30t Axle Load Heavy Haul Railway Mechanical Properties Of Ballastless Track Structure Analysis

30tons of axle load on the roadbed slab track overloaded railway freight train operation feasibility analysis of overloaded railway roadbed is established on the space of the vehicle-track-roadbed dynamic and static analysis model, from the two aspects of statics and dynamics of the interaction between vehicle and track and roadbed mechanics characteristic has carried on the feasibility study, the main work is as follows:(1) Statics model orbit-embankment is established, the type of a steel rail was analyzed, the track plate size, elastic modulus, size, elastic modulus of concrete base surface and subgrade stiffness change of the track structure statics characteristic. Of the selection of rail, rail base plate and concrete size and modulus of elasticity, the subgrade surface stiffness value of parameters such as the rationalization proposal.(2) Respectively introduces the vehicle vibration matrix equation, slab track subgrade vibration equation of wheel/rail relationship handle problems and overloaded railway track irregularity incentive mechanism, using elastic potential energy principle and ", reserved seats " the same established "vehicle-track-subgrade" spatial coupling dynamic model, and verified the program.(3) Through "vehicle-track-subgrade" spatial coupling dynamic model of the track irregularity, the speed change, fastener stiffness, the CA mortar stiffness changes, and analysed on the subgrade surface rigidity and dynamic characteristics of vehicle structure, and to provide the reference value of track structure parameters.