横风作用下高速列车转向架非定常空气动力特性
Aerodynamic force/moment for high-speed train bogie in crosswind field
查看参考文献17篇
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文摘
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针对CRH型动车组的真实外形,采用分离涡数值计算方法,对横风中高速列车转向架的非定常空气动力特性进行研究。得到各个转向架气动荷载的时域特性、频域特性以及转向架周围非定常流动结构。研究结果表明,横风中高速列车转向架处流场非常紊乱,伴生出许多分离涡;转向架所受的空气动力存在非常明显的非定常性;各个转向架空气动力的功率谱密度存在明显峰值,若转向架或转向架中某些弹性体的固有频率与它们耦合,则易出现共振进而失稳的情况。本研究可以为高速列车局部减阻优化设计和提高高速列车自身的抗风性能设计提供参考。 |
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其他语种文摘
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For the real configuration of CRH with bogies and pantograph running in crosswind, the unsteady aerodynamic characteristics of bogies were studied numerically by the 3D detached-eddy simulation method. The characteristics of the unsteady forces acting on the bogies were presented from the numerical results, which included the characteristics of the time domain and the frequency domain, and the flow structures. The numerical results indicate that the aerodynamic forces on the bogies have strong unsteady characteristics. The unsteady aerodynamic forces have obvious peaks in their frequency domain. If the modal frequency range of bogies interconnected with this frequency, the bogies as a dynamical system will be resonated by the unsteady aerodynamic forces due to the crosswind and the resonance can lead to reducing of the operating safety of the train, and even lead to overturning of the train. The results are helpful to local drag-reduced optimization and train wind resistance design. |
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来源
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中南大学学报. 自然科学版
,2014,45(5):1705-1715 【核心库】
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关键词
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转向架
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横风
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功率谱密度
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非定常空气动力
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高速列车
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地址
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1.
北京交通大学土木建筑工程学院, 北京, 100044
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中国科学院力学研究所, 北京, 100190
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1672-7207 |
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学科
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铁路运输 |
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基金
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国家自然科学基金资助项目
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国家“十一五”科技支撑计划重大项目
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中国博士后科学基金
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文献收藏号
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CSCD:5177575
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17
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