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By using numerical calculation method, 2-car high-speed train going through the station or intersecting at the station at the different speed was simulated. The bow lift change, influence of pantograph state and barrier door on pantograph lift change was researched. Results indicate that, during the train coming into the platform or going out of it, the fluctuation of pantograph lift is significant. When the train going through the platform, lift change of pantograph bow and upper frame is the biggest. There is a linear relationship between pantograph bow and the power of speed, and the law is not changed by pantograph state. Lift change of pantograph bow in the state of adverse pantograph is greater than it in the state of favorable pantograph, and influence of barrier door on the pantograph lift change is limited. When two trains are passing each other through the platform, distribution of lift change of pantograph components and law of lift change with train speed are changed significantly by pantograph state. Influence of barrier door on the pantograph lift change is more obvious than one of the train going through platform. The meeting position in the station has no effect on the lift change of pantograph. Lift change of pantograph is affected obviously by non-uniformity of train passing. [ABSTRACT FROM AUTHOR]

Aerodynamic noise of high-speed train connection section with different parameters were simulated numerically adopting LES model companied with acoustic analogy and reduction improvement project was proposed. The aerodynamic noise distribution of high-speed train connection section at speed of 300km/h was obtained from the research, the results show that aerodynamic noise is a kind of wide frequency noise which exits in wide frequency band. The acoustic pressure amplitude of every test point is bigger at low frequency, increasing firstly then decreasing with the increase of frequency, and acoustic pressure level within 1/3 octave band frequency concentrates in the rage of 315~1000Hz; Among different parameters of train connection section, the acoustic pressure level amplitude increases with the increase of groove length and height; Compared with the project without windshield, the noise reduction effect of full windshield project is apparent, avoiding severe disturbance flow effectively, the average acoustic pressure level reductive amplitude is 9.4% and the average total acoustic pressure level reductive amplitude is 4.27dBA. All these researches provide scientific foundation to the initial design of high-speed train with low noise. [ABSTRACT FROM AUTHOR]