首页|基于调整护轨轨向不平顺的无缝线路稳定性提高方法

基于调整护轨轨向不平顺的无缝线路稳定性提高方法

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为使护轨充分发挥作用,采用有限元方法建立无缝线路稳定性分析模型,研究了护轨初始弯曲方向对无缝线路稳定性的影响;基于轨道不平顺和护轨与基本轨头部之间净距限值要求,提出了一种通过调整护轨轨向不平顺来提高无缝线路稳定性的方法,并进行了仿真验证.结果表明:当护轨初始弯曲方向与基本轨相反时,可提高无缝线路的稳定性,且提高程度随曲线半径增大而增加;以轨道不平顺作为钢轨初始弯曲,利用本文方法调整护轨轨向不平顺后,外侧基本轨横向位移大幅降低,钢轨容许温升大幅提高;曲线半径为3 000 m时,按护轨无缝化的最不利工况考虑,采用本文方法可使无缝线路钢轨容许温升提高31.9℃.本文方法适用于不同曲线半径条件,对曲线半径较大无缝线路的稳定性提高效果更为显著.
A Method for Improving Stability of Continuous Welded Rail Based on Adjusting Direction Irregularity of Guard Rail
In order to fully utilize the guard rail,a finite element method was used to establish a stability analysis model for continuous welded rail(CWR),and the influence of the initial bending direction of the guard rail on the stability of CWR was studied.A method for improving the stability of CWR by adjusting the irregularity of the guard rail direction was proposed based on the requirements of track irregularity and the net distance limit between the guard rail and the basic rail head,and simulation verification was conducted.The results show that when the initial bending direction of the guard rail is opposite to the basic rail,the stability of the CWR can be improved,and the degree of improvement increases with the increase of the curve radius.Taking track irregularity as the initial bending of the steel rail,the lateral displacement of the outer basic rail is significantly reduced,and the allowable temperature rise of the steel rail is significantly increased after using the method described in this article to adjust the unevenness of the guard rail direction.When the curve radius is 3 000 m,considering the most unfavorable working condition of seamless guard rail,the method proposed in this article can increase the allowable temperature rise of CWR by 31.9℃.This method is applicable to different curve radius conditions and has a more significant effect on improving the stability of CWR with larger curve radius.

heavy haul railwayguard railnumerical calculationstabilityCWRtrack direction irregularityinitial bending direction

赵志荣、张云飞、王琪、谢铠泽

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国能朔黄铁路发展有限责任公司, 河北 肃宁 062350

石家庄铁道大学 土木工程学院, 石家庄 050043

石家庄铁道大学 基础设施安全与应急铁路行业重点实验室, 石家庄 050043

重载铁路 护轨 数值计算 稳定性 无缝线路 轨向不平顺 初始弯曲方向

国家自然科学基金国家自然科学基金河北省自然科学基金国能朔黄铁路发展有限责任公司技术开发项目

5200827251978423E2022210046GJNY-20-230

2024

10.3969/j.issn.1003-1995.2024.02.08

铁道建筑
中国铁道科学研究院

铁道建筑

北大核心
影响因子：0.623
ISSN：1003-1995
年,卷(期)：2024.64(2)
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