铁路地下直径线橡胶浮置板道床钢轨变形限值研究

Floating slab track can effectively reduce the impact of rail vibration. It can be applied to underground transit line which builds in the densely populated areas. For driving safety and comfort, it is necessary to investigate the rail deformation limit of floating slab track on railway operating conditions. Based on FEM, a vehicle- rubber floating slab track coupled dynamic model is established. The dynamic characteristics of vehicle, rail, floating slab track under the condition of SS9 train with 100 km/h speed are researched in details, and put forward the rail deformation limit suggested value of floating slab track bed through driving safety and stability. The result shows that: Track dynamic vertical displacement will be great if the stiffness of rubber pad is below 0.02N/mm3.When rail vertical deformation limit is 4mm, train operation safety and stability meet the specification requirement under the 100 km/h speed.