Mechanical behavior and strong oriented design of multi-guide anti-creep energy absorption structure at locomotive end

When trains collide, it is difficult to have a full frontal collision. If the anti creeper fails to play a good guiding function, the train is very likely to climb or derail. In order to study the mechanical behavior of multi-guide anti-creep energy absorption device at locomotive end under eccentric load collision condition. Firstly, the anti-creep principle of the anti-creep device is analyzed, the expression of impedance force/moment of the anti-creep energy absorption device considering the influence of large plastic deformation and dynamic factors is derived. And then, the finite element model of multi-guide anti-creep energy absorption structure of locomotive end is established and verified by experiments. Through the verified finite element model, we simulated and studied the collision performance of the anti-creep energy absorption structure at vertical offset (0 similar to 100) mm and horizontal offset (0 similar to 400) mm. The result shows that the vertical migration has little effect on the stability and energy absorption of the anti-creep device. However, horizontal migration has a great influence on it. Based on the situation of horizontal instability, we optimize the strength of the deformation prone area of the anti-creep guide structure according to the bending strength. Compared with the original structure, the improved structure has better anti-creep and energy absorption performance. When the horizontal deviation is 400 mm, the energy absorption of the anti-creep device is increased by 35.50% and the platform force is increased by 16.83% compared with the original structure.