Noise and Vibration
Name: Noise and Vibration
Code: EME13151M
6 ECTS
Duration: 15 weeks/156 hours
Scientific Area:
Mechanical Engineering
Teaching languages: Portuguese
Languages of tutoring support: Portuguese
Sustainable Development Goals
Learning Goals
Knowledge of linear systems with 1 degree of freedom.
Knowledge of linear systems with n degrees of freedom, including computational applications.
Knowledge of non-linear systems with 1 degree of freedom.
The domain of continuous systems with analytical solutions.
In-depth knowledge of noise in its technical aspects.
Knowledge of information sources and measurement equipment.
Knowledge of Software for dynamic and coupled systems.
Ability to identify industrial problems with solutions under vibration and noise.
Knowledge of linear systems with n degrees of freedom, including computational applications.
Knowledge of non-linear systems with 1 degree of freedom.
The domain of continuous systems with analytical solutions.
In-depth knowledge of noise in its technical aspects.
Knowledge of information sources and measurement equipment.
Knowledge of Software for dynamic and coupled systems.
Ability to identify industrial problems with solutions under vibration and noise.
Contents
1) Relevant laboratory equipment: accelerometers, hand vibrometers, microphones, and data loggers.
2) Linear systems with 1 degree of freedom.
3) Principle of virtual power. Euler-Lagrange equations.
4) Deduction of mass matrices, damping, and stiffness for n degrees of freedom.
5) Laboratory experiments in model structures. Experimental modal analysis.
6) Modal superposition and truncated modal superposition - static shift and static correction.
7) Generalized proportional damping. Reduction to first order.
8) Analysis of continuous medium - second and fourth-order hyperbolic systems.
9) Non-linear vibrations: Routh-Hurwitz criterion, Liapunov criterion. Methods of perturbation, method of Lindsedt. Noise and acoustics: pressure and acoustic power, noise level, noise exposure, noise perception, reflection, flutter.
10) Reverberation, absorption and transmission, propagation, and structures. Application examples.
2) Linear systems with 1 degree of freedom.
3) Principle of virtual power. Euler-Lagrange equations.
4) Deduction of mass matrices, damping, and stiffness for n degrees of freedom.
5) Laboratory experiments in model structures. Experimental modal analysis.
6) Modal superposition and truncated modal superposition - static shift and static correction.
7) Generalized proportional damping. Reduction to first order.
8) Analysis of continuous medium - second and fourth-order hyperbolic systems.
9) Non-linear vibrations: Routh-Hurwitz criterion, Liapunov criterion. Methods of perturbation, method of Lindsedt. Noise and acoustics: pressure and acoustic power, noise level, noise exposure, noise perception, reflection, flutter.
10) Reverberation, absorption and transmission, propagation, and structures. Application examples.
Teaching Methods
Teaching is based on theoretical classes and theoretical-practical classes, which provide an introduction to the modeling, measurement, and experimental tools associated with the study of mechanical vibrations, as well as an introduction to the study of noise associated with mechatronic systems.
Student Accompaniment and Attendance:
- Office hours available twice a week, in two-hour sessions, held in the professor?s office. Email may be used for basic inquiries or to schedule an alternative meeting time that accommodates each student?s needs.
Student Accompaniment and Attendance:
- Office hours available twice a week, in two-hour sessions, held in the professor?s office. Email may be used for basic inquiries or to schedule an alternative meeting time that accommodates each student?s needs.
Assessment
The assessment elements of the curricular unit are graded on a scale from [0, 20]. Continuous assessment or final exam assessment is carried out in accordance with the Academic Regulations of the University of Évora.
The assessment method consists of the following components:
[S] Series of 5 problems (25%);
[P] Individual final Project (25%);
[T] Test (50%);
[E] Final Examination.
Students can choose between one of two possible assessment methods, where the Final Grade [FG] is calculated as follows:
i) CONTINUOUS ASSESSMENT: FG = 0.25*S + 0.25*P + 0.50*T
if FG>= 9.5 ^ T>= 8.0 then student is Approved;
ii) FINAL ASSESSMENT: FG = E
if FG>= 9.5 then the student is Approved.
The assessment method consists of the following components:
[S] Series of 5 problems (25%);
[P] Individual final Project (25%);
[T] Test (50%);
[E] Final Examination.
Students can choose between one of two possible assessment methods, where the Final Grade [FG] is calculated as follows:
i) CONTINUOUS ASSESSMENT: FG = 0.25*S + 0.25*P + 0.50*T
if FG>= 9.5 ^ T>= 8.0 then student is Approved;
ii) FINAL ASSESSMENT: FG = E
if FG>= 9.5 then the student is Approved.
Accreditations and Certifications
