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<p>The contact problem describing a railway vehicle — road — track ballast system is under our investigation. During the motion, the rolling stock (snowpiercer) is represented by a moving localized load, the road by a Timoshenko beam, and the track bed material is rigorously modeled using 3-by-3 matrices of stress and strain rate. To ensure physical consistency, the Kolymbas-type hypoplasticity theory well-suited for cohesionless granular materials is applied to describe the ballast. As a result, the normal stress and shear stress on the interface between the rail bottom and ballast are analytically derived from the closed-form solution to the nonlinear hypoplastic differential equation.</p>

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MODELING THE RAILWAY TRACK BALLAST BEHAVIOR WITH HYPOPLASTICITY

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年2月22日

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  • Erich Bauer,
  • Victor A. Kovtunenko,
  • Pavel Krejčí,
  • Giselle A. Monteiro,
  • Laetitia Paoli,
  • Adrien Petrov

摘要

The contact problem describing a railway vehicle — road — track ballast system is under our investigation. During the motion, the rolling stock (snowpiercer) is represented by a moving localized load, the road by a Timoshenko beam, and the track bed material is rigorously modeled using 3-by-3 matrices of stress and strain rate. To ensure physical consistency, the Kolymbas-type hypoplasticity theory well-suited for cohesionless granular materials is applied to describe the ballast. As a result, the normal stress and shear stress on the interface between the rail bottom and ballast are analytically derived from the closed-form solution to the nonlinear hypoplastic differential equation.