曲线半径和扣件参数对钢轨波磨的影响及优化研究OA

Aiming at the problem of rail corrugation on curved tracks,the influence of curve radius on corrugation was investigated and fastener parameters were optimized to control the corrugation.Based on the theory of friction-induced self-vibration,a vehicle dynamics model was established and the relationship between wheel-rail creep force and curve radius was analyzed.A three-dimensional wheel-rail coupled finite element model was then developed,and the complex eigenvalue analysis method was employed to study the occurrence of rail corrugation for different curve radii.Additionally,the orthogo-nal test method was used to analyze the influence of fastener parameters on rail corrugation.Results show that rail corruga-tion is prone to occur on the inner rail when the curve radius is less than 500 m,and the tendency of corrugation formation slows down when the curve radius exceeds 700 m.On a curved track with a radius of 300 m,the main frequency of wheel-rail friction-induced unstable vibration is 478 Hz,resulting in corrugation with a wavelength of 30-40 mm.Orthogonal test results indicate that the vertical stiffness of fasteners has the most significant impact on rail corrugation.Adjusting fastener parameters for different curve radii appropriately can effectively reduce the possibility of unstable self-excited vibration on small-radius curved section,thereby controlling corrugation.This study provides theoretical support and optimization schemes for suppressing rail corrugation on tracks with different curve radii,which helps to formulate targeted corrugation prevention measures,and improve rail maintenance efficiency.