考虑转向架特性的列车灵活编组作业动力学响应研究OA

Because the safety and comfort implications of flexible marshalling operations have received limited attention,this study compares a conventional longitudinal dynamics model with a refined model that represents the carbody-bogie-frame-wheelset system.Relevant performance indices are analyzed using both models,and a preliminary comparison with coupling tests on Beijing Metro Line 3 is conducted.Differences in train displacement,acceleration,and jerk predicted by the two models at different coupling speeds are examined.The simulation results show that,at marshalling speeds of 3 and 5 km/h,the refined model predicts train displacements that are 52.9%and 53.1%greater,respectively,and vibration accelerations that are 12.2%and 20.5%greater,respectively,than those predicted by the conventional model.Under different gradients,downhill marshalling pro-duces a train displacement up to 89%greater than that under uphill conditions,indicating a higher risk of unintended rolling and reduced operational safety;however,acceleration decreases by 5%,suggesting a modest improvement in passenger comfort.Coupling tests on a test track show that,at 5 km/h,the refined model agrees more closely with the experimental results,reducing the rela-tive error by approximately 30%compared with the conventional model.This confirms the feasi-bility of the refined model in simulating actural train-coupling scenarios.