许少鹏,詹晏辉,何旭辉,邹云峰,蔡陈之,艾宗良,彭福兵

• 1:中南大学土木工程学院
• 2:轨道交通工程结构防灾减灾湖南省重点实验室
• 3:中铁二院工程集团有限责任公司土木建筑研究二院

摘要(Abstract)：

针对速度400 km/h高速列车在横风下气动荷载激增与稳定性下降的问题，提出一种基于叶片导流的旋叶型风屏障，以克服传统风屏障被动挡风效率不足的局限。基于计算流体力学(CFD)建立列车-桥梁-旋叶型风屏障三维数值模型，分析横风下旋叶型导流叶片数量与旋转角度对高速列车气动特性的影响机制，并与传统栅栏型和格栅型风屏障进行对比验证。研究结果表明：叶片数量的增加可增强风屏障的遮蔽与导流效应，显著抑制列车气动力波动；叶片旋转方向决定了流场偏转路径，顺时针旋转产生的上洗气流能有效地将横风导向列车顶部，避免了逆时针旋转引发的底部流速加速现象；综合确定4叶片且旋转角度为15°的旋叶型风屏障为最优参数，其中头车侧向力系数较栅栏型、格栅型风屏障分别降低9.4%、9.5%,倾覆力矩系数变化幅值分别降低7.8%、13.1%;流场机理分析发现最优参数下的旋叶型风屏障能有效抑制大尺度旋涡的生成，优化列车周围流场结构，形成更为稳定的低速尾流区。研究结果可为速度400 km/h高速列车抗风安全和风屏障选型提供参考。

关键词(KeyWords)： 横风;高速列车;旋叶型风屏障;CFD数值模拟;气动力

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52378546);; 湖南省自然科学基金(2024JJ4065);; 长沙市科技计划(kq2306013);; 中国中铁股份有限公司科技研究开发计划(2022-重点-07)

作者(Author): 许少鹏,詹晏辉,何旭辉,邹云峰,蔡陈之,艾宗良,彭福兵

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