel-rail noise generation, Part V: inclusion of wheel rotation.
Journal of Sound and Vibration, 161(3), 467-482.,1993
[6]黃晟豪、郭振銘、涂兆躒, 軌道扣件勁度對軌道振動之影響, 電子計算機於土木水 利工程應用研討會,國立成功大學,2005
[7] Kuo, C. M., Huang, C. H., & Chen Y. Y., Vibration characteristics of floating slab track. Journal of Sound and Vibration, 317, 1017-1034.,2008
[8] Wu T.X., Thompson D.J., The effects on railway rolling noise of wave reflections in the rail and support stiffening due to the presence of multiple wheels. Appl Acoust
2001;62:1249–66.
[9] Thompson D.J., Jones C.J.C., Noise and vibration from railway vehicles. In: IwnickiS, editor. Handbook of railway vehicle dynamics. CRC Press, Taylor & Francis. p. 279－
325, 2006
[10] Johansson A, Nielsen JCO, Bolmsvik R, Karlström A. Under sleeper pads –
influence on dynamic train-track interaction. Wear 265:1479–687,2008
[11] Xiaozhen Li,Dewang Yang, Guiyuan Chen, Yadong Li,Xun Zhang,Review of recent progress in studies on noise emanating from rail transit bridges. J.Mod Transport,2016
[12] MiguelSol-Sanchez,Fernando Morewno-Navaro,MaCarmenRubio .The use of elastic elements in railway tracks A state of the art review.Construction and Building Materials.,2015
[13]歐迪穎,軌道振動與噪音量測試驗,國立成功大學,土木工程研究所,碩士,2011
[14]吳文豪,鋼軌波狀磨耗之成因探討-以台鐵沙崙線為例, 國立成功大學,土木工程 研究所,碩士,2017
[15] MRT-Production,Modern Railway Track Second Edition.2001
[16]徐偉恩,軌道系統減振模式之建立與分析,國立海洋大學,系統工程暨造船學系研究所,碩士,2006
[17]林昱呈,直接固定式與浮動式道床於減振效果之比較研究,台北科技大學,機電整合研究所,碩士,2015
[18]練松良,劉衛星軌道墊層振動特性試驗研究,城市軌道交通研究4卷4期,P9-14,2001