| Maglev system is a kind of new ground orbit transportation system, and it is the most competitive ability in modern high-speed passenger transportation system in the 21st century. But railway technique is very laggard in our country, so it is important for our country to actively engage in related research and development about Maglev transportation system, and then it is significant for our country to realize leaping development on our transportation system. In order to realize high-speed passenger transport, elevated guideway is applied widely in maglev railway system. But our country territory is broad, and earthquake often takes place. Therefore it is very necessary to research on the earthquake-excited vibration of a maglev vehicle bridge vertical couple system. In this paper, a high-speed maglev vehicle-bridge dynamic interaction model is established, based on the configuration of German Transrapid high-speed maglev system. Seismic responses of maglev vehicle-bridge system is simulated by the Newmark Twice Iteration emluator for different vehicle velocity and bridge span, The effects of a maglev vehicle-bridge vertical coupling dynamics are researched on earthquake for different vehicle velocity and bridge span, and several significative results and conclusions are obtained: â‘ Seismic acceleration of vehicle can not satisfy with limit 0.5 , but it is less than the vehicle vertical acceleration limit1.23 of the Inter City Express. m/ s2m/ s2â‘¡When span is less than 20m, the mid-guideway maximum acceleration increases gradually while span increases. When span is larger than 24m, it decreases gradually while span increases. When span is between 20m and 24m, it is greater relatively. Otherwise, the mid-guideway displacement increases gradually while span increases, but it is less. â‘¢The effect of the earthquake-excited vehicle maximum acceleration of a maglev system and the mid-guideway maximum acceleration is not obvious for...
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