Corso di laurea - Area di Ingegneria - Accesso libero con prova di verifica obbligatoria delle conoscenze richieste per l'ammissione al corso. L'esito della prova non preclude la possibilità di immatricolarsi - Classe L-9
Informazioni generali:
Descrizione e obiettivi formativi:
Il corso intende formare un profilo di ingegnere con specifiche competenze nei settori della progettazione dei sistemi meccanici, degli impianti industriali, delle macchine, delle tecnologie e dei materiali.
Partendo con l'acquisizione di conoscenze di base per la matematica, la fisica e la chimica, l'articolazione del piano di studi ne prevede lo sviluppo modellistico e metodologico fino alla loro articolazione progettuale in corsi a carattere specialistico. Gli aspetti metodologico-operativi delle scienze di base vengono acquisiti negli insegnamenti relativi ed utilizzati nel seguito per la descrizione e la soluzione di problemi tipici dell'ingegneria. Particolarmente rilevante in tale percorso lo studio e la risoluzione di problemi ingegneristici mediante un approccio metodologico caratteristico dell'ingegneria, basato sull'analisi del problema, la pianificazione di una sperimentazione o di una analisi numerica, l’analisi dei risultati e del loro impatto nel contesto sociale e fisico-ambientale.
Negli insegnamenti più specialistici vengono trattati aspetti progettuali tipici dell'ingegneria meccanica mettendo in evidenza anche gli aspetti organizzativo-gestionali e quelli etici e professionali. La capacità di comunicare efficacemente in modo scritto e orale viene acquisita durante l'intero percorso formativo attraverso elaborati, verifiche in itinere, esami orali e la stesura della tesi di laurea. Il percorso formativo prevede l'utilizzo in numerosi corsi di testi specialistici e pubblicazioni scientifiche in lingua inglese che migliorano la capacità comunicativa anche in contesti scientifici internazionali.
Al termine del percorso, lo studente sa: impostare e condurre esperimenti, analizzandone ed interpretandone i dati; comprendere l'impatto delle soluzioni ingegneristiche nel contesto sociale e fisico-ambientale; riconoscere le responsabilità professionali ed etiche ed i contesti aziendali e contemporanei in cui potrebbe operare; avere capacità relazionali e decisionali; comunicare efficacemente in modo scritto e orale, anche in un contesto internazionale; utilizzare gli strumenti cognitivi di base per un aggiornamento continuo delle proprie conoscenze ed essere capace di apprendere attraverso lo studio individuale.
Sbocchi professionali:
Gli ambiti professionali tipici per i laureati sono quelli della progettazione di prodotti e processi, della produzione, della gestione ed organizzazione, dell'assistenza, delle strutture tecnico-commerciali, sia nella libera professione che nelle imprese manifatturiere o di servizi e nelle amministrazioni pubbliche. Tra i compiti particolarmente in linea con gli obiettivi formativi, la progettazione di sistemi meccanici e termomeccanici, la progettazione e realizzazione di processi produttivi e di impianti industriali; la direzione e conduzione dei processi produttivi; la gestione e controllo degli impianti; lo sviluppo e gestione dell'innovazione.
Condizione occupazionale (indicatori di efficacia e livello di soddisfazione dei laureandi):
http://statistiche.almalaurea.it/universita/statistiche/trasparenza?CODICIONE=0580206200900007
Valutazione della didattica - Studenti
Anno accademico precedente
Riferimenti web e contatti:
Sito web http://ingegneriameccanica.uniroma2.it/
Coordinatore: Prof. Stefano Cordiner
E-mail: cordiner@uniroma2.it
Segreteria didattica:
Sig.ra Anna Mezzanotte
Tel: 06 7259 7156
E-mail: anna.mezzanotte@uniroma2.it
Thermodynamics Basic concepts: the International System (SI) of units and the thermodynamics system. Temperature and the zeroth law of thermodynamics. The first law of thermodynamics in closed and open systems. Entropy and second law of thermodynamics. Technical systems in thermodynamics: closed system (heat engines, refrigerators and heat pumps) and open systems (compressor, turbine, valve, mixture chamber, heat exchanger, pipe and duct flow). Properties of substances: ideal gas, phase change process, moist air properties and psychrometric diagram. The gas power cycles. The vapor power cycles. The refrigeration cycles. Thermofluid dynamics The mass conservation law. The energy conservation: the generalized Bernoulli equation. Incompressible flow in pipes: laminar and turbulent flows, Reynolds experience, head losses. Heat Transfer Basic mechanisms of heat transfer: fundamental laws, units and dimensions. Electrical analogy. Steady and transient conduction. Heat transfer by radiation: thermal radiation and black body. Convection heat transfer: the physical mechanism. Boundary layer fundamentals. Evaluation of heat transfer coefficient. Dimensional analysis: Buckingham theorem and Nusselt number. Analytical solution for a flow over a flat plate. Natural and forced convection. Heat Transfer with Phase Change. Applications. Air conditioning systems. Water heating systems. Flow rate and velocity measurements: Pitot and Venturi tubes. Contact thermal resistance. Heat transfer from finned surfaces. Solar radiation. Solar panels. Heat exchanges through and with a gas. Heat exchangers.
Single-DOF Linear mechanical system. Free vibrations. Forced vibrations. Determination of the damping factor. Vibration isolation. Average power dissipation. Impulse response. Flexural critical speed. Colombian damping. Linear models with two-degrees-of-freedom. Free vibration. Forced vibrations. Hysteretic damping. Viscous damping. Multidegree of Freedom System. Using Newton’s second law to derive Equations of Motion. Free and forced vibration of undamped systems. Forced vibration of viscously damped systems. Solution of the Eigenvalue Problem. Self-excited and stability analysis. Rayleigh’s method. Holzer’s method. Jacobi’s method. Choleski decomposition. Iterative methods for calculating eigenvalues by Guyan reduction. Rotor dynamics. Method Dunkerley . The model Föppl-de-Laval. Critical Speeds. Stability analysis. Balancing of shaft drives. Torsional vibrations . The method of Holzer. Analysis of systems subjected to impact . Analysis of the spectrum of the response to the shock . Analysis of the impact on the ground. Maximum acceleration and displacement . Padding characterized by nonlinear elasticity . Relations acceleration - time . Amplification factor . Vibration Measurement and Application. Spectrum analyzers. Bandpass filter. Modal Testing. Digital signal processing. Analysis of random signals. Determination of modal data from observed picks and from Nyquist Plot. Discrete Fourier transform (DFT). The convolution theorem. Errors in DFT. Aliasing and Leakage . Continuous systems. Longitudinal vibrations of bar or rod. Equation of motion and solution. Orthogonality of the normal functions. Transverse vibrations of beams. Initial and Boundary conditions. Model Euler-Bernoulli. Free transverse vibrations . Travelling wave solution . Forced vibrations . Timoshenko model . Torsional vibrations of beams. Torsional vibration free. Forced vibrations . Variational methods. The method of Rayleigh - Ritz. Lanczos algorithm . Finite element method. Beam element subjected to axial force. Local and global coordinate systems. Model of Euler - Bernoulli . Boundary conditions. Assembly of mass and stiffness matrices. Application experience in the laboratory. Finite element method in the dynamic analysis of an element of the machine. Acquisitions of signals through the use of accelerometric measurement chains. Development of the Discrete Fourier Transform. Experimental modal analysis. Acquisition of signals from impact tests.
Introduction to sensors; Circuits for resistive and capacitive sensors; Temperature sensors: thermistors, thermoelectric effects; Magnetic field sensors; Optical sensors: Photoconductors and Photodiodes; IR sensors; Mechanical sensors: position, strain gauges, accelerometers, gyroscope, pressure sensors, flow meters, micro electro mechanical systems; Intro to the Arduino and Raspberry PI Boards Using the breadboard to build simple circuits, Digital input and output, build sensor interfaces; Analogue Input and Output, PWM, Sensor calibration Building more complex circuits, interfacing with MATLAB
Programma di Gestione Dei Consumi Energetici: Introduction to Energy Management: Energy management basics. Enterprise as an Energy System. Energy Efficiency. The role of the Energy Manager. Approach to Energy management approach: Quick fixes, Energy Projects and Comprehensive Energy Management. Energy Audit: energy auditing basics, energy data collection, energy bill analysis, energy consumption analysis, electrical system audit, lighting system audit, air compressed system audit, HVAC system audit, thermal system audit, energy audit reporting, energy economics and energy projects evaluation. Energy consumption monitoring and control: defining an energy consumption measurement system, energy consumption targeting, energy consumption monitoring, energy consumption control (CUSUM chart and control chart), Energy Key performance indicators, Information system for energy management. Energy management system: basics of management system, ISO 50001 standard. Energy Service Contract.
PART I - Discrete-time signals and systems; sampling process; Discrete-time Fourier transform (DTFT); Z-transform; Discrete Fourier Series (DFS). PART II – Processing algorithms: introduction to processing; Discrete Fourier Transform (DFT); finite and long processing; DFT-based Processing; Fast Fourier Transform (FFT); processing with FFT. PART III – Filter Design: introduction to digital filters: FIR and IIR classification; structures, design and implementation of IIR and FIR filters; analysis of finite word length effects; DSP system design and applications; PART IV - Random sequences; processing of random sequences with digital filters; introduction to random sequence estimation; estimators of mean, variance and auto-covariance of random sequences with performance analysis; power spectrum estimation; periodogram and performance analysis; smoothed estimators of the power spectrum and performance analysis; use of FFT in power spectrum estimation.
Light microscopy- the light microscope, sample metallographic preparation, microstructure observation, image analysis. Electron microscopy- The scanning electron microscope. Observation of fracture surfaces and discussion of rupture mechanisms. The transmission electron microscope. Preparation of thin sheets. Observation of lattice defects. EDS microanalysis- Features and operating procedures of the instrument. Chemical spectra and maps. ZAF method for composition quantitative determination X-ray diffraction- X-ray production and interaction with matter, Bragg’s law, description of the diffractometer, determination of the crystal structure, ordered lattices and measurement of the order degree, errors in X-ray experiments, precise parameter measurements, phase diagrams determination, the JCPDS database, quantitative analysis of a poly-phasic mixture, measurement of the grain size, residual stresses and lattice defects density. Advances in instruments, computing, experiments and applications of X-rays. Mechanical Spectroscopy- Measurement of dynamic elastic modulus and damping Q-1. Tensile, hardness, micro-hardness and instrumented indentation tests.
Introduction to Manufacturing Technologies: classifications, selection criteria, and economical evaluation. Fundamentals of metals, mechanical and technological testing. Manufacturing of metals: fundamental of metal-casting, metal-casting processes and equipment, bulk forming (rolling, forging, extrusion and drawing), sheet-metal forming, fundamentals of machining, cutting-tools, machining processes (turning, drilling, milling, grinding ). Joining processes and fundamentals of advanced machining: fusion-welding, solid-state welding, laser-beam machining, electron-beam machining, water jet and abrasive water-jet machining, electrical-discharge machining.
This course addresses fundamental issues of Company law in the EEC and in Italy. More information: http://didattica.uniroma2.it
