Assignment: Acoustics and Noise Control (Jan-Apr 2017)
Department of Mechanical Engineering Faculty of Engineering, UCSI University Kuala Lumpur EM417 Acoustics and Noise Control (Jan-Apr 2017) Assignment: Acoustical Modeling of Urban Building Design INSTRUCTION TO ALL STUDENTS: 1. One group is composed of 2-3 students. 2. Write all members' name and student ID at the cover page. 3. Each student need to fill up the peer assessment form. 4. The report must be submitted by 6 April 2017 (Thursday), in both hardcopy and soft-copy (wordfile). Late submission will not be entertained. 5. Marks distribution: Elements
Marks
Group Assignment
15
Peer Assessment Form
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6. The group assignment marks are given based on the content and completeness of report, therefore make it precise enough within 20 pages. 7. Comply all the formatting as prescribed.
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Assignment: Acoustics and Noise Control (Jan-Apr 2017)
During an urban design, the buildings can be constructed in certain ratio to prevent noise propagation, from one region to another. Consider the twin-tower building structures can be modeled as follows: U
a Ρa
a
Figure 1: Building design with varied Ρ.
U is the upstream velocity of the noise source, a is the distance/length of the building section as prescribed, while Ρ is a real number with the range of 0.5 ≤ Ρ ≤ 1.5. The governing equation for this case is the two dimensional wave equation, given as: đ?œ• 2đ?‘˘ đ?œ• 2đ?‘˘ đ?œ• 2đ?‘˘ 2 = đ?‘? ( + ) đ?œ•đ?‘Ą 2 đ?œ•đ?‘Ľ 2 đ?œ•đ?‘Ś 2 where t is time, x and y are the spatial components, while u is the speed of mechanical displacement. Setting a = 10, c = 1 and U = 1, compute the distribution of mechanical displacement speed, u across the entire domain as shown in Figure 1. Take Ρ = 0.50, 0.75, 1.00, 1.25 and 1.50. 2
Assignment: Acoustics and Noise Control (Jan-Apr 2017)
In a report NOT MORE THAN 20 PAGES (only cover page and appendix can be excluded), include the following details: - COVER PAGE1.
Introduction to Engineering Acoustics and Urban Design*
2.
Methodology and Explicit Solution**
3.
Distribution of Mechanical Displacement Speed at Different Front Height, Ρ
4.
Discussion of Results***
5.
Conclusion
-APPENDIX* The introduction shall at least include: (1) the importance of noise control; (2) roles of acoustics in urban planning; (3) description of project. ** You may use other method other than explicit solution, such as Runge-Kutta method and implicit methods. Kindly refer to "Chapra and Canale (2010). Numerical Methods for Engineers, 6th Ed. Mcgraw Hill Higher Education" or any other numerical/computational textbook for more information. *** Discussion of the results shall at least include: (1) the description of relationship between Ρ and u; (2) suggestion on how to reduce noise; (3) laws/precautions in pre-empt noise pollution. Note: 1. Include a maximum 300 words of abstract at the Cover Page. 2. Include at least your MATLAB coding in your appendix. Codes will be tested and re-run during evaluation. The shorter the codes, the better the codes. 3. You may use any software such as ANSYS or COMSOL OR use analytical solutions to validate/check your computed results.
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Assignment: Acoustics and Noise Control (Jan-Apr 2017)
Format of the report: 1. Font style: Times News Roman 2. Font size: 12 3. Line spacing: 1.5 4. Line alignment: Justify 5. No "tab" or space at the beginning of every paragraph 6. Heading: See examples 1.0 Introduction to Engineering Acoustics and Urban Design xxxxxxxx xxxxxxxx 1.1 AAA xxxxxxxx xxxxxxxx 2.0 Methodology and Explicit Solution xxxxxxxx xxxxxxxx 7. Tables and Figures: See examples
Table 1: The relationship between A and B A
B
0.254
7.523
1.569
8.578
Figure 1: v-velocity profile along horizontal centerline by SIMPLE algorithm 4
Assignment: Acoustics and Noise Control (Jan-Apr 2017)
Note: Space one line before and after every figure or/and table. The figure(s) must be clear to be seen. 8. Equations: See examples đ?œ•2 đ?‘˘ đ?œ•đ?‘Ą 2
đ?œ•2 đ?‘˘
đ?œ•2 đ?‘˘
= đ?‘? 2 (đ?œ•đ?‘Ľ 2 + đ?œ•đ?‘Ś 2 )
(1)
Note: No need to space one line after an equation. 9. Page margin: Default Microsoft Word Margin (2.54 cm all around) 10. Citation/reference format: See examples REFERENCES (Chicago Style) [1]
Chen, Shiyi, and Gary D. Doolen. "Lattice Boltzmann method for fluid flows."Annual review of fluid mechanics 30, no. 1 (1998): 329-364.
[2]
Bejan, Adrian. Convection heat transfer. John wiley& sons, 2013.
[3]
Tamura, I., Y. Tomota, and M. Ozawa. "Strength and ductility of Fe-Ni-C alloys composed of austenite and martensite with various strengths." In Proc. Conf. on Microstructure and Design of Alloys, Institute of Metals and Iron and Steel Institute, London. 1973, 1,(129): 611-615. 1973.
ALL THE BEST!
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