Influence Of Planar And Vertical Parameters On Dynamic Performance Of 200 Km/h Locomotive

For 200 kilometers per hour railway line. Whether it is a new or existing railway raised speed. First,all of passenger trains are EMU. Although their performance is excellent, but they are expensive.lt is very high for requiring of railway. Considering the technical and economic factors, EMU and locomotive traction mode co-existed is more suitable for our country.Secondly, By studying the relevant technical specifications of railway.Currently railways of 200km/h level mostly refer to related standards of high-speed railway. The requiring is very high. For the transformation of the existing railway raised to 200 km/h level, some railways are hard to meet the requirements. The cost of the new railway Increases. Finally, using traditional methods have been unable to meet the design requirements for railways of 200km/h level. With the gradually improving of dynamics simulation, it is playing an increasingly important role in the designing of railways. So the combination of dynamic simulation to design the railway line is the future trend of development. Therefore,researching the influence of plane and vertical design parameters on dynamic performance of a 200 km/h locomotive is necessary.Using software of multi-rigid-body dynamic,established a simulation model about electric locomotive of 200km/h level. Stability is analyzed in a straight line conditions. Linear critical speed and non-linear critical speeds are 700km/h and 300km/h. Through the establishment of a plane curve conditions, the impact of the plane parameters on dynamic performance of the locomotive are analyzed. The results show that, the influence of two kinds of superelevation is not obvious. When the superelevation is balanced, the security of locomotive is best. The body’s vertical acceleration increases with the increasing of the superelevation. The length of straight line between two curves is not less than 0.4Vmax.When Curve radius is small, the influence of the security is significant because of Changing of the radius. With radius increasing, the influence becomes slowly. When the length of transition curve is small, its length Increases appropriatly, the dynamic performance of the locomotive can be greatly improved.The paper also analyzes the impact of the vertical design parameters on the dynamic performance of the locomotive. The results show that, With the increasing of vertical curve radius, the safety and stability of locomotive gradually increase. After joining the German railway spectra of high irregularity, the results of simulation show that convex vertical curve is slightly better than the concave vertical curve. Compared with not adding track spectrum. The body’s vertical acceleration increases slightly. The minimum recommended length of straight line between two curves is not less than 0.6Vmax based on the stability of locomotive.Finally, the paper studied the dynamic performance of the locomotive on the matching between plane curve and concave, convex vertical section. The results show that, through the judgment of the lateral force of the wheel-rail,lateral acceleration of the vehicle body, derailment coefficient and the rate of wheel load reduction,it shows that concave vertical section is better than convex vertical section.The influence of the wheel-rail lateral force,derailment coefficient and lateral acceleration of the vehicle is small for the overlap position setting of circular curve and vertical curves. Maximum vertical acceleration of the vehicle body is little difference, only appearing in different positions.