自然科学版 英文版
自然科学版 英文版
自然科学版 英文版
自然科学版 英文版
英文版编委
自然科学版 英文版
英文版首届青年编委

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第50卷    第11期    总第303期    2019年11月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7207(2019)11-2813-10
地铁DTⅥ2扣件弹条力学特性及断裂研究
陈宪麦1,屈郑嘉1,陈文韬1,管吉波2,李岳涛3

(1. 中南大学 土木工程学院,湖南 长沙,410075;
2. 中国铁路设计集团有限公司,天津,300142;
3. 深圳市地铁运营集团有限公司,广东 深圳,518035
)

摘 要: 为分析DTⅥ2扣件弹条的力学性能,基于大型计算程序ABAQUS,建立扣件弹条有限元模型,并验证模型可靠性。研究结果表明:弹条应力产生的最大区域为弹条小圆弧内侧及跟端下侧与铁垫板接触部分,此区域易产生较大塑性变形、萌生裂纹并不断发展,在安装和养护维修过程中应加以关注;安装状态、摩擦因数和温度对扣压力影响相对较小,弹程对扣件弹条扣压力和最大等效应力影响较大;弹条特征部位的最大等效应力和垂向加速度在782~934,1 160~1 270和1 620~1 700 Hz频率范围出现3个明显的峰值,表明在这些频率下弹条易突然发生断裂。

 

关键词: DTⅥ2扣件;力学性能;弹条断裂

Study on mechanical properties and fracture of DTⅥ2 fastener elastic bar
CHEN Xianmai1, QU Zhengjia1, CHEN Wentao1, GUAN Jibo2, LI Yuetao3

1. School of Civil Engineering, Central South University, Changsha 410075, China;
2. China Railway Design Corporation, Tianjin 300142, China;
3. Shenzhen Metro Operation Group Co. Ltd., Shenzhen 518035, China

Abstract:In order to study the mechanical properties of DTⅥ2 fastener elastic bar, the finite element model for DTⅥ2 fastener was built based on ABAQUS, and the reliability of the model was verified. The results show that the maximum equivalent stress occurs in the rear arch of the clip and at the contact site of elastic bar and iron backing plate. Large plastic deformation and crack are likely to occur and develop in the zone, which should be paid attention to during installation and maintenance. The installation state, friction coefficient and temperature have little influence on the clamping force, and the vertical displacement of its finger has a great influence on the clamping force and the maximum equivalent stress. The maximum equivalent stress and vertical acceleration at feature sites of the fastener elastic bar have three distinct peaks in 782-934, 1 160-1 270 and 1 620-1 700 Hz, which indicates that it is easy to break suddenly at the specific frequencies.

 

Key words: DTⅥ2 fastener; mechanical properties; fracture of elastic bar

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
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号