Utilizing the multi-body dynamics software Simpack,a dynamics model was established for an articulated hot metal la-dle car.The axle load distributions across different articulated positions were obtained from both theoretical calculations and simulations.Based on a comparative analysis the curve passing performance of the hot metal ladle car at different articulated positions,the optimal ar-ticulation position was determined,taking into account the axle load distributions,and the nonlinear critical speed of the hot metal ladle car at this optimal articulation position was verified.Further exploration was conducted to investigate the influence of line parameters,such as track irregularities and curve radii,as well as operating speeds on the operational safety of the car on small-radius curves.The re-sults indicate that the optimal articulation position can be attained when the longitudinal distance from the center of the bolster spring to the first position wheelset's center is half of that to the articulation point at the rear arm of the middle axle box,ensuring a balanced load distribution among the car axles and the optimal curve passing performance.The nonlinear critical speed of the hot metal ladle car is identified to be 40 km/h,which meets the operational requirements with a safety margin.Moreover,track irregularities exert a significant influence on the operational safety performance indexes of the car on small radius curves,followed by curve radii.In contrast,the influ-ence of curve superelevation is found less significant.Meanwhile,operating speeds are chosen to ensure operational safety under differ-ent track irregularity and curve radius conditions.
关键词
铁水罐车/动力学性能/铰接式三轴转向架/轴重均衡/曲线通过安全性/运行参数
Key words
hot metal ladle car/dynamic performance/articulated three-axle bogie/axle load balance/curve passing safety/operatine parameter
维普
万方数据