Reduced-order modeling of train-curved-slab-track dynamics with the effects of fastening failures

Fastening failures have frequently been found on China high-speed railway curved tracks in recent years. Thus the influence of fastening train-track interaction track needs to be analyzed. A train-curved slab model is built, which real shape rail considered and modeled with reduced beam (RBM) theory, slabs are four-nodes Kirchhoff-Love plate elements. The present validated at first different traditional models. Then failure dynamics studied. number failed fastenings assumed occur track, types including fatigue fracture clip structure pad considered. Based calculation results, has little dynamics. But when happens its equivalent vertical stiffness damping less than one-tenth original, seriously affects train operation safety, it must prevented.