The Influence of Track Structure Parameters on the Dynamic Response Sensitivity of Heavy Haul Train-LVT System

Background: In order to study the applicability of Low Vibration Track (LVT) in heavy-haul railway tunnels, this paper carried out research on dynamic effects LVT wheels and rails provided a technical reference for structural design track structures. Methods: Based system dynamics response sensitivity vehicle-track coupling dynamics, stability upper train, deformation tendency, under influence random irregularity different structure parameters were calculated, compared analyzed. Results: Larger under-rail lateral vertical stiffness can reduce rail system. The block should be set within reasonable range achieve purpose reducing system, beyond certain range, will increase significantly, which affect safety train operation. Conclusions: Considering changes vehicle body coefficients, change control indexes performance coefficients change, recommended values rail, block, are, respectively 160 kN/mm, 200 100 kN/mm.