Abstract：Research purposes : The minimum curve radius is one of major technical standards on heavy haul railway， impacting on running safety and stability of the heavy haul vehicle. On the basis of the research at home and abroad on the minimum curve radius of heavy haul railway， a vehicle - track dynamic model on the curve section of heavy haul railway is established based on the dynamics theory and dynamic characteristics of the vehicle - track system on heavy haul railway in different curve radius conditions are analyzed by the model. Then the influence law of curve radius on vehicle - track dynamic performance is studied. Research conclusions :( 1) The curve radius of the heavy haul railway has varying degrees of impact on running safety and stability of heavy haul vehicle，wheel - rail interaction and wheel - rail wear of heavy haul railway. (2) When the radius of curve is less than 800 m，vehicle - track dynamic performance will be decreased rapidly on the condition of reducing the radius of curve , When the radius of curve is more than 1 000 m，vehicle - track dynamic performance will be improved in a certain degree while increasing the radius of curve，but the improvement is limited; Especially，when the radius of curve is more than 1 500 m，the change of the radius of curve has little effect on vehicle - track dynamic performance. (3) It is suggested that the minimum curve radius of heavy haul railway is 1 000 m on general conditions and on difficult conditions 800 m is allowed. (4) The radius of curve should be not less than 1 500 m as far as possible while designing heavy haul railway line. (5) The research result can provide a reference to design the curve of heavy haul railway and formulate related normative documents.
2016, Vol. 33 
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