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http://dx.doi.org/10.7837/kosomes.2020.26.3.297

Noise Analysis for Large Silencers of Ships and Off-shore Plants using Energy Flow Analysis  

Kim, Tae-Gyoung (Department of Naval Architecture and Ocean Engineering, Seoul National University)
Song, Jee-Hun (Department of Naval Architecture and Ocean Engineering, Chonnam National University)
Hong, Suk-Yoon (Department of Naval Architecture and Ocean Engineering, Seoul National University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.26, no.3, 2020 , pp. 297-307 More about this Journal
Abstract
In the study, energy flow analysis is performed to predict the performance of silencers. To date, deterministic approaches such as finite element method have been widely used for silencer analysis. However, they have limitations in analyzing large structures and mid-high frequency ranges due to unreasonable computational costs and errors. However, silencers used for ships and off-shore plants are much larger than those used in other engineering fields. Hence, energy governing equation, which is significantly efficient for systems with high modal density, is solved for silencers in ships and off-shore plants. The silencer is divided into two different acoustic media, air and absorption materials. The discontinuity of energy density at interfaces is solved via hypersingular integrals for the 3-D modified Helmholtz equation to analyze multi-domain problems with the energy flow boundary element method. The method is verified by comparing the measurements and analysis results for ship silencers over mid-high frequency ranges. The comparisons confirm good agreement between the measurement and analysis results. We confirm that the applied analysis method is useful for large silencers in mid-high frequency ranges. With the proven procedures, energy flow analysis can be performed for various types of silencer used in ships and off-shore plants in the first stage of the design.
Keywords
Energy flow analysis; Multi-domain boundary element method; Hypersingular integral; Silences for ships; Mid-to-high frequency;
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1 Williams, P., R. Kirby, J. Hill, M. Abom, and C. Malecki(2018), Reducing low frequency tonal noise in large ducts using a hybrid reactive-dissipative silencer, Applied acoustics, Vol. 131, pp. 61-69.   DOI
2 Wu, T. W.(1998), A direct boundary element method for acoustic radiation and scattering from mixed regular and thin bodies, Journal of the Acoustical Society of America, Vol. 97, No. 1, pp. 767-779.
3 Wu, T. W. and G. C. Wan(1996), Muffler performance studies using a direct mixed-body boundary element method and a three-point method for evaluating transmission loss, Journal of Sound and Vibration, Vol. 118, No. 3, pp. 479-484.
4 Yao, D., J. Zhang, R. Wang, X. Xiao, and J. Guo(2019), Lightweight design and sound insulation characteristic optimisation of railway floating floor structures, Applied Acoustics. Vol. 156, pp. 66-77.   DOI
5 Belov, V. D. and S. A. Rybak(1977), Propagation of vibrational energy in absorbing structures, J. Soviet Pysics Acoustic, Vol. 23, pp. 115-119.
6 Besset, S., M. N. Ichochou, and L. Jezequel(2010), A coupled BEM and energy flow method for mid-high frequency internal acoustic, Journal of Computational Acoustics, Vol. 18, pp. 69-85.   DOI
7 Bitsie, F.(1996), The structural-acoustic energy finite energy method and energy boundary element method, Purdue University, Doctoral dissertation.
8 Bride, W. T. and W. D. Bevirt(1994), Sound and vibration design and analysis, 1st Edition, Rockville, Maryland.
9 Delany, M. E. and E. N. Bazley(1970), Acoustical properties of fibrous materials, Applied acoustics, Vol. 3, No. 2, pp. 105-116.   DOI
10 Errico, F., M. Ichchou, F. Franco, S. De Rosa, O. Bareille, and C. Droz(2019), Schemes for the sound transmission of flat, curved and axisymmetric structures excited by aero dynamic and acoustic sources, Journal of Sound and Vibration, Vol. 456, pp. 221-238.   DOI
11 European Standard EN ISO 29053:1993(1993), Acoustics: materials for acoustical applications. Determination of airflow resistance.
12 European Standard EN ISO 7235(2003), Measurement procedures for ducted silencers - insertion loss, flow noise and total pressure loss.
13 Ge, Y. S. and H. B. Zhang(2006), An analysis on 3D acoustic performance of automotive exhaust muffler, Automotive Engineering, Vol. 28, No. 1, pp. 51-55.   DOI
14 Holland, C. G. and S. F. Wong(1995), Noise prediction and correlation with full scale measurements in ships, Trans IMarE, Vol. 107, No. 3, pp. 195-207.
15 Krishnasamy, G., F. J. Rizzo, L. W. Schmerr, and T. J Rudolphi(1990), Hypersingular boundary integral equations: some applications in acoustic and elastic wave scattering, Journal of applied mechanics, Vol. 27, No. 2, pp. 404-414.
16 Ju, H. D., S. B. Lee, and Y. B. Park(2007), Transmission loss estimation of splitter silencer using multi-domain BEM, Journal of Mechanical Science and Technology, Vol. 21, No. 12, pp. 2073-2081.   DOI
17 Kirby, R. and A. Cummings(1998), The impedance of perforated plates subjected to grazing gas flow and backed by porous media, Journal of Sound and Vibration, Vol. 217, No. 4, pp. 619-636.   DOI
18 Kirby, R. and P. T. Williams(2014a), A three dimensional investigation into the acoustic performance of dissipative splitter silencers, Journal of the Acoustical Society of America, Vol. 135, No.5, pp. 2727-2737.   DOI
19 Kirby, R. and P. T. Williams(2014b), The effect of higher order modes on the performance of large diameter dissipative silencers, Journal of the Acoustical Society of America, Proceedings of Forum Acusticum.
20 Ko, S. H(1975). Theoretical analyses of sound attenuation in acoustically lined flow ducts separated by porous splitters (rectangular, annular and circular ducts), Journal of Sound and Vibration, Vol. 39, No. 4, pp. 471-487.   DOI
21 Kwon, H. W., S. Y. Hong, D. H. Park, H. G. Kil, and J. H. Song(2012), Vibrational energy flow models for out-of-plane waves in finite thin shell, Journal of Mechanical Science and Technology, Vol. 26 No. 3, pp. 689-701.   DOI
22 NORSOK STANDARD(1999), Piping and equipment insulation, R-004, Rev. 2.
23 Kwon, H. W., S. Y. Hong, H. W. Lee, and J. H. Song(2011), Power flow boundary element analysis for multi-domain problems in vibrational built-up structures, Journal of sound and Vibration, Vol. 330, pp. 6482-6494.   DOI
24 Lyon, R. H. and R. G. Dejong(1995), Theory and Application of Statistical Energy Analysis, 2nd Edition, Butterworth-Heinemann, London.
25 Kakoty, S. K. and V. K. Roy(2002), Bulk reaction modeling of ducts with and without mean flow, Journal of the Acoustical Society of America, Vol. 112, No. 75, pp. 75-112.   DOI
26 Mehdizadeh, O. Z. and M. Paraschivoiu(2005), A three -dimensional finite element approach for predicting the transmission loss in mufflers and silencers with no mean flow, Applied Acoustics, Vol. 66, No. 8, pp. 902-918.   DOI
27 Nefske, D. J. and S. H. Sung(1989), Power flow finite element analysis of dynamic systems: basic theory and application to beams, Journal of Vibration, Acoustics, Stress and Reliability in Design, Vol. 111, No. 1, pp. 94-100.   DOI
28 Reynolds, D. D. and J. M. Bledsoe(1991), Algorithms for HVAC acoustics, American Society of Heating, Refrigeration and Air Conditioning, Atlanta.
29 Selamet, A., I. J. Lee, Z. L. Ji, and N. T. Huff(2001), Acoustic attenuation performance of perforated absorbing silencers, SAE Technical Paper 2001-01-1435.
30 Shojaeefard, M. H. and R. Talebitooti(2012), A study of intake system noise transmission with porous insulator using Statistical Energy Analysis, International Journal of Automotive Engineering, Vol. 2, No, 1.
31 Williams, P. T., R. Kirby, C. Malecki, and J. Hill(2014), Measurement of the bulk acoustic properties of fibrous materials at high temperatures, Applied acoustics, Vol. 77, pp. 29-36.   DOI
32 Soares, C. G. and W. Fricke(2011), Advances in Marine Structure, Boca Raton.
33 Verin, O. and N. Fremion(2010), Noise Control: From initial design to launch of the vessel, 10eme Congres Francais d'Acoustique: Lyon, 12-16 April.
34 Wang, P. and T. W. Wu(2016), Impedance-to-scattering matrix method for large silencer analysis using direct collocation, Engineering Analysis with Boundary Element, Vol. 73, pp. 191-199.   DOI