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<p>This study proposes a mathematical model to investigate axle load transfer induced by traction torque in railway vehicles. Unlike conventional models that neglect drivetrain dynamics, the proposed approach integrates the mechanical characteristics of the traction motor, gear assembly, gear housing, and wheelset into the vehicle dynamics model, with constraint equations derived through geometric analysis. The longitudinal motion equations are formulated using Lagrange’s method and the model’s validity is verified through comparison with a multibody dynamics model. In addition, the role of the drivetrain was analyzed by comparing the proposed model with an equivalent model without a drivetrain, and key factors influencing axle load transfer were investigated using the axle load transfer equation. This modeling framework enhances the understanding of the dynamic relationship between traction torque and axle load transfer, offering valuable insights for improving railway vehicle dynamics and slip control strategies.</p>

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Development of a dynamic model for axle load transfer induced by traction torque in railway vehicles

  • 期刊论文

  • 发表日期：

    2026年1月9日

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  • Ju Seok Kang

摘要

This study proposes a mathematical model to investigate axle load transfer induced by traction torque in railway vehicles. Unlike conventional models that neglect drivetrain dynamics, the proposed approach integrates the mechanical characteristics of the traction motor, gear assembly, gear housing, and wheelset into the vehicle dynamics model, with constraint equations derived through geometric analysis. The longitudinal motion equations are formulated using Lagrange’s method and the model’s validity is verified through comparison with a multibody dynamics model. In addition, the role of the drivetrain was analyzed by comparing the proposed model with an equivalent model without a drivetrain, and key factors influencing axle load transfer were investigated using the axle load transfer equation. This modeling framework enhances the understanding of the dynamic relationship between traction torque and axle load transfer, offering valuable insights for improving railway vehicle dynamics and slip control strategies.