Electrical Engineering

Activity type

Attività formative affini o integrative

SSD

ICAR/08

Year

1st year

Semester

2nd semester

CFU

3

Hours distribution

30 classroom hours

Lecturers

ANNAMARIA PAU

Activity type

Attività formative affini o integrative

SSD

ING-IND/13

Year

1st year

Semester

2nd semester

CFU

3

Hours distribution

30 training hours

Lecturers

FRANCESCO MASSI

Module: Building science
At the end of the course, learners will be able to:
- evaluate the stress in structural components of trusses
- employ the relatioships between the characteristics quantities of electric conductors (inextensible cable) such as: deflection, tension and length
- define the critical load of structural elements subjected to compression force (buckling);
- calculate stress and strains of simple structural elements subjected to compression, bending and/or torsion



Module: Applied mechanics
Know and apply the fundamental laws of mechanics and the physical-mathematical models of structural and material mechanics; knowing how to use models and conceptual tools for mechanical design and analysis of the resistance of materials and structures; be able to analyze and optimize mechanical systems and structures. Know and learn the functioning of the main mechanical components. Develop the skills that lead to recognizing, setting up and solving structural resistance problems.

Module: Building science
In order to understand the topics that will be presented in the course and achieve the learning outcomes, students should be acquainted with some basic concepts of calculus, in particular:
- vectors
- solution of systems of algebraic equations
- limits and derivatives
- study of function.
- ordinary and partial differential equations
Students should also be familiar with basic concepts structural mechanics
- balance of systems of forces
- be able to determine reaction forces in statically determined systems
- be able to calculate and draw diagrams of axial force, shear and bending moment



Module: Applied mechanics
No particular prerequisites are required.

Module: Building science
Some elements of structural mechanics.
Structural support to power lines
- Trusses
- Method of joints and Ritter method
- Stress and strain analysis in plane trusses
Structural problems in Electrotechnics
- The electric cable as a structure: tension and deflection
- Instability in supporting trusses and in light poles
- Torsion in drive shafts



Module: Applied mechanics
Fundamental Mechanics
The core of Mechanics: geometry; kinematics; dynamics.
Scalars and vectors Operations on vectors: sum, product, derivative, moments.
Mechanical systems and machines. Goals and structure of machines; solids, couplings of solids, kinematic chains, mechanisms, conversion of energy.
The motion of the fundamental geometrical entities: points and rigid bodies.
Motion of points: trajectory, speed, acceleration, normal and tangent acceleration, meaning of the normal acceleration.
Motion of rigid bodies: plane motion, infinitesimal motion, finite motion. Motion of points connected to bodies. The polars of the motion; trajectories, conjugate profiles. Reference systems; relative motion; Coriolis Theorem.
Machinery. Degrees of freedom; instantaneous motion center, Kennedy's theorem, analysis of common planar machinery.
Dynamics. Newton's laws; forces and moments, both external and internal, momentums; D'Alembert's principle; equilibrium of bodies.
Work and energy. Theroem of works; efficiency; direct and reverse motion; series and parallel machinery; power.
Contact and friction. Direct and indirect friction, rotational friction; wear. Tribology in
the actual industrial context.
Transformation of energy. Hydraulic turbines; Pelton, Francis and Kaplan turbines. Specific speed. Turbines for variable-density fluids.
Transmission of motion. Friction wheels; cylindrical and conic gears; interference; least number of teeth; reducers; analysis of velocity changes; transmission using timing belts.
Ropes; pulleys; transmission using ropes.
Ball bearings. Wear. Design for durability and reliability.
Vibrations. Vibration of systems with one degree of freedom: free, damped, forced and damped. The coefficient of dynamic amplification.

Module: Building science
R.C. Hibbeler, Mechanics of Materials. Pearson


Module: Applied mechanics
- Notes of the classes available online (didatticaingegneria);
- C. Ferraresi, T. Raparelli, Meccanica Applicata, 2007 (terza edizione) - CLUT (TO).

Module: Building science
N/D
Module: Applied mechanics
N/D

Module: Building science
Ex cathedra lectures present the topics listed in the program.


Module: Applied mechanics
The course will take place through lectures, during which the basic theoretical topics and the functioning of the most common mechanical organs will be exposed. Numerical tools for mechanical drawing will also be presented.

Module: Building science
Not compulsory.


Module: Applied mechanics
Attendance strongly recommended.

Module: Building science
In the oral test, students have to prove their ability to discuss and present the subjects treated in the lectures, enunciate and demonstrate theorems, define mechanical quantities and principles that rule statics and kinematics of the systems under study.


Module: Applied mechanics
Oral discussion on the issues presented during the classes, with exercises on kinematics and dynamics. To pass the exam the student must obtain a mark not less than 18/30. The student must demonstrate that he/she has acquired sufficient knowledge of the topics covered by the course program. To achieve a score of 30/30 cum laude, the student must instead demonstrate that he/she has acquired excellent knowledge of all the topics covered during the course, being able to propose analysis approaches and methods of consistent resolution of the problems related to the course.

Module: Building science
In the final oral test the students are asked questions concerning theory and applications presented in the lectures.


Module: Applied mechanics
Example of questions:
-What are the clutches? Why are multi-disc clutches used for specific applications?
-In a hydrodynamic bearing, what causes an increase in the viscosity of the lubricant? What consequences, pros and cons?
-What is the difference between an epicyclic gear train and an ordinary one? In a gear, how is the module defined, and what is it for?
-Explain and qualitatively draw the contributions of the homogeneous and particular response contribution to the total response for a system with 1 degree of freedom;

Module: Building science
N/D
Module: Applied mechanics
N/D