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高速铁路隧道缓冲结构气动载荷与结构应力特性分析

王英学 高波 任文强

王英学, 高波, 任文强. 高速铁路隧道缓冲结构气动载荷与结构应力特性分析[J]. 力学学报, 2017, 49(1): 48-54. doi: 10.6052/0459-1879-16-343
引用本文: 王英学, 高波, 任文强. 高速铁路隧道缓冲结构气动载荷与结构应力特性分析[J]. 力学学报, 2017, 49(1): 48-54. doi: 10.6052/0459-1879-16-343
Wang Yingxue, Gao Bo, Ren Wenqiang. AERODYNAMIC LOAD AND STRUCTURE STRESS ANALYSIS ON HOOD OF HIGH-SPEED RAILWAY TUNNEL[J]. Chinese Journal of Theoretical and Applied Mechanics, 2017, 49(1): 48-54. doi: 10.6052/0459-1879-16-343
Citation: Wang Yingxue, Gao Bo, Ren Wenqiang. AERODYNAMIC LOAD AND STRUCTURE STRESS ANALYSIS ON HOOD OF HIGH-SPEED RAILWAY TUNNEL[J]. Chinese Journal of Theoretical and Applied Mechanics, 2017, 49(1): 48-54. doi: 10.6052/0459-1879-16-343

高速铁路隧道缓冲结构气动载荷与结构应力特性分析

doi: 10.6052/0459-1879-16-343
基金项目: 

国家“863”计划资助项目 2011AA11A103-3-3-2

详细信息
    通讯作者:

    王英学,教授,主要研究方向:隧道及地下工程.E-mail:wangyingxue@swjtu.edu.cn

  • 中图分类号: U451.3

AERODYNAMIC LOAD AND STRUCTURE STRESS ANALYSIS ON HOOD OF HIGH-SPEED RAILWAY TUNNEL

  • 摘要: 高速列车通过隧道时,会引起车隧气动效应.在隧道洞口设置缓冲结构是简便有效的应对措施之一.而缓冲结构一般设置在隧道洞口,列车通过隧道产生气动载荷对该结构的影响也不容忽视.本文采用数值方法,利用Ansys软件的workbench模拟平台,对列车通过隧道产生的气动载荷作用在顶部单开口缓冲结构上的压应力变化进行模拟.研究结果表明:气动载荷所引起的结构附加应力作用明显.当行车速度为350 km/h时,附加应力可以达到80 kPa,而缓冲结构开口周围成为气动载荷附加应力集中区.对于双线隧道,近车壁面与远车壁面的附加压应力规律一致,但近车侧应力值要大于远车侧.与压力波在隧道内的传播特性类似,气动载荷所引起的附加压应力具有往复传播特征.另外,对顶部缓冲结构开口附近出现附加应力集中的原因进行了分析,确定缓冲结构形式是引起应力集中的决定因素.以上结论对隧道洞口缓冲结构的设计及安全巡查具有一定的指导意义.

     

  • 图  1  隧道断面图

    1--隧道中线,2--线路中线,3--安全空间,4--救援通道,5--内轨顶面

    Figure  1.  Tunnel cross-section

    1--tunnel central line,2--rail trak centerline,3--safety space,4--rescue channel,5--the top of inner rail

    图  2  列车模型网格图

    Figure  2.  Numeral model grid mesh of the train

    图  3  计算模型尺寸布置示意图(单位:m)

    Figure  3.  Numeral simulation model dimension (unit:m)

    图  4  流场分析中的隧道缓冲结构网格

    Figure  4.  Tunnel hood grid mesh of fluent model

    图  5  隧道缓冲结构开口尺寸(单位:m)

    Figure  5.  Tunnel hood opening dimension (unit:m)

    图  6  隧道缓冲结构计算网格

    Figure  6.  Tunnel hood grid mesh of structure model

    图  7  列车进入隧道引起的压力场和缓冲结构应力场云图 ($t=1.0$ s,单位:Pa)

    Figure  7.  Pressure and stress contour graphics induced by train entering tunnel hood ($t=1.0$ s,unit: Pa)

    图  8  缓冲结构拱顶中心线附加压应力变化时程曲线

    Figure  8.  Extra-pressure stress-time relative graphics on top zone of hood

    图  9  缓冲结构侧壁压应力变化时程曲线

    Figure  9.  History curves of extra-pressure stress on the side zone of hood

    图  10  缓冲结构壁面首个附加压应力峰值与距洞口距离相关曲线

    Figure  10.  The correlation curves between the first peak of extra-pressure stress and the distance to hood entrance

    表  1  缓冲结构力学参数

    Table  1.   Tunnel hood structure mechanics parameter

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出版历程
  • 收稿日期:  2016-11-25
  • 修回日期:  2016-11-28
  • 网络出版日期:  2016-12-02
  • 刊出日期:  2017-01-18

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