التفاصيل البيبلوغرافية
| العنوان: |
Study on Rail Profile Optimization Based on the Nonlinear Relationship between Profile and Wear Rate. |
| المؤلفون: |
Wang, Jianxi, Ren, Zhiqiang, Chen, Jinjie, Chen, Long |
| المصدر: |
Mathematical Problems in Engineering; 6/20/2017, p1-12, 12p |
| مصطلحات موضوعية: |
RAILROADS, MECHANICAL wear testing, NONLINEAR theories, SERVICE life, GENETIC algorithms, SUPPORT vector machines |
| مستخلص: |
This paper proposes a rail profile optimization method that takes account of wear rate within design cycle so as to minimize rail wear at the curve in heavy haul railway and extend the service life of rail. Taking rail wear rate as the object function, the vertical coordinate of rail profile at range optimization as independent variable, and the geometric characteristics and grinding depth of rail profile as constraint conditions, the support vector machine regression theory was used to fit the nonlinear relationship between rail profile and its wear rate. Then, the profile optimization model was built. Based on the optimization principle of genetic algorithm, the profile optimization model was solved to achieve the optimal rail profile. A multibody dynamics model was used to check the dynamic performance of carriage running on optimal rail profile. The result showed that the average relative error of support vector machine regression model remained less than 10% after a number of training processes. The dynamic performance of carriage running on optimized rail profile met the requirements on safety index and stability. The wear rate of optimized profile was lower than that of standard profile by 5.8%; the allowable carrying gross weight increased by 12.7%. [ABSTRACT FROM AUTHOR] |
|
Copyright of Mathematical Problems in Engineering is the property of Hindawi Limited and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Full Text Finder