Hydro-elastic dynamic analysis of large-scale flexible offshore platforms Conference Paper uri icon


  • Recently, various types of large-scale offshore structures, such as floating offshore airport, offshore floating bridges, floating offshore mobile base, floating offshore cities/plants, multiply connected floating breakwaters and wave energy converters, have been proposed. When designing such large-scale flexural floating structures, a complete coupled hydro-elastic theory including the structures' essential elastic modes needs to be developed; for instance, more complete diffraction/radiation/hydrostatic/inertia-Analysis computer program including all the essential elastic modes has to be used for more reliable dynamic analysis. Such a hydro-elastic theory and computer program have been developed in the frequency domain. The fully coupled interactions among elastic motions, 6 DOF (degree of freedom) rigidbody motions, and diffracted and radiated waves are solved and the corresponding RAOs (response amplitude operators) are obtained. Subsequently, the full distributions of shear forces and bending moments are calculated considering the balance of inertia/restoring loadings and hydrodynamic loadings. The developed computer program is applied to a barge-type VLFS (very large floating structure) with various bending stiffness EIs. The contributions of constituent components for shear forces and bending moments are also compared. By using the frequency-domain results, how to estimate the statistical maximum shear force and bending moment along the sections of the barge in irregular waves is explained. Copyright 2012 by the International Society of Offshore and Polar Engineers (ISOPE).

published proceedings

  • Proceedings of the International Offshore and Polar Engineering Conference

author list (cited authors)

  • Kang, H. Y., Kim, M. H., Kim, M. K., & Cho, J. Y.

complete list of authors

  • Kang, HY||Kim, MH||Kim, MK||Cho, JY

publication date

  • September 2012