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Noise and Vibrations
Scholar Year: 2020/2021 - 1S
| Code: |
EM21216 |
|
Acronym: |
VR |
| Scientific Fields: |
Mecânica dos Meios Sólidos |
Courses
| Acronym |
N. of students |
Study plan |
Curricular year |
ECTS |
Contact time |
Total Time |
| EM |
48 |
|
2º, 3º |
6,0 |
60 |
162,0 |
Teaching language
Portuguese
Intended learning outcomes (Knowledges, skills and competencies to be developed by the students)
Provide students with the necessary knowledge for the understanding of vibration phenomena in structures and equipments. Knowledge of the components of a vibrating system mass/spring/damper. Discussion of the system response related with the components. Identification of the resonance phenomenon. Quantification of vibration signals in different quantities: acceleration, velocity, displacement. Typical fault diagnostics detected by vibration analysis. In the field of noise is intended to teach the basic concepts of acoustics. Know and relate the quantities: pressure, intensity and sound power. The correspondent’s magnitudes in dB scale. Learn how to add and subtract quantities in dB. Equal loudness curves and weighted functions (A, B, C and D). Learn to use the most common functions of an measuring noise devices (sound meters and dosimeters).
Syllabus
Part I Vibrations 1. Introduction to Vibrations 2. Formulating the equations of motion for one degree of freedom 3. Characterizations signals 4. Faults Diagnosis of equipment’s using vibration analysesPart II Acoustics 5. Acoustic Concepts
Software
HP-VEE
Working Model
Keywords
Technological sciences > Engineering > Mechanical engineering > Vibration engineering
Technological sciences > Engineering > Sound engineering
Demonstration of the syllabus coherence with the UC intended learning outcomes
Classes of theoretical and practical nature. After the presentation of the theoretical material, problems similar to those found in real cases will be performed.
During the semester, laboratory work will be carried out with the preparation of a report.
The relevant information will be made available on the Moodle platform in the instance called Vibrations and Noise.
Students must register in this instance to have access to this information and to submit laboratory reports.
Teaching methodologies
In order to obtain the frequency in the subject the students must carry out the laboratory work. Each of these activities will be graded 0 to 20 values and will enter the final classification calculation. Failure to carry out one of the activities implies a classification of zero in this activity and does not impede the passing of the course.
The report's deadline is one week after the laboratory is held. For each day of delay in the delivery of the work will be deducted 1 value in the classification of laboratorial work.
Demonstration of the teaching methodologies coherence with the curricular unit's intended learning outcomes
To obtain proficiency in the subject the student will have to perform two tests throughout the semester.
The calculation of the Final Classification obeys the following expression:
.
. NF = 0.3 * (T1 + T2) + 0.4 * MedTLi
.
. NF - Final Note
. T1 - 1st Test
. T2 - 2nd Test
. MedTLi - Labor Average Laboratory
.
The grade of each of the laboratory work will be obtained
.TLi = 0.2 * PAL + 0.8 * Rel
.PAL - Student Preparation and Attitude for and During the Laboratory
.Rel - Labor Report
Condition to obtain utilization:
T1 or T2> = 8.0 and NF> = 10 (after rounding)
Restrictions:
.Se (T1 + T2) / 2 <9.5 a NF = the Mean of the Tests
Assement and Attendance registers
| Description |
Type |
Time (hours) |
End Date |
| Attendance (estimated) |
Classes |
0 |
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| |
Total: |
0 |
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