1. Analytical models of LRS behavior

To approach a study of welded long rail (CWR) systems and the problem of rail-structure interaction (RSI), it is first necessary to return to classical questions of track mechanics, so as to be able to apprehend interaction models under thermal loading or any other loading.

Running track" refers to the system of rails, sleepers and fasteners, laid directly or via ballast, with no special zones such as switches, changes in rail cross-section, changes in shunting, engineering structures or tunnels, etc. It is the most common part of the railway. This is the most common part of the railroad.