Wave enhancement due to blockage in semi-submersible and TLP structures

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19 Citations (Scopus)


An exact analytical method is described to solve the diffraction problem of a group of truncated vertical cylinders. In order to account for the interaction between the cylinders, Kagemoto and Yue's exact algebraic method is utilised (Kagemoto, H., Yue, D.K.P., 1986. Interactions among multiple three-dimensional bodies in water waves: an exact algebraic method. J Fluid Mech, 46, 129-139). The isolated cylinder diffraction potential is obtained using Garret's solution and evanescent mode solutions are derived in a similar manner (Garret, C.J.R., 1971. Wave forces on a circular dock. J Fluid Mech, 46, 129-139). Free surface elevations are calculated for an array of four cylinders and compared with experiments. Comparisons show good agreement.
Original languageEnglish
Pages (from-to)471-490
Number of pages19
JournalOcean Engineering
Issue number5
Publication statusPublished - 2001


  • fluid dynamics
  • ocean engineering
  • marine engineering
  • waves


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