Analysis Of The Influence Of Suspension Parameters On Dynamic Performance Of Heavy Haul Locomotive

Nowadays,with the rapid development of society,the railway transportation industry is facing new problems and challenges as the main means of transport.Locomotive technical level has been continuously improved,and the railway transportation industry is moving towards the direction of fast and heavy load.Need to carry out technical reform,breaking the limitations of the original,and then transform.As an indispensable part of railway transportation,the key point of this paper is to study the dynamic problems.The main effect of suspension parameters on locomotive dynamics,Give the improvement suggestions,contrast dynamic performance,and verify the rationality of the improved scheme,to improve the performance of the locomotive dynamics.Through the summary of the domestic and foreign development of locomotive dynamics,Analysis of domestic and foreign experts,master the advanced research,provide an effective reference for the work of the paper.Based on the theory of vehicle/track system dynamics,and based on the locomotive and track data,use software to build a complete locomotive/track dynamic model.By using the method of control variables,only analysis of the single variable changes.And multivariate analysis for key parameters of suspension.Through the analysis of the dynamic performance of locomotive with different suspension parameters under two conditions of straight line and curve line.The stability of the locomotive can be improved by adding the longitudinal and lateral positioning stiffness of the primary suspension;But with a large longitudinal and lateral positioning stiffness of the primary suspension,the lateral stiffness and damping of the secondary suspension are not conducive to improving the performance of the curve;The longitudinal and lateral positioning stiffness of the primary suspension and longitudinal/lateral stiffness and damping of the secondary suspension increases,can add improved locomotive lateral stability,lateral damping stability coefficient is decreased with the increase of the and curve through the ability;Vertical stability coefficient will decreases with vertical positioning stiffness of the primary suspension increases,Vertical stability coefficient will increases with the vertical stiffness of the secondary increases.The vertical force and vertical stability of wheel/rail have the minimum value of the vertical damping of the primary and secondary increases.According to the influence of suspension parameters on the dynamic performance of the trend,Selection of new suspension parameters,establish the improved model comparison with the previous dynamic performance,the performance can be improved.So the improved scheme is more reasonable.