Simulation Of High-speed Maglev Train Collision Process

High-speed maglev train is very competitive in non-contact-ground rail transport in the 21st century. Once a collision accident happened, it would cause serious consequences.In order to ensure driving safety and reduce threat to passengers and property as much as possible, it is necessary to study high-speed maglev train body deformation and motion law while impacting.Taking single car body as the research object, based on the incremental approach theory of hourglass viscous damping control zero-energy mode, using the dynamic explicit finite element software LS-DYNA,the three-dimensional finite element models of the end car and the middle car were established in detail to study the collision behavior while impacting the fixed rigid wall at different speeds to get the impact force, displacement, deformation energy and so on.According to the single-car impact characteristics, taking entire train as the research object, based on multi-rigid-body and finite element hybrid algorithm theory, multi-car coupling collision one-dimensional model of high-speed magnetic train was given.Using MATLAB software platform, multi-car coupling collision numerical simulation program of high-speed maglev train was compiled. By analyzing dynamic mechanical behavior of high-speed maglev train in the three crash scenes, the relationship between the impact force, deformation length, deformation energy and time of every car body structure in different crash scene was obtained.Based on the work above, the collision processes of high-speed maglev train in different impact characteristics match modes are studied and the results indicate that it is needed to improve rigidity of the existing end car while also reducing rigidity of the middle car to minish the longitudinal rigidity between adjacent cars as far as possible for avoiding deformation concentration phenomena of car structure.