Study-unit MECHANICS OF MACHINES
| Course name | Mechanical engineering |
|---|---|
| Study-unit Code | A003426 |
| Curriculum | Comune a tutti i curricula |
| Lecturer | Maria Cristina Valigi |
| Lecturers |
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| Hours |
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| CFU | 10 |
| Course Regulation | Coorte 2023 |
| Supplied | 2024/25 |
| Learning activities | Caratterizzante |
| Area | Ingegneria meccanica |
| Sector | ING-IND/13 |
| Type of study-unit | Obbligatorio (Required) |
| Type of learning activities | Attività formativa monodisciplinare |
| Language of instruction | Italian |
| Contents | Contenuti CONTENUTI Sì • Coppie cinematiche e meccanismi: strumenti analitici e grafici per lo studio cinematico e cinetostatico. • Attrito, usura. • Rendimento di macchine e meccanismi. • Ruote dentate e meccanismi per la trasmissione del moto. • Vibrazioni ad 1 gdl • Vibrazioni libere • Vibrazioni forzate • Isolamento delle vibrazioni • Vibrazioni a 2 gdl • Vibrazioni ad Ngdl • Analisi Modale • Kinematic pairs and mechanisms: graphical and analytical tools for kinematic and kinetostatic analysis. • Friction, wear. • Mechanical efficiency of machines and mechanisms. • Gears and transmission systems. • Vibrations with 1 dof • Free vibrations • Forced vibrations • Transmissibility • Suspension optimization • Reduction of vibrations generated by a vibrating ground • Vibration with 2dofs • Vibration with n dofs • Modal Analysis |
| Reference texts | Testi di riferimento TESTI_RIF Sì • Funaioli E., Maggiore A., Meneghetti U., Lezioni di Meccanica applicata alle macchine. Prima parte: Fondamenti di Meccanica delle Macchine, ed. Patron, Bologna. • Papini S., Malvezzi M., Falomi S, Esercitazioni di meccanica applicata alle macchine: 1, Ed. Esculapio • Papini S., Malvezzi M., Valigi M.C., Esercitazioni di meccanica applicata alle macchine: 2, Ed. Esculapio Callegari M., Fanghella P., Pellicano F., Meccanica applicata alle macchine, Ed. CittàStudi • Umberto Meneghetti , Alberto Maggiore , Ettore Funaioli "Lezioni di meccanica applicata alle macchine. Vol. 3: Dinamica e vibrazioni delle macchine." Pubblicato da Pàtron . • Appunti delle lezioni • Funaioli E., Maggiore A., Meneghetti U., Lezioni di Meccanica applicata alle macchine. Prima parte: Fondamenti di Meccanica delle Macchine, ed. Patron, Bologna. • Papini S., Malvezzi M., Falomi S, Esercitazioni di meccanica applicata alle macchine: 1, Ed. Esculapio • Papini S., Malvezzi M., Valigi M.C., Esercitazioni di meccanica applicata alle macchine: 2, Ed. Esculapio Callegari M., Fanghella P., Pellicano F., Meccanica applicata alle macchine, Ed. CittàStudi • Umberto Meneghetti , Alberto Maggiore , Ettore Funaioli "Lezioni di meccanica applicata alle macchine. Vol. 3: Dinamica e vibrazioni delle macchine." Pubblicato da Pàtron . • Notes |
| Educational objectives | Competence in the main methods for the functional analysis of machines and mechanisms, with particular regard to kinematic and kinetostatic problems. Knowledge of the main motion transmission mechanisms and systems, of friction and wear phenomena. Basic knowledge of dynamics and vibrations needed to describe the dynamic behavior of a mechanical system. Ability to study mechanical vibrations, the causes that determine vibrations and the effects caused by them. |
| Prerequisites | Phisics- Theoretical Mechanics |
| Teaching methods | The course is organized in frontal theoretical lessons and exercises. |
| Other information | Attending students have the possibility of examination in itinere. |
| Learning verification modality | Written and oral test. |
| Extended program | • Definition of machine, kinematic chain, and mechanism. Kinematic pairs. • Contact forces, friction, Coulomb friction, rolling friction, wear, Reye’s principle and contact pressure distribution, disc brake, clutch mechanism. • Articulated mechanisms Kinematic analysis of the slider-crank mechanism and four-bar linkage. • Cams. • Mechanical joints: Cardan joint and homokinetic joints. • Kinematic and kinetostatic analysis of mechanisms, kinetostatics of vehicles. • Mechanical efficiency of different machine configurations • Conjugate profiles and tracking methods. • Friction wheels • Spur gears with involute teeth: geometrical characteristics and dimensioning. Motion continuity and interference. Helical gears, bevel gears. • Ordinary and Epicyclic gearings. • Belt transmissions. • Oscillators • Single Degree of Freedom Systems • Free vibrations: 1 DoF • Motion of the mass: Anharmonic, damped harmonic, harmonic motion. Initial conditions • Forced vibrations: Force model. Transient and steady-state solution. Analytical solution. • Amplitude and phase with and without damping. Resonances. • Ground isolation:.Analytical solution Suspension optimization • Mass isolation:. Analytical solution Suspension optimization • Two Degrees of Freedom Systems. • . N Degrees of Freedom Systems. |
| Obiettivi Agenda 2030 per lo sviluppo sostenibile | - SDG3 - Good Health and Wellness - SDG4 - Quality Education - SDG9 - Industry, Innovation and Infrastructure - SDG12 - Responsible Consumption and Production - SDG3 - Good Health and Wellness - SDG4 - Quality Education - SDG9 - Industry, Innovation and Infrastructure - SDG12 - Responsible Consumption and Production |