A Parameterized Turnout Model for Simulation of Dynamic Vehicle-Turnout Interaction with an Application to Crossing Geometry Assessment
Paper i proceeding, 2020

This paper presents a parameterized structural track model for the simulation of dynamic vehicle-turnout interaction in a multi body simulation environment. The model is demonstrated by performing simulations for different vehicle speeds, crossing geometries and fixations between crossing rail and sleepers with different stiffness. Results are presented for dynamic wheel-rail contact forces, bending moments in crossing rail and sleepers and sleeper-ballast contact pressure. The main conclusions are that (a) the peak dynamic bending moment in the sleeper under the crossing transition is significantly higher with a stiff direct fixing compared to a softer indirect fixing and (b) the structural loading in terms of bending moment in the crossing rail, bending moment in the underlaying sleeper and sleeper-ballast contact pressure increases proportionally and significantly with increased impact angle and vehicle speed for wheels passing over the crossing transition.


Multi body dynamics

Track model


Structural loading


Björn Pålsson

Chalmers, Mekanik och maritima vetenskaper, Dynamik

Lecture Notes in Mechanical Engineering

21954356 (ISSN) 21954364 (eISSN)


26th Symposium of the International Association of Vehicle System Dynamics, IAVSD 2019
Gothenburg, Sweden,



Teknisk mekanik




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