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Risorsa bibliografica facoltativa
Scheda Riassuntiva
Anno Accademico 2019/2020
Scuola Scuola di Ingegneria Industriale e dell'Informazione
Insegnamento 051140 - RAIL VEHICLE DYNAMICS AND TRAIN-TRACK INTERACTION
Docente Bruni Stefano
Cfu 6.00 Tipo insegnamento Monodisciplinare

Corso di Studi Codice Piano di Studio preventivamente approvato Da (compreso) A (escluso) Insegnamento
Ing Ind - Inf (Mag.)(ord. 270) - BV (483) MECHANICAL ENGINEERING - INGEGNERIA MECCANICA*AZZZZ051140 - RAIL VEHICLE DYNAMICS AND TRAIN-TRACK INTERACTION
Ing Ind - Inf (Mag.)(ord. 270) - MI (475) ELECTRICAL ENGINEERING - INGEGNERIA ELETTRICA*AZZZZ051140 - RAIL VEHICLE DYNAMICS AND TRAIN-TRACK INTERACTION

Obiettivi dell'insegnamento

Objective of the course is to is to introduce the principles of rail vehicle dynamics and of the interaction between rail vehicle and infrastructure, considering the main dynamical aspects and their influence on the damages on the main contacting elements (wheelset and rails).


Risultati di apprendimento attesi

After a positive evaluation at the exam:

1) the student will know the fundamentals of the dynamics of train vehicles and the main variables affecting the behavior of a vehicle;

2) the student will know the fundamental concepts of the contact stresses, their application to describe the cyclic stress state in rails and wheels;

3) the student will be able to use simulation packages to model the behaviour of a rail vehicle and to correctly evaluate the outputs of the simulations;

4) the student will be able to understand how the loads are transferred to the wheel-rail interface and he to apply some analytical tools for evaluating their prospective degradation.

After reaching a positive evaluation of the project work the student will be able to correctly apply the learnt techniques to simulate the dynamic behaviour of a rail vehicle, he/she is able to identify the significant parameters governing vehicle dynamics, to set-up an analysis for degradation of components with service conditions.


Argomenti trattati
  1. Rail vehicle modelling: 

1.1 Detailed rail vehicle structure

1.2 Wheel-rail contact forces: stresses and deformation of contacting bodies, definition of creepages, geometrical aspects of wheel-rail contact, models for contact forces

1.3 Modelling of suspension components.

1.4. Semi analytical models: wheelset on tangent track and curve, bogie on tangent track and curve: dynamics and steady state condition.

1.5 Numerical models: multi-body simulation of rail vehicle dynamics.

  1. Track and infrastructure modelling:

2.1 Track typologies for standard lines, high speed lines and urban and metro lines.

2.2 Modelling of the main track elements: rail, fastenings, sleeper, slab, elastomeric elements.

2.3 Train-track-structure interaction: time domain and frequency domain models for train-track and train-bridge/tunnel interaction.

  1. Design & Damage mechanism on wheel and rail:

3.1 Design requirements for axles and wheels;

3.2 Damage and RCF on wheel and rail rolling surfaces

3.3 Service degradation, Fatigue and crack propagation in wheelset axle

3.4 Fatigue in rail welded joints.

3.5 Outcomes on maintenance: damage detection techniques, planning of checking intervals.

4. Environmental impact of railway transportation: Ground borne vibration and air borne noise: phenomenological description, relationship with the mechanical features of the vehicle and of the railway track

 


Prerequisiti

Knowledge in the dynamics of mechanical systems, structural mechanics, strength of materials and fatigue & fracture.


Modalità di valutazione

The final exam consists of an oral exam on the topics of the course and a discussion of a yearwork, in which the students will apply the tools and methods learnt during the course. 


Bibliografia
Risorsa bibliografica obbligatoriaKnothe Klaus, Stichel Sebastian, Rail Vehicle Dynamics , Editore: Springer, Anno edizione: 2017, ISBN: 978-3-319-45374-3
Risorsa bibliografica obbligatoriaSimon Iwnicki (ed.), Handbook of Railway Vehicle Dynamics, Editore: CRC Press, Anno edizione: 2006, ISBN: 9780849333217 http://www.crcnetbase.com/isbn/9781420004892
Risorsa bibliografica obbligatoriaAhmed A. Shabana, Khaled E. Zaazaa, Hiroyuki Sugiyama, Railroad Vehicle Dynamics: A Computational Approach, Editore: CRC Press, ISBN: 9781420045819 http://www.crcnetbase.com/isbn/9781420045857
Risorsa bibliografica facoltativaFederico Cheli and Giorgio Diana, Advanced Dynamics of Mechanical Systems, Editore: Springer International Publishing, Anno edizione: 2015, ISBN: 978-3-319-18199-8

Software utilizzato
Nessun software richiesto

Forme didattiche
Tipo Forma Didattica Ore di attività svolte in aula
(hh:mm)
Ore di studio autonome
(hh:mm)
Lezione
36:00
54:00
Esercitazione
9:00
13:30
Laboratorio Informatico
15:00
22:30
Laboratorio Sperimentale
0:00
0:00
Laboratorio Di Progetto
0:00
0:00
Totale 60:00 90:00

Informazioni in lingua inglese a supporto dell'internazionalizzazione
Insegnamento erogato in lingua Inglese
Disponibilità di materiale didattico/slides in lingua inglese
Disponibilità di libri di testo/bibliografia in lingua inglese
Possibilità di sostenere l'esame in lingua inglese
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schedaincarico v. 1.6.8 / 1.6.8
Area Servizi ICT
22/09/2021