| 横风中不同行驶工况下高速列车非定常空气动力特性 |
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| 引用本文： | 杨志刚,马静,陈羽,张杰.横风中不同行驶工况下高速列车非定常空气动力特性[J].铁道学报,2010,32(2). |
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| 作者姓名： | 杨志刚 马静 陈羽 张杰 |
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| 作者单位： | 同济大学,上海地面交通工具风洞中心,上海,201804 |
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| 摘 要： | 通过三维大涡模拟(LES)数值计算方法,对横风中不同行使工况下高速列车的非定常空气动力特性进行研究。计算得到各工况下高速列车车体所受非定常空气动力的时域特性、频域特性、脉动特性,以及列车周围非定常流动结构。分析结果表明,横风中高速列车所受空气动力存在明显的非定常性。从各工况高速列车所受空气动力脉动的均方根值来看,各节车的非定常现象基本随着合成风向角的增加而增大。在高速列车所受非定常空气动力的频域特性方面,其峰值频率集中在斯托劳哈尔数0.05~0.2范围内,这一范围对应实车情况的频率为0.5 Hz~2 Hz,这与高速列车系统本身存在的一些固有振动频率接近,存在由横风引起高速列车系统共振、降低高速列车行驶安全性乃至引发高速列车脱轨倾覆的可能性。
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| 关 键 词： | 高速列车 横风 倾覆 非定常空气动力 |
The Unsteady Aerodynamic Characteristics of a High-speed Train in Different Operating Conditions under Cross Wind |
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| YANG Zhi-gang,MA Jing,CHEN Yu,ZHANG Jie.The Unsteady Aerodynamic Characteristics of a High-speed Train in Different Operating Conditions under Cross Wind[J].Journal of the China railway Society,2010,32(2). |
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| Authors: | YANG Zhi-gang MA Jing CHEN Yu ZHANG Jie |
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| Institution: | YANG Zhi-gang,MA Jing,CHEN Yu,ZHANG Jie(Shanghai Automotive Wind Tunnel Center,Tongji University,Shanghai 201804,China) |
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| Abstract: | The unsteady aerodynamic characteristics of a high speed train in different operating conditions under cross wind were studied numerically by the 3D large eddy simulation method.The characteristics of the unsteady forces acting on the train for different operating conditions were presented from the numerical results,which included the characteristics of the time domain,the frequency domain,and the pulsation.In addition,the flow structures for different conditions were also shown.The numerical results indica... |
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| Keywords: | high speed train cross wind overturning unsteady aerodynamic force |
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