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《Journal of Chongqing Institute of Technology(Natural Science)》 2009-03
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Influence of Cross-wind on Dynamic Performance of High-speed EMU on Straight Track

MA Wei-hua1,LUO Shi-hui1,SONG Rong-rong2(1.Traction Power State Key Laboratory,Southwest Jiaotong University,Chengdu 610031,China;2.College of Computer Science and Technology,Southwest University for Nationalities,Chengdu 610041,China)  
By building dynamic simulation model for high-speed EMU,this paper analyzes the running safety of EMU under the effect of aerodynamic side force,lift force and rolling moment.Taking one kind of 350km/h EMU as a prototype,a train dynamic model is built with the motor-trailer-motor arrangement.The tumbler journal box is adopted in the bogie of the vehicle and the secondary suspension system consists of air spring,lateral damper and the longitudinal damper.The influence of the mild wind(15 m/s) and the gust crosswind(25 m/s) on the EMU is researched.Simulation results show that the crosswind has a big influence not only on the wheel set lateral force,derailment coefficient but also on the wheel load decrease rate.Nearly all of the wheel load reduction rates exceed the criteria.The running speed of the EMU must decrease to avoid the derailment from the view point of wheel load reduction rate.The gust crosswind has a bigger influence than the mild wind on the EMU and the front vehicle is more influenced by the crosswind than the other vehicles.
【Fund】: 国家“973”重点基础基金资助项目(2007CB714700);; 国家自然科学基金资助项目(50775191);; 国家重点实验室自主研究课题资助项目(2008TPL-T03);; 西南交通大学青年教师科研起步基金资助项目(2008Q060)
【CateGory Index】: U266
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