Study on Simulation of Impaction to High-Speed Train Windscreen

With the rapid development of high-speed train,especially the increase of the train speed,more and more attention are paid into the resistance to the impact of the front windshield, which is made of glasses and resin by compling. And in the past, most researches depend on experiments. Recently, the rapid improvement of computers’performance and SPH compling method have made it possible to simulate the impact strength of the front windshield.Based on the experiment data, HYPERMESH, a powerful pre-processing business software is used to describe the simulation model, which is made up of the SPH and Lagrangian coupling unit. In this paper, LS-DYNA, a non-linear dynamic explicit finite element analysis software, is also used in this paper to study the process. In this process, a glass with special structure is impacted by an aluminum which is weighed 1 kg and with the speed of 600 km. We all know that the glass is a typical brittle material. Thus the flying debris is inevitable, which is beyond the touch of ordinary finite element analysis software. So the smooth particle hydrodynamics method and the finite element method are coupled in calculation. That is to say, the SPH simulation is used to describe the outer layer of glass, the FEM with unshared node is used to describe the inner layer of glass, and ordinarey FEM is used to describe other layers.To sum up, the destruction process of the pre-stall glass and the deformation of PET materials are basically consistent with experimental, according to simulation results. That is to say, it is viable to use SPH and FEM coupling method to simulate and analyze the destruction of the phenomenon of the front windshield of high-speed train.