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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 1    January 2018

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A prediction method of rail grinding profile using non-uniform rational B-spline curves and Kriging model
YANG Yue(杨岳)1, QIU Wen-sheng(丘文生)1, 2, ZENG Wei(曾威)1, XIE Huan(解欢)3, XIE Su-chao(谢素超)1

1. School of Traffic and Transportation Engineering, Central South University, Changsha 410075, China; 2. Guangzhou Large Scale Track Maintenance Machine Running and Maintenance Division, Guangzhou Railway Co., Guangzhou 511400, China; 3. School of Mechanical Engineering, Xijing University, Xi’an 710123, China

Abstract:Non-uniform rational B-spline (NURBS) curves are combined with the Kriging model to present a prediction method of the rail grinding profile for a grinding train. As a worn rail profile is a free-form curve, the parameterized model of a rail profile is constructed by using the cubic NURBS curve. Taking the removed area of the rail profile cross-section by grinding as the calculation index of the grinding amount, the grinding amount calculation model of a grinding wheel is established based on the area integral formula of the cubic NURBS curve. To predict the grinding amount of a grinding wheel in different modes, a Kriging model of the grinding amount is constructed, taking the travel speed of a grinding train, the grinding angle and grinding pressure of a grinding wheel as the variables, and considering the grinding amount of a grinding wheel as the response. On this basis, the prediction method of the rail grinding profile is presented based on the order-forming mechanisms. The effectiveness of this method is verified based on a practical application.

 

Key words: rail grinding; NURBS; Kriging; worn rail; target profile

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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