Mechanics based lateral stability design for a railway Electric Multiple Unit

• Bo Wang ^[1] ; Qing Wu ^[2] ; Weihua Ma ^[1]
  1. [1] Southwest Jiaotong University

     Southwest Jiaotong University

     China

     
  2. [2] Central Queensland University

     Central Queensland University

     Australia

     
• Localización: Mechanics based design of structures and machines, ISSN 1539-7734, Vol. 52, Nº. 12, 2024, págs. 10746-10760
• Idioma: inglés
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• Resumen

  • This paper presented a mechanics-based method to address the typical lateral stability issue of railway trains. A Base Electric Multiple Unit (Base EMU) and an upgraded EMU were used as the research objects. Mechanics-based models were developed for both systems; the Base EMU model was validated using actual test data. Different wheel-rail equivalent conicity values and suspension parameters were investigated. The results showed that inadequate wheel-rail guiding capacity under low conicity can led to the occurrence of lateral stability issues. When the train is pushed by motor cars, coupler lateral forces aggravate stability issues. Altering the yaw damper’s angle and damping properties can significantly reduce lateral swaying and improve the ride index. This represents a low-cost and favored solution. Decreasing the stiffness of the axle box pull rod is also effective in mitigating low-frequency lateral swaying.