English Polski
Akademia Morska w Szczecinie

DSpace Home

DSpace/Manakin Repository

Show simple item record

Author Motallebi, Mohammad
Affiliation Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran
E-mail m_motallebi@aut.ac.ir
Author Ghafari, Hamidreza
Affiliation Department of Maritime Engineering, Amirkabir University of Technology, Tehran, Iran
E-mail hamidghafari230@yahoo.com
Author Ghassemi, Hassan
Affiliation Department of Maritime Engineering, Amirkabir University of Technology, Tehran, Iran
E-mail gasemi@aut.ac.ir
Author Shokouhian, Mehdi
Affiliation Morgan State University, Department of Civil Engineering, Baltimore, USA
ISSN printed 1733-8670
URI https://repository.am.szczecin.pl/handle/123456789/2624
Abstract In this paper, the second-order hydrodynamic force on fixed and floating tandem cylinders has been calculated and different parameters have been taken into consideration. An incident wave is diffracted by the fixed cylinder, and as a result low-frequency waves radiate toward the floating cylinder and cause low-frequency second-order hydrodynamic forces to act on the surface of the floating cylinder. The interactions between the fixed and floating cylinders have been investigated by changing the distance between them, as well as the draft and radius of the floating cylinder. By employing perturbation series analysis over the wetted surface, the second-order wave excitation force has been calculated. The maximum force applied on the floating cylinder becomes non-dimensional when considering it with and without the fixed cylinder. The results showed the effect that the existence of the fixed cylinder had on the increase in the second-order forces is quite evident where, for a significant parameter of the floating cylinder, the force in the heave direction was enhanced by up to 1.55 times.
Pages 108-115
Publisher Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie
Keywords fixed cylinder
Keywords floating cylinder
Keywords second order hydrodynamic force
Keywords diffracted wave
Keywords potential theory
Title Calculating the second-order hydrodynamic force on fixed and floating tandem cylinders
  1. Abyn, H., Islam, M.R., Maimun, A., Mahmoudi, A. & Kato, J. (2016) Experimental Study of Motions of Two Floating Offshore Structures in Waves. Brodogradnja 67(2), pp. 1–13.
  2. Ali, M.T. & Khalil, G.M. (2005) On hydrodynamic interaction between several freely floating vertical cylinders in waves. ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering. June 12–17, 2005, Halkidiki, Greece. American Society of Mechanical Engineers Digital Collection, pp. 391–398.
  3. Barltrop, N.D.P. (1998) Floating Structures: A guide for design and analysis. CMPT.
  4. Chau, F.P. & Eatock Taylor, R. (1992) Second-order wave diffraction by a vertical cylinder. Journal of Fluid Mechanics 240, pp. 571–599.
  5. Chua, K.H., Eatock Taylor, R. & Choo, Y.S. (2018) Hydrodynamic interaction of side-by-side floating bodies part I: Development of CFD-based numerical analysis framework and modified potential flow model. Ocean Engineering 166, pp. 404–415.
  6. Fonseca, N., Pessoa, J., Mavrakos, S. & Le Boulluec, M. (2011) Experimental and numerical investigation of the slowly varying wave exciting drift forces on a restrained body in bi-chromatic waves. Ocean Engineering 38 (17– 18), pp. 2000–2014.
  7. Ghafari, H. & Dardel, M. (2018) Parametric study of catenary mooring system on the dynamic response of the semi-submersible platform. Ocean Engineering 153, pp. 319–332.
  8. Ghafari, H.R., Ketabdari, M.J., Ghassemi, H. & Homayoun, E. (2019) Numerical study on the hydrodynamic interaction between two floating platforms in Caspian Sea environmental conditions. Ocean Engineering 188, 106273.
  9. Hu, J. & Zhou, L. (2017) Experimental and numerical study on wave drift forces on a semi-submersible platform in waves. Ships and Offshore Structures 12(1), pp. 56–65.
  10. Huang, J.B. & Eatock Taylor, R. (1996) Semi-analytical solution for second-order wave diffraction by a truncated circular cylinder in monochromatic waves. Journal of Fluid Mechanics 319, pp. 171–196.
  11. Jin, Y., Chai, S., Duffy, J., Chin, C. & Bose, N. (2018) URANS predictions on the hydrodynamic interaction of a conceptual FLNG-LNG offloading system in regular waves. Ocean Engineering 153, pp. 363–386.
  12. Lim, D.-H. & Kim, Y. (2018) Design wave method for the extreme horizontal slow-drift motion of moored floating platforms. Applied Ocean Research 71, pp. 48–58.
  13. Lupton, R.C. & Langley, R.S. (2017) Scaling of slow-drift motion with platform size and its importance for floating wind turbines. Renewable Energy 101, pp. 1013–1020.
  14. Pegalajar-Jurado, A. & Bredmose, H. (2019) Reproduction of slow-drift motions of a floating wind turbine using second-order hydrodynamics and Operational Modal Analysis. Marine Structures 66, pp. 178–196.
  15. Pinkster, J.A. (1980) Low frequency second order wave exciting forces on floating structures. Doctoral thesis. TU Delft.
  16. Renaud, M., Rezende, F., Waals, O., Chen, X.-B. & van Dijk, R. (2008) Second-order wave loads on a LNG carrier in multi-directional waves. ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. June 15–20, 2008, Estoril, Portugal. American Society of Mechanical Engineers Digital Collection, pp. 363–370.
  17. Teng, B. & Kato, S. (1999) A method for second-order diffraction potential from an axisymmetric body. Ocean Engineering 26(12), pp. 1359–1387.
  18. Vazquez, J.H. (1995) Hydrodynamic loads on offshore structures in bichromatic bidirectional seas. Doctoral thesis. University of Houston.
  19. Zhang, L.R., Lu, H., Yang, J., Peng, T. & Xiao, L. (2013) Low-frequency drift forces and horizontal motions of a moored FPSO in bi-directional swell and wind-sea offshore West Africa. Ships and Offshore Structures 8(5), pp. 425–440.
ISSN on-line 2392-0378
Language English
Funding No data
Figures 6
Tables 2
DOI 10.17402/425
Published 2020-06-29
Accepted 2020-04-08
Recieved 2019-12-09

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search repository

Advanced Search


My Account

RSS Feeds