The aim of this project is to develop methods that will reduce the need for maintenance of switches and crossings
(s&c), thereby bringing down traffic disturbances and life cycle costs. In particular, the knowledge of parameters affecting track geometry degradation caused by the settlement of ballast and soil will be increased. Product development of s&c, based on optimal use of resilient elements, and leading to lower dynamic forces and improved geometric stability, will be supported. Models of dynamic interaction between vehicle and s&c, and finite element calculations of stresses and strains in relevant s&c components and ballast/soil, will be used to predict wheel–rail contact forces and track geometry degradation. A stochastic distribution of load parameters such as amount of wear of wheel profiles and variations in train speed, axle load, and wheel–rail friction will be considered.
Chalmers, Trafikverket, Abetong, voestalpine Bahnsysteme.
The project is financed by Trafikverket via Luleå Technical University (LTU)