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An experimental and numerical investigation of a box-shaped object in moonpool; a three-dimensional study

Abstract

The forced heave motion of a dummy ship model with moonpool, including a fixed box-shaped object, was realized experimentally in the Towing tank at MARINTEK. The blockage effect caused by a large object was investigated. Regular and irregular forced heave motions were imposed. In the regular motion tests, four forcing amplitudes, and 11 forcing periods near the piston-mode resonance period were tested. PVC3D (Potential Viscous Code) was used to study the regular heave motion problem numerically. PVC3D is a code developed at MARINTEK, in collaboration with Statoil RDI, which couples a Naviér-Stokes solver with the linear potential flow theory for the free-surface waves. PVC3D has in previous studies proven to be fast, robust and accurate for marine resonance problems. It has not previously been validated for object in moonpool. Here, a validation study is presented. The moonpool response is well predicted by PVC3D both for the case of empty moonpool and moonpool with object. The studied object has a non-negligible blockage effect in resonant condition.

Category

Academic chapter

Language

English

Author(s)

  • Trygve Kristiansen
  • Babak Ommani
  • Kjetil Berget
  • Rolf Jarle Baarholm

Affiliation

  • SINTEF Ocean / Energi og transport
  • SINTEF Ocean / Skip og havkonstruksjoner
  • Equinor

Year

2015

Publisher

The American Society of Mechanical Engineers (ASME)

Book

ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering

ISBN

9780791856475

View this publication at Norwegian Research Information Repository