現今台北捷運之新莊-蘆洲線，路線規劃穿越學校、住宅等振動敏感區域。為解決地下段振動問題，台北捷運將首次自國外引進浮式道床軌道。本研究依軌道動力學理論，建立浮式道床軌道動態平衡方程組，並以數值法四階Runge-Kutta method進行軌道歷時反應之求解，探討浮式道床軌道之動態反應以及軌道參數之定性分析。
　　研究結果發現，浮式道床軌道變位隨車速提高增幅較大，且於某些列車行駛速度下會產生輪軌共振現象，使軌道反應異常放大，顯示浮式道床軌道不利列車高速運行。軌道版質量之增加及其下支承墊勁度之降低，均對軌道變位產生更大幅度之增加，且加大道版質量將降低輪軌共振產生速度，並產生較大之輪軌接觸力。

　　Taipei M.R.T.S Xinzhuang-Luzhou line plans to pass through vibration sensitive areas. To solve vibration problem in tunnels, the Taipei M.R.T.S will use floating slab track first time in Taiwan. The floating slab track dynamic equilibrium equations are established in this research, to obtain responses of the track model by 4th Runge-Kutta method.
　　From the result, we found that the floating slab track displacements increase significantly at higher vehicle speed. Also, wheel/track resonance effect was found under certain train velocities. It shows that the floating slab track is disadvantageous in high speed range. Increase the slab mass and decrease the supporting pad stiffness will cause higher track displacement. In addition, increasing slab mass is effective in reducing the resonant speed, and enlarge the wheel/track contact force.

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