Wheel-Rail Contact Relationship in Turnout Area of Mixed Passenger and Freight Railway Based on 60N Rail Profile
In order to study the wheel-rail relationship in the turnout area of a mixed passenger and freight railway using a 60N steel rail profile,a multi-body dynamic model was first established by comparing the standard 60 kg/m steel rail.Starting from the characteristic cross-sections of the guide curve area,switch area,and frog area,the baseline method was used to study the changes in key wheel-rail contact geometric parameters such as wheel-rail contact position and wheel diameter difference when using two types of steel rail profiles.Then,a finite element model for wheel-rail contact was established and the changes in wheel-rail contact stress at each characteristic section were calculated and analyzed.The results show that compared to the standard 60 kg/m rail,when the wheel is matched with the 60N rail profile,the distribution of contact points is more concentrated,the difference in wheel diameter is smaller,the contact spot is elliptical,and the stress growth is relatively gentle,but the transition is more rapid in the switch and frog areas.The 60N profile is more suitable for guide curve sections with simpler operating conditions,while the standard 60 kg/m profile is more suitable for switch and frog areas with more complex operating conditions.
mixed passenger and freight railwayturnoutwheel-rail relationshipmodel testfinite element analysisgeometric relationshipcontact stress
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