A Parameterized Three-Dimensional Finite Element Model of a Slab Track for Simulation of Dynamic Vehicle–Track Interaction

Examensarbete för masterexamen

Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12380/254922
Download file(s):
File Description SizeFormat 
254922.pdfFulltext1.94 MBAdobe PDFView/Open
Type: Examensarbete för masterexamen
Master Thesis
Title: A Parameterized Three-Dimensional Finite Element Model of a Slab Track for Simulation of Dynamic Vehicle–Track Interaction
Authors: Sved, Niklas
Abstract: To meet the increased demands of freight and people transport by trains, the Swedish Transport Administration is evaluating the possibility of constructing new railways based on slab track design. In this work, models of a slab track have been developed in two and three spatial dimensions. The models were created by writing scripts in the programming language Python and by generating models in the commercial software ABAQUS. The models were subsequently used in dynamic vehicle–track interaction simulations in the in-house software DIFF. The two-dimensional slab track model consists of Rayleigh–Timoshenko beam elements, while the three-dimensional slab track model combines Rayleigh–Timoshenko beams and solid elements. All track parameters, geometries, materials and the foundation stiffness distribution are modifiable such that parametric studies can be conducted. Track models developed within the current project have been validated against an existing two-dimensional track model, in terms of receptance, track stiffness at the rail level and wheel–rail contact force. These numerical results give an indication if the assumptions for the existing two-dimensional model are valid, they also offer an opportunity to fine-tune said existing two-dimensional model according to a more detailed three-dimensional model in future work. The results in the current work indicate that the three-dimensional model is slightly stiffer. However, by tuning the design parameters, a similar track stiffness at the rail level can be achieved. Keywords: Vehicle–track interaction; Slab track; Ballastless track; Modeling; ABAQUS scripting.
Keywords: Transport;Teknisk mekanik;Transport;Applied Mechanics
Issue Date: 2018
Publisher: Chalmers tekniska högskola / Institutionen för mekanik och maritima vetenskaper
Chalmers University of Technology / Department of Mechanics and Maritime Sciences
Series/Report no.: Master's thesis - Department of Mechanics and Maritime Sciences : 2018:01
URI: https://hdl.handle.net/20.500.12380/254922
Collection:Examensarbeten för masterexamen // Master Theses



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.