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| Influence of wheel polygon on locomotive wheel-rail dynamic response |
| LIU Huan1,2，TAO Gongquan1，CAI Jing3，LUO Yun1，CHEN Guosheng2，WEN Zefeng1 |
1.State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China;
2.The State Key Laboratory of Heavy Duty AC Drive Electric Locomotive Systems Integration, Zhuzhou 412001, China;
3.Development Research Institute, Guangdong Power Grid Planning & Research Center, Shantou 515041, China |
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Abstract The wheel polygonal wear is very serious for some HXD electric locomotives, which has an adverse influence on the components’ failure, ride quality and running safety of the locomotives. In order to investigate the influence of wheel polygon on the locomotive wheel-rail dynamic response, a simulation model considering the traction behavior of the locomotive and the flexibilities of important components such as wheelset and rail, was established with commercial software SIMPACK. The model was validated by the field measurement results of locomotive vibration. The influence of wheel polygon order, amplitude and running speed on wheel-rail force and locomotive vibration was studied, moreover the influence on locomotive traction on wheel-rail creepage/creep force and wear number was analyzed. The results show that the change of wheel-rail force and axle box vibration is the most intense, due to the first bending resonance of wheelset excited by wheel 18 order polygon at the speed of 70 km/h. The traction behavior increases the fluctuation amplitude of the longitudinal creepage and the longitudinal creep force, which causes a great increase of wear number and development of wheel polygonal wear compared with that without traction.
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Received: 28 November 2018
Published: 15 August 2020
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