Dynamics simulation models of coupler systems for freight locomotive

Qing Wu*, Shi Hui Luo, Chong Feng Wei, Wei Hua Ma

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


The working principles of two types of coupler systems were analysed. Based on considering the friction pairs of coupler tails and real-time aligning shoulders, coupler system models were set up by using control system simulation method. Nonlinear draft gear with hysteresis characteristic was modelled by using table lookup method. DFC-E100 system and 13A/QKX-100 system were simulated in a train model consisting of two 8-axle locomotives and one simplified wagon. The theoretical calculation of carbody-stabilizing-coupler ability was performed. Calculation result indicates that the models can rationally reflect the dynamic behaviour of freight locomotive's coupler systems. The distinct angling behaviour of DFC-E100 system is only observed when buff forces are larger than a certain value, but the aligning shoulder of DFC-E100 system can effectively prevent coupler from excessive angling. The error of carbody-stabilizing-coupler ability between simulation value and field test value is 4.23%, and the error between theoretical calculation value and field test value is 10.65%. The friction pair of 13A/QKX100 system is key element in the control of coupler dynamic behaviour, and can prevent coupler from distinct angling under buff condition.

Original languageEnglish
Pages (from-to)37-43+52
JournalJiaotong Yunshu Gongcheng Xuebao/Journal of Traffic and Transportation Engineering
Issue number3
Publication statusPublished - Jun 2012
Externally publishedYes

Bibliographical note

Copyright 2012 Elsevier B.V., All rights reserved.


  • Coupler system
  • Dynamic characteristic
  • Freight locomotive
  • Railway vehicle
  • Simulation model

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Automotive Engineering


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