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第36届中国控制会议

作者： Xiangxiang Zhou Lu Wang Yong Zhang Zongyi Xing School of Automation Nanjing University of Science and Technology

ISBN: (纸本)9781538629185

A curve fitting method based on automatically extracting subsection points is proposed to fit the wheel tread profile accurately. Firstly, the subsection points are determined by segmenting discrete points of wheel tread profile based on given errors and threshold. Secondly, the segmentation interval is determined with the respective segment point as the center, and the least squares curve fitting is performed on the data points of each segment based on the concept of segmentation interval. Thirdly, the least square curve fitting method is adopted to fit all data points in the interval. Finally, all curves are connected to a smooth curve by adopting Lagrange multiplier method. The data were obtained in the field to fit curve by extracting subsection points automatically. The result showed that the wheel tread profile fitted by this method is smooth at subsection points. The mean absolute error is 0.045 mm and the largest offset amplitude is 0.05%. Compared with the manual segmentation method, the automatic segmentation method is more accuracy and effective. The method has been applied into the auto wheel-size detection system and the detected results are more accurate.

关键词： wheel profile automatic extraction of subsection points subsection curve fitting Lagrange multiplier method

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Implementations of newly developed wheel and rail profile design methods

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Journal of Traffic and Transportation Engineering(English Edition) 2014年第3期1卷 221-227页

作者： Gang Shen Xiaobo Zhong Institute of Railway and Urban Mass Transit Tongji University

The developments of a series of wheel or CADF contact functions are briefly described. profile computer aided methods based on the RRDF Since 2001 the implementations of these methods are carded out according to different requirements for tramway vehicles, metro vehicles, and main line EMU vehicles etc. It is found that the main advantage of these new methods in wheel profile design is obtaining the proper wheel profiles to efficiently reduce the wears of wheel and rail and to improve the performances of both stability and curving performances. Moreover, post process of transfering a profile with discrete points to a profile with arc and line combinations is studied with a high precision.

关键词： wheel profile design method RRDF CADF

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维普期刊数据库

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wheel-rail profiles Matching Design Considering Railway Track Parameters

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Chinese Journal of Mechanical Engineering 2010年第4期23卷 410-417页

作者： CUI Dabin LI Li JIN Xuesong LI Ling School of Mechanical Engineering Southwest Jiaotong University Chengdu 610031 China State Key Laboratory of Traction Power Southwest Jiaotong University Chengdu 610031 China

The profile of wheel/rail has great concern with the vehicle running safety, the wheel/rail wear and the rolling contact fatigue between wheel and rail, due to its severer impact on the dynamic behavior of both the railway vehicle/track, and the wheel/rail rolling contact status. However, recent studies in this respect are mainly explored in reverse methods, where track parameters are predetermined and invariable during the optimizing process. This paper attempts to propose a wheel-rail profiles matching design method considering multi-parameter, through optimizing wheel/rail profile under different rail cants and track gauges, based on the existed optimization technology for the normal gap of wheel/rail. The method presented in this paper can also, compared with the prior reverse methods, be called ＂forward solution method＂ in which the riding comfort, wheel unloading rate and wheel/rail contact stress of the speed-up railway passenger car are calculated by means of a vehicle-track coupling dynamic model, with the range of the rail cant varying from 1/20 to 1/40 and the rail gauge from 1 433 mm to 1 441 mm. These results show that the distribution status of the pairs of contact points can be obviously improved and the contact stress can be reduced significantly; a great influence is exposed by the rail cant and track gauge on the dynamic behavior of the high speed passenger car, and an optimal vehicle dynamics behavior are obtained with the optimized wheel/rail profile when the rail cant is 1/30 and the track gauge is 1 435 mm. This research can provide important references for the investigation of the wheel-rail profiles matching design method considering multi-parameter.

关键词： wheel profile optimization dynamic behavior rail cant track gauge

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Development and validation of a model for predicting wheel wear in high-speed trains

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2017年第8期18卷 603-616页

作者： Gong-quan TAO Xing DU He-ji ZHANG Ze-feng WEN Xue-song JIN Da-bin CUI State Key Laboratory of Traction Power Southwest Jiaotong University Chengdu 610031 China Department of Mechanical Engineering Emei Campus of Southwest Jiaotong University Emei 614202 China

In this paper, we present a comprehensive model for the prediction of the evolution of high-speed train wheel profiles due to wear. The model consists of four modules： a multi-body model implemented with the commercial multi-body software SIMPACK to evaluate the dynamic response of the vehicle and track; a local contact model based on Hertzian theory and a novel method, named FaStrip （Sichani et al., 2016）, to calculate the normal and tangential forces, respectively; a wear model proposed by the University of Sheffield （known as the USFD wear function） to estimate the amount of material removed and its distribution along the wheel profile; and a smoothing and updating strategy. A simulation of the wheel wear of the high-speed train CRH3 in service on the Wuhan-Guangzhou railway line was performed. A virtual railway line based on the statistics of the line was used to represent the entire real track. The model was validated using the wheel wear data of the CRH3 operating on the Wuhan- Guangzhou line, monitored by the authors＇ research group. The results of the predictions and measurements were in good agreement.

关键词： High-speed train wheel profile wheel/Rail contact wheel wear prediction

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