Research on Freight Car Wheelset Status Recognition Based on Wheelset Lateral Displacement
Railway heavy haul has become a new direction for the development of railway freight transport in China due to its high economic benefits.The faults in wheelsets pose a threat to the safe and smooth operation of vehicles.It is necessary to carry out real-time monitoring of freight car wheelset status to predict the wheel status,ensure normal vehicle operation and improve maintenance efficiency.Based on the trackside inspection device,this paper conducts real-time monitoring of the freight car wheelset lateral displacement,defines the wheelset lateral displacement,analyzes its relationship with wheelset hunting instability,and proposes a method for determining the hunting instability based on the wheel-rail lateral displacement,as well as monitoring limits.By establishing a freight car-track rigid-flexible coupling dynamic model for simulation,and comparing and analyzing the measured data,this paper studies the mapping relationship between wheelset lateral displacement and wheel diameter difference,and eliminates the influence of wheel diameter difference inversion error caused by wheelset hunting instability.The study results indicate that by inspecting the wheelset lateral displacement to assess the vehicle instability status and invert the wheel diameter difference,the freight car wheelset status can be recognized,demonstrating significant engineering application value.
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