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ÖÐͼ·ÖÀàºÅ£ºTH113 ÎÄÏ×±êÖ¾Â룺A doi£º10.3969/j.issn.1006-0316.2023.04.007

ÎÄÕ±àºÅ£º1006-0316 (2023) 04-0045-08

Study on Running Safety of Unloaded Wagon on Curves under the Effect of Compression Coupler force

DAI Hongyuan1£¬LI Yuefei1£¬YANG Hai1£¬LI Jiandong1£¬WANG Jun1£¬CHEN Qinghua2

( 1.Inner Mongolia Yitai Huzhun Railway Co., Ltd., Ordos 017000, China; 2.State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China )

Abstract£ºAs the running speed of heavy-haul train continues to increase, the safety problems at small radius curve sections become more and more prominent. Focusing on the running safety of unloaded wagons, a detailed 3-pack wagons model has been established based on the vehicle dynamics theory. By employing the model, the wheel-rail interaction characteristics of the unloaded wagon passing through the curve section under the effect of the compression coupler forces are analyzed, and the influence of the key parameters of the curve track on the running safety of the vehicle is further investigated. The results indicate that the wheel unloading problem of the unloaded wagon is prominent in the small radius curve sections, and the safety indices increase with the increase of the compression force. It is revealed that the proper increase of super elevation and the transition curve length can mitigate the wheel unloading. Meanwhile, the proper increase of super elevation can reduce the lateral wheel-rail interaction, and the vertical wheel-rail interaction decreases with the increase of the transition curve length. To enhance the running safety of vehicle in small radius curve sections, the super elevation and the transition curve length can be adjusted appropriately in the track maintenance.

Key words£ºheavy haul railway£»unloaded wagon£»small radius curve£»compression coupler force£»running safety

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