Unit MECHANICS OF MACHINES
- Course
- Mechanical engineering
- Study-unit Code
- 70367210
- Curriculum
- In all curricula
- Teacher
- Maria Cristina Valigi
- CFU
- 10
- Course Regulation
- Coorte 2022
- Offered
- 2023/24
- Type of study-unit
- Obbligatorio (Required)
- Type of learning activities
- Attività formativa integrata
APPLIED MECHANICS
| Code | 70153005 |
|---|---|
| CFU | 5 |
| Teacher | Maria Cristina Valigi |
| Teachers |
|
| Hours |
|
| Learning activities | Caratterizzante |
| Area | Ingegneria meccanica |
| Academic discipline | ING-IND/13 |
| Type of study-unit | Obbligatorio (Required) |
| Language of instruction | Italian |
| Contents | • 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. |
| Reference texts | 1) Funaioli E., Maggiore A., Meneghetti U., Lezioni di Meccanica applicata alle macchine. Prima parte: Fondamenti di Meccanica delle Macchine, ed. Patron, Bologna. 2) Papini S., Malvezzi M., Falomi S, Esercitazioni di meccanica applicata alle macchine: 1, Ed. Esculapio 3) Papini S., Malvezzi M., Valigi M.C., Esercitazioni di meccanica applicata alle macchine: 2, Ed. Esculapio 4) Callegari M., Fanghella P., Pellicano F., Meccanica applicata alle macchine, Ed. CittàStudi 5) Lecture 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. |
| Prerequisites | Rational Mechanics exam, as well as good knowledge of Physics I, some topics of Geometry, and vector calculus. |
| Teaching methods | The course is organized in frontal theoretical lessons and exercises. |
| Other information | Attending students have the possibility of partial ongoing tests. |
| 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. |
MECHANICAL VIBRATIONS
| Code | 70153105 |
|---|---|
| CFU | 5 |
| Teacher | Maria Cristina Valigi |
| Teachers |
|
| Hours |
|
| Learning activities | Caratterizzante |
| Area | Ingegneria meccanica |
| Academic discipline | ING-IND/13 |
| Type of study-unit | Obbligatorio (Required) |
| Language of instruction | Italian |
| Contents | • 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 | • Umberto Meneghetti , Alberto Maggiore , Ettore Funaioli "Lezioni di meccanica applicata alle macchine. Vol. 3: Dinamica e vibrazioni delle macchine." Pubblicato da Pàtron . • S.Papini,M.Malvezzi,M.C.Valigi "Esercitazioni di meccanica applicata alle macchine: vol.2 Ed.Esculapio. • M. Callegari, P. Fanghella, F. Pellicano, “Meccanica applicata alle macchine”, ed. Città Studi. |
| Educational objectives | 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 | Physics-Theoretical mechanics |
| Teaching methods | Face-to-face theoretical lessons and exercises |
| Other information | Attending students have the possibility of examination in itinere. |
| Learning verification modality | Written and oral test. |
| Extended program | • 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 |