[1]尹紫红,朱仁政.弹射冲击荷载作用下有砟铁路路基参数敏感性研究[J].地震工程与工程振动,2019,39(04):204-212.[doi:10.13197/j.eeev.2019.04.204.yinzh.021]
 YIN Zihong,ZHU Renzheng.Parameters sensitivity research of ballast railway subgrade under ejection impact loading[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2019,39(04):204-212.[doi:10.13197/j.eeev.2019.04.204.yinzh.021]
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弹射冲击荷载作用下有砟铁路路基参数敏感性研究
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《地震工程与工程振动》[ISSN:/CN:]

卷:
39
期数:
2019年04
页码:
204-212
栏目:
论文
出版日期:
2019-09-30

文章信息/Info

Title:
Parameters sensitivity research of ballast railway subgrade under ejection impact loading
作者:
尹紫红 朱仁政
西南交通大学 土木工程学院, 四川 成都 610031
Author(s):
YIN Zihong ZHU Renzheng
School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
关键词:
弹射冲击荷载有砟铁路路基本体参数敏感性轨道-路基系统
Keywords:
ejectionimpact loadingballast railwaysubgrade bodyparameter sensitivitytrack-subgrade system
分类号:
U213.1
DOI:
10.13197/j.eeev.2019.04.204.yinzh.021
摘要:
铁路机动列车机动时,路基本体材料参数对轨道-路基系统动力响应的影响研究缺乏。本文基于弹塑性理论,借助非线性有限元软件ANSYS,开展弹射冲击荷载作用下有砟铁路路基本体材料力学参数对轨道-路基系统动力响应影响的研究。研究表明:(1)路基本体材料力学参数中弹性模量的灵敏度最大,黏聚力和内摩擦角次之,泊松比的灵敏度较小,而质量阻尼、刚度阻尼对等效动应力影响甚微;(2)路基本体的材料力学参数对钢轨破损、轨道不平顺等现象不能起到有效弱化作用,而其质量阻尼与刚度阻尼对整个轨道-路基系统等效动应力的衰减影响甚微;(3)减小路基本体弹性模量虽然可有效减小基床等效动应力,从而减弱基床病害,但同时也增大了轨枕动应力,因此并非弹性模量越小越有利。
Abstract:
The railway train maneuvering, the research of the subgrade body material parameters’s influence on the dynamic response of the track-subgrade system had been lacking. Based on the elastoplastic theory, the nonlinear finite element software ANSYS was used to study the subgrade body material parameters’s influence on the equivalent dynamic stress of the track-subgrade system under ejection impact loading. The research shows that:(1)The elastic modulus among the subgrade body material parameters has the greatest influence, the cohesion and internal friction angle are the second, the Poisson’s ratio has less influence, and the mass damping and stiffness damping have almost no effect on the response; (2) The material mechanical parameters of the subgrade body can not effectively weaken the phenomenon of rail breakage and track irregularity, and its mass damping and stiffness damping have almost no effect on the attenuation of the equivalent dynamic stress of the entire track-subgrade system; (3) Reducing the elastic modulus can effectively reduce the equivalent dynamic stress of the foundation bed, thereby weakening the bed disease, but it also increases the dynamic stress of the sleeper, therefore, it is not advantageous that the elastic modulus is smaller.

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备注/Memo

备注/Memo:
收稿日期:2018-8-1;改回日期:2018-12-7。
基金项目:国家重点研发计划项目(VP99QT136Y17001)
作者简介:尹紫红(1971-),男,副教授,博士,主要从事道路与铁道工程研究,E-mail:71yzh@163.com
更新日期/Last Update: 1900-01-01