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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第12卷    第5期    总第68期    2015年10月

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文章编号:1672-7029(2015)05-0990-08
一种计算高速铁路轨道结构精确解的方法
易强1,2,王平1,2,赵才友1,2

(1.西南交通大学高速铁路线路工程教育部重点实验室,四川成都 610031;
2.西南交通大学土木工程学院,四川成都 610031
)

摘 要: 高速铁路轨道具有无限周期结构特征。对于无限周期轨道结构的计算,有限元法和规范建议公式都是近似的解法。而U变换法是针对无限周期结构提出的一种精确求解方法。基于U变换法,计算得到2种具有无限长周期结构特征的轨道模型在静荷载作用下的精确解。通过与有限元法和规范建议的公式计算结果对比,结果表明:U变换法与有限元法及规范建议的公式计算结果十分接近。据此可以证明U变换法是一种计算无限周期轨道结构精确解的有效方法。

 

关键字: 高速铁路;轨道结构;周期性;U变换;精确解

Exact solutions for the high speed railway track structure
YI Qiang1,2,WANG Ping1,2, ZHAO Caiyou1,2

1. MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China;
2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China

Abstract:The high speed railway track has been provided with visible infinite periodic characteristic. As for the calculation of infinite periodic track structure, the finite element method and the formula suggested by the code are both approximated methods. However, U-transformation is an exact method which is put forward to solve the infinite periodic track structure. Based on the U-transformation, the exact solutions of two types of track model with infinite periodic structure characteristics under static load have been studied in this paper. Through the comparison with the finite element method and the formula of code. The results indicate that: the solution of U-transformation are very promising with the finite method and code. It could be verified that the U-transformation is an efficacious method for the calculation of infinite periodic track structure.

 

Key words: high speed railway; track structure; periodic; U-transformation; exact solution

ISSN 1672-7029
CN 43-1423/U

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