Abstract：Research purpose ： The vehicle was modeled by multiple rigid bodies，the bridge was modeled by spatial beam elements，vehicles and bridge were taken as an interactive system，then the equation of the bridge - light rail train - vehicle system was established and the corresponding program was compiled. As an example， the coupling vibration responses of long - span cable - stayed bridge - light rail train - vehicle system were analyzed by using dynamic time - history analytic method， and the interactive influence of light rail trains and vehicles on long - span cable - stayed bridges was discussed. Research conclusions：The results show that：(1) The influence between light rail trains and vehicles is more obvious in vertical direction than in horizontal direction. (2) The rest of the vehicles have greatest impact on the vehicles，which are in middle position in the team. ( 3 ) The influence of light rail vehicles and vehicle interaction on the car body displacement response is more obvious than acceleration response，which shows that the overall stiffness of the bridges larger. (4) The obtained conclusions can provide reference for design and operation management of the same kind of bridge.
2016, Vol. 33 
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