Feasibility study and optimization of lightweight, highly recyclable fairings for high-speed trains

The aim of this thesis is to explore the possibility of applications of Friction Stir Welding technology for the junction of the components of fairings for high-speed trains. The ultimate goal is then to realize a fairing design for AS 300 trains. This work was carried out at the Alstom site in Savigliano with the collaboration of the mechanical integration team. The two main problems that arise with the current types of fairing designs used in the company are the non-recyclability of some parts like composites and the necessity to ameliorate the exterior appearance of the train to meet the requests of the clients and aerodynamics. One of the main goals is to find a way to replace the rivets that can be seen from the outside of the vehicle and also to reduce the total weight of the installations. A solution was found in the introduction of Friction Steer Welding technology to have a selfsupported, centring-free fairing. This work is composed by a first part of research about existing solutions and technology, and a following part consisting in design and structural analysis.