Dynamics Analysis Of Type HX_D1C Electric Locomotive With Radial Bogies

To reduce the wheel flange wear, balance the curving performance and hunting stability, radial bogie has been researched all over the world. Type HXqIC electric locomotive is a new generation main heavy haul high power locomotive which is introduced and re-innovated by CSR Zhuzhou Electric Locomotive Co., Ltd. Applying the radial bogie technology to this locomotive has a broad prospect. Considering the limit to its structure and parameters, there are some inherent difficulties. This thesis certifies the HTCR radial bogie technology introduced by CSR Ziyang Electric Locomotive Co., Ltd, can be successfully applied to Type HXDIC electric locomotive without changing the axle base, traction and braking and connecting method.Models of type HXDIC electric locomotive with conventional bogies, elastic connecting rod radial bogies and rigid connecting rod radial bogies are established by SIMPACK, the multi-body dynamics simulation software. Simulation and analysis of their hunting stability, straight stability and curving performance are made. It shows that whether the connecting rod is elastic mainly influences the hunting stability. Elastic model has a slightly higher linear and nonlinear critical velocity than rigid model. Comparing the dynamic Performances of Type HXD1C electric locomotive with conventional bogies and radial bogies shows that the locomotive with radial bogies can meet the running need at 120 km/h and the straight performance is good. The curving performances are superior to the locomotive with conventional bogies except lateral and vertical accelerations. The wear of the locomotive with radial bogies is much lower. The wheel flange wear factor and the wheel wear work decrease by above 46% and the former one decreases more.The suspension parameters of the locomotive with radial bogies are optimized. The reasonable ranges of primary and secondary suspension stiffness, primary and secondary damper damping are set up through analysis. It proves that design values of those parameters are appropriate.The influence of different distributing cases of rolling radius difference (RRD) on curving performance of 3 axles radial steering bogie is analyzed.7 extreme cases which may be the worst situations are picked within 19 typical RRD distributing cases. Simulation is made under R300m and R800m curve with AAR5 track irregularity. The results show that different RRD distributing cases have different influence on dynamic performance of radial steering bogie. The RRD in opposite phase (the smaller diameter wheels of front and middle wheel-set are on outer rail, the smaller diameter wheel of rear wheel-set is on inner rail) and the RRD in same phase (all of the three wheel-sets have the same side RRD) are the worst. The maximum value of guidance force and derailment coefficient decrease with the opposite phase RRD’s increase under R300m curve. The maximum value of rest indexes increase with the RRD’s increase. These two RRD types need to be focused during application and maintenance.