Optimization And Performance Evaluation For Motor Suspension Swing Stiffness Of Quasi-high Speed Bogie

With anti-hunting broaden frequency band power-absorbing mechanism as the original technological innovation, the introduction of structural damping constraints, make up for defects of ICE3 bogie original design, the nominal equivalent conicity decreased from 0.166 to 0.10, and lower conicity without carbody shaking, uniformity wear of tread, wheel flange without side grinding or slight, restored partial self-steering ability of bogie, thus the technology of partial parameters to optimize has been required for quasi-high speed optimal distribution scheme. In order to better meet the performance requirements of high-speed bogie, Further, the research of optimization and performance evaluation for motor suspension swing stiffness of quasi-high speed bogie has been proposed by the paper.Anti-hunting broaden frequency band power-absorbing mechanism of quasi-high speed bogie to meet the lead-lag correction for unstable hunting oscillations of bogie by adaptively control, which has obvious low-speed bogie and high-speed performance, and low-speed performance has nothing to do with the general mass,which provides a reliable technical guarantee for deceleration hedge. Specifically, it isn’t necessary to adopt 2 train working diagram for the alpine region high-speed rail in the winter and summer. According to the effect of general mass on the performance of high-speed bogie, demonstrates the technical feasibility of increasing the motor suspension swing stiffness by motor stability diagram. In other words, increasing the motor suspension swing stiffness, which is equivalent to increasing the general mass of hunting oscillation, rear bogie stability margin of motor isn’t less than 5% as a principle, the technical feasibility of increasing the motor suspension swing stiffness. Acceleration relevance and lateral axle force as the evaluation technical indicators, further confirm the data range and optimal value of increasing the motor suspension swing stiffness. That is to say, lateral acceleration of motor rear carbody and response of motor swing acceleration, either of the maximums approximate or reach safety threshold. When approaching the maximum speed, the minimum lateral axle force of follow wheelset is the optimal value of motor suspension swing stiffness. With wide wheel flange tread XP55 and rail CN60 KG match, the nominal equivalent conicity is 0.10. Contrast of previous research achievements, it isn’t substantial impact that wearing characteristics of wheel profile, which made by the increasing of the motor suspension swing stiffness. According to the statistical regularities of mean square deviation for lateral displacement of wheelset, lateral displacement of front wheelset amplitude greater than follow wheelset in low-speed. However, it is opposite that lateral displacement of follow wheelset amplitude greater than front wheelset in high-speed conditions.Vehicle stability as linear stability analysis and dynamic simulation as nonlinear verification, both of them formed complementary analytical methods; With quasi-high speed optimal distribution scheme of anti-hunting broaden frequency band power-absorbing mechanism, restored partial self-steering ability of bogie; The effect of general mass on the performance of high-speed bogie, which determine the optimization of increasing the motor suspension swing stiffness by acceleration. Relevance and lateral axle force, it provides the necessary technical support for upgrade of high-speed bogie technology.