Underwater Acoustic Power Around Submerged Body in Shallow Water Using Boundary Element Method

M. Fatkhurrozi; Irsan S. Brodjonegoro

doi:10.5614/j.eng.technol.sci.2019.51.5.9

Authors

M. Fatkhurrozi Ocean Engineering Program, Faculty of Civil and Environmental Engineering, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,
Irsan S. Brodjonegoro Ocean Engineering Program, Faculty of Civil and Environmental Engineering, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,

DOI:

https://doi.org/10.5614/j.eng.technol.sci.2019.51.5.9

Keywords:

boundary element method, shallow water, submerged body, underwater acoustics, underwater acoustic power

Abstract

Underwater acoustic power around a submerged body in shallow water was investigated using the Boundary Element Method (BEM). The model domain simulated a nearshore environment with shallow water conditions. The seabed was assumed flat and sound velocity was constant over depth. The boundary element method was combined with eigenfunction expansion to model radiation boundary conditions. Underwater acoustic power was calculated from the underwater acoustic potential in the domain. Several cases were investigated in this study: cases with variation of submerged body distance from the seabed, variation of submerged body location from the underwater acoustic source, and variation of submerged body length.

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References

Jensen F.B., Kuperman, W.A., Porter, M.B. & Schmidt, H., Computational Ocean Acoustics, 2nd ed., Springer, 531, 2011.

Katsikadelis, J.T., Boundary Elements Theory and Applications, Elsevier, pp. 2-3, 2002.

Jiang, L., Zou, M., Huang, H. & Feng, X., Integrated Calculation Method of Acoustic Radiation and Propagation for Floating Bodies in Shallow Water, The Journal of the Acoustical Society of America, 143, pp. 431-436, 2018.

Wu, T.W., Boundary Element Acoustics: Fundamentals and Computer Codes, WIT Press, Southhampton, UK, pp. 4-34, 2000.

Grilli, S.T., Pedersen, T. & Stephanishen, P., A Hybrid Boundary Element Method for Shallow Water Acoustic Propagation Over an Irregular Bottom, Engineering Analysis with Boundary Elements, 21, pp. 131-145, 1998.

Grilli, S.T. & Skourup, J., An Efficient Boundary Method for Nonlinear Water Waves, Engineering Analysis with Boundary Elements, 6, pp. 97-107, 1989.

Boas, M.L., Mathematical Methods in The Physical Sciences, John Wiley and Sons Inc., pp. 274-275, 1966.

Grilli, S.T. & Svendsen, I.A., Corner Problems and Global Accuracy in The Boundary Element Solution of Nonlinear Wave Flows, Engineering Analysis with Boundary Elements, 7, pp. 178-195, 1990.

Kinsler, L.E., Frey, A.R., Coppens, A.B. & Sanders, J.V., Fundamentals of Acoustics. 3rd ed., John Wiley and Sons, pp. 99-107, 1982.

Santiago, J.A.F. & Wrobel, L.C., Numerical Modelling of the Propagation of Underwater Acoustic Waves, 15th Brazilian Congress of Mechanical Engineering, 1999.