AIMS AND LEARNING OUTCOMES

The course aims at providing the theoretical and applicative knowledge about the main components of of mechanical systems.

At the end of the course, the student will be able to:

• select transmission components and mechanisms on the basis of the considered application
• select these components starting from given requirements
• select typology and perform geometrical synthesis of articulated systems and cams
• evaluate the vibrational behaviour of simple mechanical systems

TEACHING METHODS

The course is organised with theoretical lessons and presentations of exercise and case studies.

SYLLABUS/CONTENT

Mechanics of kinematic pairs: rolling and sliding bearings; basics of hydrodynamic and hydrostatic bearings. Gear wheels: definitions, geometry; modular gears; coupling and force transmission; helical gears; gears for transmission between nonparallel axes. Power transmissions: ordinary and epicyclical gears; gear efficiency. Transmissions with chains and belts. Rope transmissions. Variators, joints, clutches, brakes. Mechanisms for general motion: motion laws, articulated systems, cams, other mechanisms. Introduction to fluid transmissions. Mechanical vibrations; natural vibrations; structural properties; forced vibrations; frequency response; force transmission. Basics of rotor dynamics; static and dynamic imbalance.

RECOMMENDED READING/BIBLIOGRAPHY

• Callegari Massimo, Fanghella Pietro, Pellicano Francesco, MECCANICA APPLICATA ALLE MACCHINE, Città Studi, 2013, ISBN 9788825173819