B5866 - TERRAMECHANICS FOR OFF HIGHWAY VEHICLES

Conoscenze e abilità da conseguire

Lo studente acquisirà una conoscenza approfondita della dinamica dei veicoli off-highway in relazione all’ambiente operativo, il terreno. Lo studente imparerà le basi della meccanica del suolo e della sua caratterizzazione, la modellazione della sua interazione con i veicoli e le macchine agricole. Inoltre, lo studente imparerà a utilizzare questi modelli per predire le prestazioni di trazione e mobilità dei veicoli off-highway e l'influenza dei parametri progettuali del veicolo su queste prestazioni, nonché a selezionare una configurazione del veicolo appropriata per un determinato veicolo, ambiente e operazione. Gli studenti impareranno anche a pianificare e a condurre misure di prova sul campo e ad analizzare statisticamente i sperimentali per la caratterizzazione della missione.

Contenuti

Overview about the course and terramechanics (2 hours / 0.2 CFU)

Description of off-highway vehicles and their main missions (8 hours / 0.8 CFU)

Description of auxiliaries components of off-highway vehicles (i.e., PTO, power lift, drawbar hitch, hydraulic remotes) (8 hours / 0.8 CFU)

Soil engineering parameters and in particular: soil classification, soil shear strenght, soil pressure sinkage, soil bearing capacity (10 hours / 1 CFU)

Testing of soil engineering parameters (6 hours / 0.6 CFU)

Description of traction devices (4 hours /0.4 CFU)

Performance evaluation of tracked and wheeled off-highway vehicles (4 hours /0.4 CFU)

Mobility requirement, and description of tyres and tracks (4 hours / 0.4 CFU)

Description of power delivery efficiency and traction efficiency (4 hours / 0.4 CFU)

Full-scale vehicle test methods (4 hours / 0.4 CFU)

Modeling vehicle - ground performance: tracked vehicles, and rigid and flexible wheel on soft soils (10 hours / 1 CFU)

Stability of off-highway vehicles (2 hours / 0.2 CFU)

 

 

 

Testi/Bibliografia

Course material:

• PDF notes provided by the teacher. To aid class learning process, these notes should be printed before each lecture. These notes will be provided with Virtuale service and they will be accessible to those subscribed to the distribution list.
• Wong, J. Y. (2009). Terramechanics and off-road vehicle engineering: terrain behaviour, off-road vehicle performance and design. Butterworth-heinemann.

Metodi didattici

Lectures conducted in presence.

During the course, seminars will be planned and will be held by experts from the industry.

Modalità di verifica e valutazione dell'apprendimento

The course is a module of "Power Transmission and Terramechanics for Off-Highway Vehicles" together with the course of "Power Transmission for Off-Highway Vehicles". Consequently, the final assessment will be the average value of the assessment of each course.

The assessment is based on an oral exam where three questions will be asked. The average duration of the exam is 30 minutes.

The online exam confirmation is mandatory. The course outcome will be verbalized by Prof. Alberto Martini.

Strumenti a supporto della didattica

Lectures in class, and laboratory of water, energy and soil mechanics.

Orario di ricevimento

Consulta il sito web di Michele Mattetti