Comparative Test on Shape and Material of Rail Used for Heavy Haul Railway of 30 t Axle Load

被引：2

作者：

Zhang Y. ^{[1
]}

Li C. ^{[1
]}

Yu Z. ^{[1
]}

Li W. ^{[2
]}

Zhang S. ^{[3
]}

Gan F. ^{[4
]}

机构：

[1] Metals & Chemistry Research Institute, China Academy of Railway Sciences, Beijing

[2] Railway Engineering Research Institute, China Academy of Railway Sciences, Beijing

[3] Locomotive & Car Research Institute, China Academy of Railway Sciences, Beijing

[4] Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu, 610031, Sichuan

来源：

| 2018年 / Chinese Academy of Railway Sciences卷 / 39期

关键词：

30 t axle load; Dynamic testing; Heavy haul railway; Material; Profile; Rail; Rail type;

D O I：

10.3969/j.issn.1001-4632.2018.02.02

中图分类号：

学科分类号：

摘要：

8 kinds of rails with different types, profiles and steel grades were laid on a certain heavy haul railway for testing. Through field tests and simulation, comparative study was done concerning wheel-rail contact geometry, track structure dynamics, the dynamic performance of freight car and rail service performance etc. Analysis and comparison of rail profiles, types and steel grades were then done to propose rail selection strategies for heavy haul railway of 30 t axle load. Results show that when matching with LM profile wheel, the contact band on 60 rail deviates towards gauge corner, while those of 60N and 75N rails shift to the center part of tread and have an obviously lower contact stress. The equivalent conicity values of the measured 60, 60N and 75N rail coupled with LM wheel are respectively 1.35~1.5, 0.77~0.86 and 0.94~1.00 times of that of standard 75N rail. Under the total load of 8 000 t and 12 000 t, 60N and 75N rails have close track structure dynamics indexes, while 60 rail has the largest values. All three kinds of rails have slight influence on the dynamic indexes of freight cars. Suggestions of using 75 kg·m-1 rail with 75N profile on heavy haul railway of 30 t axle load are given. Rails with the tensile strength of 980 MPa or above are recommended for tangent track, while those with the tensile strength of 1 300 MPa or above are recommended for curved track.For curves with small radius where rolling contact fatigue dominates, the use of bainitic rails can be promoted. © 2018, Editorial Department of China Railway Science. All right reserved.

引用

页码：10 / 17

页数：7

共 10 条

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