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Track flexibility coefficient （TFC） of the floating slab track （FST） subjected to the moving wheel-rail forces
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Xin-yu TAN1, 2, Wei-feng LIU2, Bo-long JIANG1, Yu ZHANG3, Bai-yan ZHANG3
Journal of Vibration Engineering | 2024, 37(11) : 1898 - 1905
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Journal of Vibration Engineering | 2024, 37(11): 1898-1905
Track flexibility coefficient （TFC） of the floating slab track （FST） subjected to the moving wheel-rail forces
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Xin-yu TAN1, 2, Wei-feng LIU2, Bo-long JIANG1, Yu ZHANG3, Bai-yan ZHANG3
Affiliations
  • 1National Engineering Research Center for Digital Construction and Evaluation Technology of Urban Rail Transit， China Railway Design Corporation，Tianjin 300308，China
  • 2School of Civil Engineering，Beijing Jiaotong University， Beijing 100044，China
  • 3China Railway Construction Southern Construction Investment Corporation， Shenzhen 518000，China
Published: 2024-11-28 doi: 10.16385/j.cnki.issn.1004-4523.2024.11.010
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To establish a 3D metro train-FST coupling model in the frequency domain，the key problem of the rail displacement at each moving wheel-rail contact point caused by all moving wheel-rail forces needs to be solved firstly. The matrix of the TFC establishes the relationship between them. Based on the established 3D discrete supported floating slab track model in the frequency domain，a method to calculate the TFC is put forward in this paper. Based on the relationship between the fixed and moving coordinate systems，the TFC to a moving point on FST can be written as the integration of the rail displacement response at a fixed point in the frequency domain caused by a moving harmonic load. After calculating the TFC of the 3D FST，some conclusions are obtained. At each excitation frequency，the TFC of a moving wheel-rail force to each wheel-rail contact point is the largest at the point of the force itself. Due to the moving of the wheel-rail force，there is a certain difference between the TFC of the front axle wheel-rail force to the rear axle wheel-rail contact point and that of the rear axle wheel-rail force to the rear axle wheel-rail contact point. In the same bogie，the TFC of the left wheel-rail force of the front axle to the right wheel-rail contact point of the same axle is similar to the TFC of that force to the left wheel-rail contact point of the rear axle. It is advisable to use a 3D model to finely analyze the dynamic characteristics of floating slab tracks.

floating slab track  /  track flexibility coefficient  /  3D model in the frequency domain  /  infinite periodic structure theory  /  Kirchhoff’s thin plate theory
Xin-yu TAN, Wei-feng LIU, Bo-long JIANG, Yu ZHANG, Bai-yan ZHANG. Track flexibility coefficient （TFC） of the floating slab track （FST） subjected to the moving wheel-rail forces[J]. Journal of Vibration Engineering, 2024 , 37 (11) : 1898 -1905 . DOI: 10.16385/j.cnki.issn.1004-4523.2024.11.010
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Year 2024 volume 37 Issue 11
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Article Info
doi: 10.16385/j.cnki.issn.1004-4523.2024.11.010
  • Receive Date：2024-01-29
  • Online Date：2026-02-12
  • Published：2024-11-28
Article Data
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  • Received：2024-01-29
  • Revised：2024-03-20
Funding
Affiliations
    1National Engineering Research Center for Digital Construction and Evaluation Technology of Urban Rail Transit， China Railway Design Corporation，Tianjin 300308，China
    2School of Civil Engineering，Beijing Jiaotong University， Beijing 100044，China
    3China Railway Construction Southern Construction Investment Corporation， Shenzhen 518000，China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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Genus		 种数
Number of
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Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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