|
Aims and learning outcomes
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.
Syllabus
1. Rail vehicle modelling:
1.1 Detailed rail vehicle structure
1.2 Wheel-rail contact forces: 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.
2. 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.
3. Damage mechanism on wheel and rail:
3.1 Wear and RCF on wheel and rail rolling surfaces
3.2 Fatigue and crack propagation in wheelset axle
3.3 Fatigue in rail welded joints.
3.4 Effects of environmental condition: temperature, corrosion.
3.5 Outcomes on maintenance: damage detection techniques, planning of checking intervals.
4. Environmental impact of railway transportation:
4.1 Ground borne vibration and air borne noise: phenomenological description, relationship with wheel-rail contact forces and wheel-rail dynamics.
4.2 Basic modelling approaches, measurement techniques and data analysis and processing.
Prerequisites
Knowledge in the dynamics of mechanical systems, structural mechanics and strength of materials
|
Inglese