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不同移动荷载速度下轨道结构动态响应研究

张妍 刘彦琦 宋春芳

张妍, 刘彦琦, 宋春芳. 不同移动荷载速度下轨道结构动态响应研究[J]. 机械科学与技术, 2018, 37(12): 1841-1846. doi: 10.13433/j.cnki.1003-8728.20180094
引用本文: 张妍, 刘彦琦, 宋春芳. 不同移动荷载速度下轨道结构动态响应研究[J]. 机械科学与技术, 2018, 37(12): 1841-1846. doi: 10.13433/j.cnki.1003-8728.20180094
Zhang Yan, Liu Yanqi, Song Chunfang. Study on Dynamic Responses of Track Structure under Different Moving Load Speeds[J]. Mechanical Science and Technology for Aerospace Engineering, 2018, 37(12): 1841-1846. doi: 10.13433/j.cnki.1003-8728.20180094
Citation: Zhang Yan, Liu Yanqi, Song Chunfang. Study on Dynamic Responses of Track Structure under Different Moving Load Speeds[J]. Mechanical Science and Technology for Aerospace Engineering, 2018, 37(12): 1841-1846. doi: 10.13433/j.cnki.1003-8728.20180094

不同移动荷载速度下轨道结构动态响应研究

doi: 10.13433/j.cnki.1003-8728.20180094
基金项目: 

政策引导类计划(产学研合作)-前瞻性联合研究项目 BY2016022-10

北京市自然科学基金项目 1182010

北京市科学技术研究院创新团队项目 IG201503C2

详细信息
    作者简介:

    张妍(1990-), 硕士研究生, 研究方向为机械结构动力学, 6150805016@vip.jiangnan.edu.cn

    通讯作者:

    刘彦琦, 副研究员, 硕士生导师, 博士, jdyqliu@163.com

  • 中图分类号: O327

Study on Dynamic Responses of Track Structure under Different Moving Load Speeds

  • 摘要: 基于无限周期结构在频域内响应的性质和叠加原理,推导出移动荷载作用下轨道结构上任意点的垂向振动频率响应函数,数值分析了在单个移动荷载及6节B型鼓形车编组的系列移动荷载作用下不同移动速度对轨道结构动态响应的影响。研究结果表明:钢轨动态响应共振峰出现在荷载激励频率附近。在共振区随着移动速度的增大钢轨动态响应的频谱峰值带宽逐渐增大,但荷载激励频率附近的一个窄频段内的位移响应将减小。在非共振区随着移动速度的增大,钢轨动态响应将显著增大。相对于单个移动简谐载荷,系列移动简谐载荷使钢轨动态响应的频谱峰值及峰值带宽增大;随着移动速度的增加,钢轨动态响应的频谱峰值带宽增大。
  • 图  1  移动简谐荷载作用下周期支撑梁模型

    图  2  周期轨道结构及周期单元

    图  3  周期支撑梁微分图

    图  4  系列移动简谐荷载作用下周期支撑梁模型

    图  5  不同载荷激振频率时钢轨最大振动位移

    图  6  单个移动荷载作用下轨道结构动态响应

    图  7  系列移动荷载作用下轨道结构位移频谱

    图  8  系列移动荷载作用下轨道结构位移时程

    表  1  某地铁车辆参数

    车型 轴重/t 车辆全长/m 车辆定距/m 转向架轴距/m
    动车 16.5 19.520 12.6 2.3
    拖车 14 20.354 12.6 2.3
    下载: 导出CSV
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  • 收稿日期:  2017-11-15
  • 刊出日期:  2018-12-05

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