Wear and fatigue of wheels have a great effect on the maintenance railway vehicles running safety. In case an urban where no rail lubrication system is installed, it reported that risk wheel damage high in curved sections. present study, we intended to method designing profile city trains can minimize wear sections, using multi-objective optimization method. optimization, explored design reduce...

The track smoothness of high-speed railroads is severely limited to ensure train performance. concrete continuous girder bridge deformed influence the decks and caused by creep bulge. There a need research impact beam on dynamical response operation safety. This paper used Midas software calculate long-term deformation large-span prestressed bridges under shrinkage. train-bridge coupled system ...

Since the wear of front-rod bearings railroad switches induce switch failure, evaluation is indispensable. On other hand, various parts are adjusted so as to avoid derailment. For example, attachment position adjustment nut adjuster rod could enlarge contact force between tongue rail and stock rail. The extension front also used eliminate gap toe In this paper, bearing during switching operatio...

Sudden changes in the aerodynamic loads acting on trains can result derailment or overturning. The impacts of infrastructure scenarios performance are significant. When high-speed travel from one scenario to another one, and flow field will change suddenly. It is a commonly western China for HSTs exit tunnel with crosswinds. In order investigate evolution, three-dimensional, compressible, unste...

Abstract A method for analysing the vehicle–bridge interaction system with enhanced objectivity is proposed in paper, which considers time-variant and random characteristics allows finding power spectral densities (PSDs) of responses directly from PSD track irregularity. The pseudo-excitation adopted framework, where vehicle modelled as a rigid body bridge using finite element method. vertical ...