Mechanical Vibrations and Noise
Code
3668
Academic unit
Faculdade de Ciências e Tecnologia
Department
Departamento de Engenharia Mecânica e Industrial
Credits
6.0
Teacher in charge
António Paulo Vale Urgueira
Weekly hours
5
Total hours
70
Teaching language
Português
Objectives
The student should be able to create mathematical and physical models ir order to understand the behaviour of simple mechanical systems or structures. The student should be also able to design or modify those mechanical systems in order to attain some dynamic properties. Concerning noise the student should understand the basic concepts of noise measurement and isolation
Subject matter
|
Basic concepts of vibrations. Classification of vibrations. elements of a vibratory system. Harmonic analysis. Free vibration of single degree of freedom systems. Viscous, coulomb and histeretic damping. Discretization of systems. Springs and dumpers. D’alembert principle. Harmonically excited vibrations. Transmissibility vibration under general forcing conditions. Two degree of freedom systems. Multidegree of freedom systems. Determination of natural frequencies and mode shapes. continuous systems. Vibration control. Fundamental concepts of noise. Acoustic pressure, intensity and power. Effects of noise on the human being. Noise measurement and control |
Bibliography
|
Singiresu S Rao - Mechanical Vibrations; 3ª edição Addison-Wesley António P. Vale Urgueira - Manual de Apoio à Disciplina edição de 2004 S. Graham Kelly - Fundamentals of Mechanical Vibrations; McGraw-Hill Engineering Vibrations - Daniel J. Inman |
Teaching method
| Lectures and problem-solving sessions |
Evaluation method
|
The approval on the discipline depends on the average mark of 9.5 resulting from the distributed evaluation conducted throughout the semester, or by obtaining the mark of 9.5 in the final exam The distributed evaluation comprises the realization of 3 components (theoretical and practical) termed T1, T2 and T3. The final average mark is calculated as follows: Final average mark = 0.1 T1 + 0.45 T2 + 0.45 T3 |