风屏障几何参数对桥上磁浮列车气动力的影响  

Influence of Geometric Parameters of Wind Barrier on Aerodynamic Forces of Maglev Train on Bridge

在线阅读下载全文

作  者:马凌峰 孙体佳 汪斌[1] 邓钢 李永乐[1] MA Lingfeng;SUN Tijia;WANG Bin;DENG Gang;LI Yongle(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区:[1]西南交通大学土木工程学院,成都610031

出  处:《铁道建筑》2025年第2期77-82,共6页Railway Engineering

基  金:国家自然科学基金(52278535)。

摘  要:常导高速磁浮列车外包轨道,其侧风气动力无法直接参考现有轮轨列车的气动力。风屏障是保障桥上磁浮列车高速行驶的一种重要手段,其几何参数的选定尤为重要。本文以侧风气动力为研究对象,建立常导磁浮列车-桥梁侧风气动数值分析模型,研究格栅型风屏障透风率、高度对箱形磁浮梁及桥上磁浮列车气动力的影响。结果表明:风屏障增大了磁浮桥梁的迎风面积,使得桥梁阻力系数增大;消除了迎风侧轨道与桥面板的负压区,使得桥梁升力系数减小;在风屏障的影响下,磁浮桥梁阻力系数、正风攻角升力系数、力矩系数对攻角的敏感性降低。增设风屏障后,列车附近区域风速减小,单独磁浮列车及双车布置迎风侧磁浮列车气动力系数下降明显;随着风屏障高度的增加或透风率的降低,磁浮车辆的阻力系数和升力系数持续降低。Since the normal conducted high speed maglev train packs the track,its aerodynamic forces in crosswind environment can not directly be referred to the aerodynamic force of wheel-rail train in the same environment.The wind barrier is an important means to ensure the high-speed running of maglev trains on bridges,and the selection of its geometric parameters is particularly important.In this paper,a numerical analysis model of the side air dynamics of a permanent maglev train-bridge was established to study the effects of the air permeability and height geometry parameters of the grille wind barrier on the box maglev beam and the aerodynamic force of maglev train on the bridge.The results show that the wind barrier increases the windward area of the maglev bridge,increases the drag coefficient of the bridge,eliminates the negative pressure zone of the track and bridge panel on the windward side,and reduces the lift coefficient of the bridge.The sensitivity of drag coefficient,lift coefficient and moment coefficient to attack angle of maglev bridge decreases.The wind speed in the area near the train decreases,and the aerodynamic coefficient of the single maglev train and two maglev trains on the windward side decreases obviously.With the increase of wind barrier height or the decrease of air permeability,the drag coefficient and lift coefficient of maglev trains continue to decrease.

关 键 词:桥梁工程 箱梁 风屏障 数值模拟 侧风 磁浮列车 气动特性 

分 类 号:U448.213[建筑科学—桥梁与隧道工程] V211.3[交通运输工程—道路与铁道工程]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象