高速列車行經道岔結構之動態反應分析

Abstract

高速鐵路營運之安全性除了橋樑結構安全之外，軌道結構安全亦為重要課題之一，其中道岔結構為軌道系統變換車道不可缺少的特殊軌道結構，當列車於軌道上行駛，將列車由一股軌道導引駛往另一股軌道，可使列車於軌道系統中順利變換車道的裝置，即為『道岔結構』，道岔結構使鋼軌結構連接成不連續的狀態，當高速列車通過道岔結構時，所引起列車、道岔結構及橋樑之動態反應與道岔結構之整體強度與穩定性有關，道岔結構影響列車的行車穩定與行車安全等問題為軌道結構的重要議題。 本文研究重點在分析台灣高鐵700T型列車通過德國BWG公司之2S型道岔結構，以不同行車速度及含高架橋效應下，列車在入岔和出岔時對於道岔整體結構與橋樑結構之衝擊反應分析。 本文先分析單節車廂引起的道岔段之高架橋、軌道及道岔動態反應，利用線性疊加之方式將單節列車之分析結果，依時間差關係進行疊加，而擴增至十二節列車引起之結構反應，以呈現實際多節列車通過時所造成之動態反應狀況。

For the operation reliability of high speed rails both the safety of bridge structure and the security of track structure are the most important issues. Turnout is indispensable track structure among the structure of the track system, when the train travel, from one to other track, turnout is the device which allows to convert the direction of the train. When the high speed train passes through the turnout structure on viaduct, the dynamic responses of the train, turnout and bridge structure are strongly affected by the overall strength and stability of turnout and the safety and the riding comfort of rolling stock influenced by turnout structure is a key issue of track system. This thesis focus on the dynamic responses of BWG type 2S turnout induced by 700T train of Taiwan High Speed Rail with different speed. The effects of the viaduct on the dynamic response of overall turnout and bridge structures were also investigated. Finally, using the principle of linear superposition the dynamic response of turnout induced by 12 trains was assembled by the results obtained by single train analysis in accordance with time difference of passing trains.