| With the increasing requirement and implement of high-speed and overload transportation, more and more attention has been paid on the couple dynamic response of rail vehicle and structure. On the one hand, the dynamic shock by the high-speed passing vehicle will cause the mechanical fatigue of structure. On the other hand, the vibration of the structure affects the safety and stabilization of vehicle. Therefore, it is necessary to study on the dynamic response characteristics of the vehicle and the loaded structure. Based on the 3D non-linear modeling method and the parallel computing technologies, the 3D rolling contact model of rail and wheel is set up, and the 3D dynamic numerical simulation method of rail vehicle and structure as bridge and tunnel is studied. The main contents include:The numerical modeling method of the rail vehicle and structure dynamic couple system is studied. Based on the photogrammetry theory, the geometry model of rail transportation vehicle is build. With the vertical contact of wheel tread and top surface of railhead as well as lateral contact of wheel flange and lateral surface of railhead, the mechanical model of wheel and rail is set up. Through the bucket sorting search method based on segment and bi-direction contact manner, the dynamic running simulation in the straight and curve line with 3D rolling contact model is achieved.The high performance numerical computation method of the rail vehicle and structure dynamic couple system is studied. Serial methods and normal computer are not adapted to nonlinear dynamic analysis of large and complex structure with the 3D non-linear finite element models. With the Update Lagrange Formation method and central difference algorithm, the nonlinear equation is solved. Based on the character of the vehicle-rail dynamic couple system and the structures of DAWNIING 4000A supercomputer located in Shanghai Supercomputer Center, the domain decomposition method based on the rail-wheel contact balance between vehicle and rail is proposed. Through the application in rail vehicle and bridge dynamic analysis, as well as the rail transportation vehicle and the tunnel coupling vibration analysis, the parallel computing efficiency of rail-wheel contact balance bisection (RWCBB) method and recursive coordinate bisection (RCB) method are compared. The application of the 3D wheel-rail rolling contact numerical modeling methods in vehicle and bridge couple dynamic response analysis is studied. The non-linear finite element models of light rail vehicle and cable-stayed bridge are respectively built up. The finite element model of light rail vehicle is made of the wheel-set, the bogie, and the body, which are connected with secondary suspension system. The finite element model of the cable-stayed bridge includes all structural components: bridge deck, cable, tower, piers, cap, piles, sleeper, rail and soil. Through the simulation of two moving load conditions as single direction for one train and oppose direction for two, the running safety of light rail train and dynamic response of bridge are analyzed, which provides the reference for the safety design of long span cable-stayed bridge.The dynamic response characteristic of light rail vehicle and bridge couple system under collision of ship and bridge is studied. The 3D numerical model of the ship is set up. Combine the ship-bridge collision with vehicle-bridge couple problem, the finite element model of the light rail vehicle, the cable-stayed bridge, and the ship are built as a whole system. The dynamic response of the cable-stayed bridge and the light rail vehicle under ship impact are respectively analyzed.According to transportation safety issues of the"Qingcaosha"tunnel, which being construct by Shanghai Tunnel Engineering Co. Ltd, the rail transportation vehicle and the 24Kg narrow rail structure are respectively built with 3D non-linear finite element models. The rail transportation vehicle is composed of storage battery car, the flat car and the grout transportation car, which are connected with dowels each other. In order to improve the running safety of rail transportation vehicle and decrease the probability of derailment accident, the device of absorbers is design and added to vehicle. The effect with and without absorbers in vehicle is testified.The application of the 3D wheel-rail rolling contact numerical modeling methods in vehicle and tunnel vibration analysis is studied. The finite element model of tunnel, which are made of solid, the tunnel wall and the working well, is established. The Drucker-Prager material model is applied in describing the soil, which delaminated according to the real geological and hydraulic. The dynamic response of tunnel during normal running condition and accident condition of rail transportation vehicle are respectively analyzed.
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