Abstract
In the disturbance of unsteady flow field under the sea, the monitoring accuracy and precision of the bottom-mounted acoustic monitoring platform will decrease. In order to reduce the hydrodynamic interference, the platform wrapped with fairing structure and separated from the retrieval unit is described. The suppression effect evaluation based on the correlation theory of sound pressure and particle velocity for spherical wave in infinite homogeneous medium is proposed and the difference value between them is used to evaluate the hydrodynamic restraining performance of the bottom-mounted platform under far field condition. Through the sea test, it is indicated that the platform with sparse layers fairing structure (there are two layers for the fairing, in which the inside layer is 6-layers sparse metal net, and the outside layer is 1-layer polyester cloth, and then it takes sparse layers for short) has no attenuation in the sound pressure response to the sound source signal, but obvious suppression in the velocity response to the hydrodynamic noise. The effective frequency of the fairing structure is decreased below 10 Hz, and the noise magnitude is reduced by 10 dB. With the comparison of different fairing structures, it is concluded that the tighter fairing structure can enhance the performance of sound transmission and flow restraining.
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References
Berteaux, H.O., 1976. Buoy Engineering, John Wiley & Sons, New York, 3–14, 133–141.
Cron, B.F., 1965. Addendum: Spatial-correlation functions for various noise models, The Journal of the Acoustical Society of America, 38(5), 885–890.
Dewi, F.D.E., Liapis, S.I. and Plaut, R.H., 1999. Three-dimensional analysis of wave attenuation by a submerged. horizontal, bottommounted, flexible shell, Ocean Engineering, 26(9), 813–839.
Ghasemloonia, A., Rideout, D.G. and Butt, S.D., 2015. A review of drillstring vibration modeling and suppression methods, Journal of Petroleum Science and Engineering, 131, 150–164.
Hawkes, M. and Nehorai, A., 2001. Acoustic vector-sensor correlations in ambient noise, IEEE Journal of Oceanic Engineering, 26(3), 337–347.
Kandasamy, R., Cui, F.S., Townsend, N., Foo, C.C., Guo, J.Y., Shenoi, A. and Xiong, Y.P., 2016. A review of vibration control methods for marine offshore structures, Ocean Engineering, 127, 279–297.
Keller, B.D., 1977. Gradient hydrophone flow noise, The Journal of the Acoustical Society of America, 62(1), 205–208.
Khorasanchi, M. and Huang, S., 2014. Instability analysis of deepwater riser with fairings, Ocean Engineering, 79, 26–34.
Kramer, M.R., Liu, Z.K. and Young, Y.L., 2013. Free vibration of cantilevered composite plates in air and in water, Composite Structures, 95, 254–263.
Lee, S., 1973. Low frequency responses of spherical and cylindrical pressure-gradient hydrophones due to adjacent turbulent pressure fluctuations, Proceedings of the IEEE International Conference on Engineering in the Ocean Environment, IEEE, Seattle, WA, USA, pp. 371–375.
Mavrakos, S.A. and Chatjigeorgiou, J., 1997. Dynamic behaviour of deep water mooring lines with submerged buoys, Computers & Structures, 64(1-4), 819–835.
Morris, G.B., 1978. Depth dependence of ambient noise in the northeastern Pacific Ocean, The Journal of the Acoustical Society of America, 64(2), 581–590.
Oviedo-Tolentino, F., Pérez-Gutiérrez, F.G., Romero-Méndez, R. and Hernández-Guerrero, A., 2014. Vortex-induced vibration of a bottom fixed flexible circular beam, Ocean Engineering, 88, 463–471.
Piggott, C.L., 1964. Ambient sea noise at low frequencies in shallow water of the Scotian Shelf, The Journal of the Acoustical Society of America, 36(11), 2152–2163.
Roy, J.A., 1998. Measurement of ships’ underwater radiated noise on ranges, UDT Pacific 98 Conference Proceedings, Sydney, 290–295.
Sarpkaya, T., 2004. A critical review of the intrinsic nature of vortexinduced vibrations, Journal of Fluids and Structures, 19(4), 389–447.
Shonting, D., Middleton, F., Knox, J. and Hebda, P., 1996. A submarine-launched wave measuring buoy, Ocean Engineering, 23(6), 465–481.
Von Winkle, W., 1979. Ambient noise in underwater acousitic sonar (R), Nusc. Technical Doc, 6079, 1–25.
Wang, J.X., Gui, H.B., Chen, X. and Fu, Q., 2012. Analysis of attitude and dynamics characteristic of a kind of submerged buoy, Applied Mechanics and Materials, 226-228, 516–520.
Wenz, G.M., 1962. Acoustic ambient noise in the ocean: Spectra and sources, The Journal of the Acoustical Society of America, 34(12), 1936–1956.
Wu, L.H., Li, Y.P., Su, S.J., Yan, P. and Qin, Y., 2014. Hydrodynamic analysis of AUV underwater docking with a cone-shaped dock under ocean currents, Ocean Engineering, 85, 110–126.
Yang, S.E., 2003. Method of multi-sources distinguishing by single vector transducer, Journal of Harbin Engineering University, 24(6), 591–595. (in Chinese)
Yuan, Z.M., Ji, C.Y., Incecik, A., Zhao, W.H. and Day, A., 2016. Theoretical and numerical estimation of ship-to-ship hydrodynamic interaction effects, Ocean Engineering, 121, 239–253.
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Foundation item: This work was financially supported by the Natural Science Foundation of Shandong Province (Grant No. ZR2016DQ18) and Shandong Provincial Key Technologies of Independent Innovation Project (Grant No. 2014GJJS0101).
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Wang, Z., Zheng, Y., Mao, Yf. et al. Research on Hydrodynamic Interference Suppression of Bottom-Mounted Monitoring Platform with Fairing Structure. China Ocean Eng 32, 51–61 (2018). https://doi.org/10.1007/s13344-018-0006-0
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DOI: https://doi.org/10.1007/s13344-018-0006-0