Abstract
Internal soliton forces on oil-platform piles in the ocean are estimated with the Morison Formula. Different from surface wave forces, which change only in magnitude along a pile, internal soliton forces can be distributed over the entire pile in the water and they change not only in magnitude but also in direction with depth. Our calculations show that the maximum total force caused by a soliton with its associated current of 2.1 m s−1 is nearly equal to the maximum total force exerted by a surface wave with a wavelength of 300 m and a wave-height of 18m. The total internal soliton force is large enough to affect the operations of marine oil platforms and other facilities. Therefore, the influence of internal solitons should not be neglected in the design of oil platforms.
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Bole, J. B., C. C. Ebbesmeyer, and R. D. Romea, 1994. Soliton currents in the South China Sea: measurements and theoretical modeling. Offshore Tech. Conf., 7417: 367–376.
Cai, S. Q., X. M. Long, and Z. J. Gan, 2002. Preliminary study of forces and torques exerted by internal solitons on small-diameter cylindrical piles. J. Hydrodyn., Ser. A, 17(4): 497–505 (in Chinese with English abstract).
Cai, S. Q., X. M. Long, and Z. J. Gan, 2003. A method to estimate the forces exerted by internal solitons on cylindrical piles. Ocean Eng., 30: 673–689.
Communication Ministry of the P. R. China, 1998. Trade Norm of the P. R. China (JTJ213-98), Specifications for Harbor Hydrology. China Communications Press, Beijing, 219 pp.
Ebbesmeyer, C. C., and C. A. Coomes, 1991. New observations on internal waves (solitons) in the South China Sea using an acoustic doppler current profiler. Mar. Tech. Soc. 91 Proc., New Orleans, 165–175.
Fang, X. H., M. S. Jiang, and T. Du, 2000. Dispersion relation of internal waves in the western equatorial Pacific Ocean. Acta Oceanol. Sinica, 19(4): 37–45.
Lamb, H., 1975, Hydrodynamics. Sixth edition. Cambridge University Press, London, 738 pp.
Liu, A. K., Y. S. Chang, M. K. Hsu, and N. K. Liang, 1998. Evolution of nonlinear internal waves in China Seas, J. Geophys. Res., 103(C4): 7997–8008.
Osborne, A. R., T. L. Burch, and R. I. Scarlet, 1978. The influence of internal waves on deep-water drilling. J. Petrol. Tech., Oct: 1497–1504.
Zheng, Q., Y. Yuan, V. Klemas, and X. Yan, 2001. Theoretical expression for an ocean soliton synthetic aperture radar image and determination of the soliton characteristic half width. J. Geophys. Res., 106(C11): 31415–31423.
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Du, T., Sun, L., Zhang, Y. et al. An estimation of internal soliton forces on a pile in the ocean. J Ocean Univ. China 6, 101–106 (2007). https://doi.org/10.1007/s11802-007-0101-y
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DOI: https://doi.org/10.1007/s11802-007-0101-y