中南大学学报（自然科学版）Issue(1)：307-313,7.DOI:10.11817/j.issn.1672-7207.2016.01.042
动车组横风环境下的交会气动效应
Aerodynamic effect of EMU passing by each other under crosswind
摘要
Abstract
Based on unsteady N−S equation of three-dimensional and compressible viscous fluid, the transient pressure on the car surface, aerodynamic pressure and its moment were analyzed on the condition that the EMU (electric multiple units) consisting of 8 carriages interact with each other at the speed of 250 km/h under a crosswind speed of 20 m/s. The results show that by contrasting the results of wind tunnel test and moving model experiment with numerical simulation using indirect verification method, the change law of aerodynamic effect shows agreeable accordance with an error under 5%. When passing by each other under crosswind, the pressure difference of measuring points on body and tail is obvious, the measuring points on the same side of middle part shows little difference, the waveform and amplitude of pressure variation on the measure points of different longitude directions with one height are the same generally, and the measurement point on the top of body presents negative pressure. The lateral force and overturning moment of the head car are greater than those of the middle and the tail, and the later force and overturning moment of the leeward vehicle are greater than those of the upward one. With the increase of crosswind speed, the aerodynamic lateral force and overturning moment increase by the power law, which threatens the safe running of EMU greatly.关键词
动车组/横风/交会/风洞实验/动模型实验/气动效应Key words
EMU(electric multiple units)/crosswind/train-crossing/wind tunnel test/moving model experiment/aerodynamic effect分类
交通工程引用本文复制引用
刘峰,姚松,张洁,张娜..动车组横风环境下的交会气动效应[J].中南大学学报（自然科学版）,2016,(1):307-313,7.基金项目
国家自然科学基金资助项目(11372360, U1134203,51205418)；中南大学自由探索基金资助项目(2014zzts038)；中国铁路总公司科技研究开发计划项目(2014T001-A)；湖南省杰出青年基金资助项目(14JJ103)(Projects(11372360, U1134203,51205418) supported by the National Natural Science Foundation of China （11372360, U1134203,51205418）
Project(2014zzts038) supported by the Exploration and Innovation Funds for Graduate Students of Central South University （2014zzts038）
Project(2014T001-A) supported by Science and Technology Research and Development Program of China Railway Corporation （2014T001-A）
Project(14JJ103) supported by Outstanding Youth Fund of Hunan Province) （14JJ103）
