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<p>In steel spring floating slab tracks (FST), low support stiffness causes significant vibration when trains pass, leading to rail corrugation, stability issues, and reduced damping. This paper presents a shear-type vibration suppression device (ST-VSD) that improves FST stability. Comparative analysis shows the ST-VSD outperforms existing dynamic vibration absorbers (DVA). In investigations using a simplified dynamic model, under optimal DVA operating conditions with equivalent damping properties, the amplitude amplification factor of the floating slab with the ST-VSD installed reduced by 42.55 % compared to the DVA setup. In the train passing transient, the amplitude amplification factor decreased by 43.63 % relative to the DVA installation. The ST-VSD achieved vibration suppression of 26 %, 16.3 %, and 22.2 % for the car body, floating slab, and tunnel wall, respectively. Additionally, it reduces support force on steel springs, extending their service life, and its compact design allows for easy installation with minimal disruption to maintenance.</p>

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Shear-type vibration suppression device for enhancing dynamic performance of steel spring floating slab tracks

  • 期刊论文

  • 发表日期：

    2025年10月8日

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  • Zhenxing He,
  • Yuehan Liu,
  • Yanbo Bai,
  • Shuzhen Wang,
  • Xu Zhang,
  • Haibo Zhang

摘要

In steel spring floating slab tracks (FST), low support stiffness causes significant vibration when trains pass, leading to rail corrugation, stability issues, and reduced damping. This paper presents a shear-type vibration suppression device (ST-VSD) that improves FST stability. Comparative analysis shows the ST-VSD outperforms existing dynamic vibration absorbers (DVA). In investigations using a simplified dynamic model, under optimal DVA operating conditions with equivalent damping properties, the amplitude amplification factor of the floating slab with the ST-VSD installed reduced by 42.55 % compared to the DVA setup. In the train passing transient, the amplitude amplification factor decreased by 43.63 % relative to the DVA installation. The ST-VSD achieved vibration suppression of 26 %, 16.3 %, and 22.2 % for the car body, floating slab, and tunnel wall, respectively. Additionally, it reduces support force on steel springs, extending their service life, and its compact design allows for easy installation with minimal disruption to maintenance.