Page 165 - 中華技術127期

摘要 摘要
本文首先針對捷運系統之振動與噪音的成因，清楚分項歸納其對環境之影響與相關防制對策，說明 軌道減振在整體捷運系統之減振降噪之角色與功能。其次，考量結構的振動與噪音特性以及周遭環境影 響之評估，依照沿線評估需求提出適用之軌道減振等級、軌道系統及其他可搭配之方法。再次，進一步 敘明減振軌道之種類，包含高隔振無道碴道床軌道、離散式隔離道床軌道及軌腹阻尼器等，並說明浮動 式道床軌道(Floating Slab Track)對於降低地傳振動與地傳噪音的防制功能，針對不同程度問題減振設施 及選擇浮動式道床軌道的考量。最後說明浮動道床軌道選用與設計條件、設計程序及軌道結構動態分析 程序以及道版之細設強度分析等工作。
1234
Atbtsetnraucat tions of noise and vibration for MRT track system and design of Floating Slab Track
In this article the causes of noise and vibration of MRT system were clearly summarized in itemization for their environment impact and the related control measures first of all. And the role and functions of attenuation of noise and vibration for the track on the total MRT system was clarified. From the consideration of the characteristics of vibration and noise of track structures and their environment impact, the vibration control levels, and suitable track system and other matchable methods were proposed. Further, the types of vibration attenuated track, including NBHI, FST and rail web damper were described. The function of FST to reduce the ground borne vibration and ground noise were explained and the selection of FST type for different vibration control level was considered. Finally, the selection, design conditions and design process for FST were explained, the process of dynamic analysis of “Train-rail-track-structure” coupling system was also discussed.
3
Abstract
No.127│July, 2020│ 163
專題報導