Contrast Analyses Of High Speed Bogie Frames’ Dynamic Load Characteristics

The typical vibration failure forms of current high-speed rail, such as local hollow-type worn tread, gearbox oil spill and motor wheel-sets gearbox failures, are reflected two basic instability problems of high-speed rail vehicle in different degrees:The bogie stability margin isn’t abundant and high-speed train stability robustness problems. From the point of bogie frame’s dynamic load, bogie parameter configuration sensitive influence on hanging high impedance function. Therefore, two basic instability problems should be solved. Bogie parameter optimal configuration is not only to meet the requirements of high-speed train stable and robust performance, but also achieve dynamic system optimization architecture to ensure the safety of bogie dynamic.Combining with the characteristics of European vehicle structure, this paper adopted the dynamic simulation method to explore the dynamic characteristics of high-speed bogie frame, in accordance with the relevant international standards or specification framework dynamic security assessment. Trailer bogie frame as the research object and In view of the main dynamic architecture (not including longitudinal dynamic braking and traction), established the evaluation method for both bogie frame’s dynamic characteristics and circulation characteristics, such as3σ mean square value and large amplitude cyclic load. Combined with the existing different parameters configuration bogie, contrast analysis bogie frame’s dynamic correlation and explain the reason of temperature alarm troubles and anti-hunting damper premature ageing. Bogie’s stability margin is not abundant, anti-hunting damper’s load is low, axle box’s horizontal load is larger and lead to temperature alarm troubles. Instead, for the high-speed train stability robustness problems, anti-hunting damper’s load is too high and lead to node rubber aging. High-speed rail trailer bogie anti roll torsion bar dynamic presents abnormal change rule in350km/h. which offers a sufficient theoretical basis for the speed limit of300km/h. Germany Siemens bogie frame fatigue test outline and give the fatigue loading contrast experiments. Such as trailer’s node hysteresis nonlinearity, which result in the Twist load is very larger. Therefore, bogie parameters optimal match not only to achieve stable and robust performance of high-speed train, but also be dynamic system optimization of the technical requirementsThus, different from the conventional bogie, high-speed bogie is sensitive to an hanging high impedance parameter configuration. And high-speed rail abnormal dynamic law will cause two basic unstable problems. If the bogie stability margin is not abundant, axle horizontal force is larger, so the trailer frequent occur temperature alarm failure. At the same time, the tread wear has local hollow-type worn tread characteristics. If the anti-hunting series stiffness is high, the stability margins are difference between motor and trailer bogie. Thus, In wheel/rail running-in period, the anti roll torsion bar dynamic is so large that the trailer train bogie stability margin become very bad, which may cause high-speed train stability robustness problems. Therefore, high-speed typical vibration fatigue problem should not ignore, because they have a close relationship to two unstable basic problems. In order to ensure high-speed rail safety redundancy and prevent vibration fatigue problem, High-speed train stability robust performance was achieved by optimum. which ensure bogie frame dynamic system optimization and smooth process in300km/h.