CODE 111334 ACADEMIC YEAR 2024/2025 CREDITS 6 cfu anno 2 INGEGNERIA NAVALE 8722 (L-9) - GENOVA SCIENTIFIC DISCIPLINARY SECTOR ING-IND/14 TEACHING LOCATION GENOVA SEMESTER 2° Semester TEACHING MATERIALS AULAWEB OVERVIEW Applied Mechanics and Machine Construction represent two disciplines oriented respectively to the functional and construction design of machines. The Mechanics and Construction of Machines for Naval Engineering module brings together these disciplines, orienting them to the machines present on board ships. The course aims to provide on the one hand the basic tools for the knowledge, identification and analysis of the main mechanical components that make up the machines and on the other some elements of in-depth analysis on the problems of the components themselves in the naval sector. AIMS AND CONTENT LEARNING OUTCOMES The course aims at providing students with fundamentals concepts of mechanics and construction of machinery, useful both, for the understanding of their working principles as well as for the analysis of more complex systems studied in shipbuilding and marine engineering courses AIMS AND LEARNING OUTCOMES The aim of the course is to provide basic knowledge on the problems of mechanical components from a functional and construction point of view, with particular reference to the transmitting machines used in naval systems. At the end of the course the student will have acquired basic knowledge on the functioning and construction of the main mechanical components used in the naval sector. Specifically, the student will be able to: analyze simple kinematic and dynamic analysis models evaluate the operating principles of mechanisms typical of the naval sector discuss the main elements of mechanism sizing PREREQUISITES To effectively deal with the teaching contents, the following basic knowledge is necessary: elements of mathematical analysis elements of physics elements of construction science industrial design elements TEACHING METHODS The course includes lectures and frontal exercises. SYLLABUS/CONTENT Elements of applied kinematics Elementary kinematic couples and their realization. Kinematics of articulated cranes. Movements with fixed and mobile pulleys. Rudder kinematics: Rapson's guide. Kinematics for ship maneuvering: Voith-Schneider transmission. Elements of surface mechanics Surface roughness. Phenomenology of sliding friction: static and dynamic friction factors. Wear. Phenomenology of rolling friction. Rolling bodies balance: driven and driven wheels. Elements of applied dynamics Dynamic equivalence: dynamics of a motor-gearbox-load complex. Efficiency: efficiency of mechanisms in series and parallel. Periodic regime: degree of irregularity. Sizing of a flywheel. Free motion of second order systems with one degree of freedom. Damped free vibrations. Forced vibrations. Torsional vibrations. Notes on systems with multiple degrees of freedom: torsion bi-pendulum. Functional and construction elements of mechanical components Axles and shafts: static and fatigue sizing. Sizing of tabs and keys. Bearings: Plain bearings and thrust bearings with hydrodynamic lubrication. Rolling bearings. Mention of friction wheels. Gear wheels with geometries for parallel, concurrent and skewed axes. Proportioning of gear drives. Ordinary and planetary gears. Willis formula. Elements of wheel design and verification. Use of gearboxes in the naval sector. Transmissions with hoses: Transmissions with wire ropes. Belt transmissions. Chain transmissions. Connections between rotating shafts: Joints and Grafts. Braking systems: band brakes. Welded joints: typologies, calculation of butt joints and corner seams in the static field, theory of the stub sphere. RECOMMENDED READING/BIBLIOGRAPHY Texts in consultation: N.P. Belfiore, A. Di Benedetto, E. Pennestrì, "Fondamenti di meccanica applicata alle macchine" - Ed. Casa Editrice Ambrosiana, Italy, 2024. E. Funaioli, A. Maggiore, U. Meneghetti, "Lezioni di meccanica applicata alle macchine", Patron, Italy, 2011. Ghigliazza R., Lucifredi A., Michelini R., "Lezioni di meccanica applicata alle macchine", 1974. J. Keith Nisbett, Richard G. Budynas, "Shigley - Machine design and construction", Mc Graw Hill Italy, 2024. J.J.Wicker, G.R.Pennock, J.E.Shigley, "Theory of Machines and mechanisms", Oxford University Press, 2017. Teaching material on the topics covered in class is available on AulaWeb. If necessary, additional material on specific topics is provided throughout the course. TEACHERS AND EXAM BOARD ENRICO RAVINA Ricevimento: Student reception is on Monday afternoon, upon contact via e-mail at enrico.ravina@unige.it . The reception is suspended in the month of August and on all public holiday Mondays. Exam Board ENRICO RAVINA (President) MARCO GAIOTTI CESARE MARIO RIZZO (President Substitute) LESSONS LESSONS START According to the Polytechnic School calendar Class schedule The timetable for this course is available here: Portale EasyAcademy EXAMS EXAM DESCRIPTION The exam includes a written test structured on two topics among those covered in the course. ASSESSMENT METHODS The exam questions aim to ascertain mastery of the topics covered in the course. The questions are formulated in relation to the level of depth given to the individual topic during the lessons and require an open response from the student. Exam schedule Data appello Orario Luogo Degree type Note 17/06/2025 09:00 GENOVA Scritto L'esame si svolgerà in aula A7 01/07/2025 09:00 GENOVA Scritto L'esame si svolgerà in Aula A7 15/07/2025 09:00 GENOVA Scritto L'esame si svolgerà in Aula A4 16/09/2025 09:00 GENOVA Scritto L'esame si svolgerà in Aula A7 16/09/2025 09:00 GENOVA Scritto FURTHER INFORMATION The teacher is available for detailed information and clarifications, upon contact via e-mail at enrico.ravina@unige.it.
