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| Theoretical analysis of long floating slab track |
| Received:October 08, 2007 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20096026 |
| KeyWord:Long floating slab track (LFST) isolation of vibration dispersion graph critical velocity |
| Author | Institution |
| 刘学文 |
上海工程技术大学基础教学学院,上海 |
| 吴川 |
上海交通大学 船舶与海洋建筑工程学院,上海 |
| 谢军 |
南昌大学 电子信息工程系,南昌 |
| 黄醒春 |
上海交通大学 船舶与海洋建筑工程学院,上海 |
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| Abstract: |
| Floating slab track (FST) is the best structure form for isolating vibration caused by moving train,in this paper, the system was considered as an opaque box which was used to isolate vibration induced by passing vehicles, in which two Euler-Bernoulli beams were used to model rail and slab respectively. And then the vibration equations were derived and transformed to wave-frequency domain by Fourier transform, and the dispersion equation and critical velocity were obtained. Three new parameters relating to the box named mass ratio ξm, stiffness ratio ξk and damping ratio ξc were defined. With the given parameters of rail, effect of these parameters on the dispersion graph and critical velocity were investigated. The results could be used to guide the design of FST, especially for the resonance frequency and critical velocity. |
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