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| Experimental Study of Train Running Safety on Steel Spring Floating Slab Track Used in Inner-city Rapid Rail Transit |
| DING Deyun1, MA Meng2, WANG Wenbin3, YAN Yuzhi1, WU Zongzhen3 |
1. Beijing Jiuzhouyigui Environmental Technology Co. Ltd, Beijing 100071, China;
2. Beijing Jiaotong University, Beijing 100044, China;
3. Urban Rail Transit Centre, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China |
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Abstract Research purposes: To investigate the dynamic behavior of steel spring floating slab track (SSFST) under different train speed, and analyze the train running safety when it is used in inner-city rapid rail transit at 160 km/h, eight steel spring floating slab tracks with a total length of 200 m were installed in a test railway line. In the test section, a train speed increased step by step from 60 km/h to 160 km/h. The track dynamic displacement and wheel/rail forces were tested on five sections, and the train running safety under different speeds was analyzed.
Research conclusions: (1) When the train speed gradually increases to 160 km/h, all the safety indexes of steel spring floating slab track do not increase significantly with speed. (2) The vertical dynamic displacements on each steel spring floating slab track do not exceed 3.0 mm, and they decrease with the increase of train speed. (3) At different train speeds, the derailment coefficient is less than 0.3, the rate of wheel load reduction is less than 0.4, and the wheelset lateral force is less than 20 kN. There is safety redundancy for all the above aspects. (4) The present research can provide experimental support for the design and implementation of high-level vibration reduction measures for inner-city rapid rail transit.
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Received: 22 December 2021
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2023, Vol. 40 
