Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
ANALYSIS OF HYDRODYNAMIC RESONANT EFFECTS IN SIDE-BY-SIDE CONFIGURATION
Year:2014
Research Areas
  • Mechanical aeronautics and naval engineering
Information
Abstract
Seakeeping behavior of a multibody system in side-by-side configuration in head sea condition is discussed in this paper. The system, which can be assimilated to a FLNG and LNG car-rier during an offloading operation is composed of a barge and a prismatic geosim with two gap values. Seakeeping tests in regular waves have been performed in the model basin of CEHINAV- Technical University of Madrid (UPM). The movements for the geosim were restricted to the surge, heave and pitch motions (on the vertical plane), whereas the barge was kept fixed. In this way the gap remained constant during the tests. Numerical modeling has been undertaken using WAMIT and an in-house time-domain Rankine Panel Method (TDRPM). Response amplitude operators in terms of movements and wave amplitude in the gap obtained from seakeeping test and numerical models are documented in the paper, illustrating the limitation of the numerical codes regarding the modeling of this hydrodynamic problem. Numerical results indicate a resonant behavior of the waves in the gap for a range of frequencies, with amplitudes much higher than those observed during the tests. Due to the small distances considered in the experiments, these resonant waves are related to longitudinal wave modes in the gap. In order to overcome this problem, a procedure for introducing an external damping factor that attenuates the wave amplitude along the gap in the time-domain RPM is evaluated based on the experimental data.
International
Si
Congress
ASME 2014 33rd International Conference on Ocean, Offshore & Arctic Engineering -OMAE2014-
960
Place
San Francisco, California, USA
Reviewers
Si
ISBN/ISSN
978-0-7918-4537-0
doi:10.1115/OMAE2014-23389
Start Date
08/06/2014
End Date
13/06/2014
From page
1
To page
13
Volume 1A: Offshore Technology
Participants
  • Autor: Pasquale Dinoi . (UPM)
  • Autor: A. Watai
  • Autor: H. Ramos-Castro
  • Autor: Jesus Maria Gomez Goñi (UPM)
  • Autor: F. Ruggeri
  • Autor: Antonio Souto Iglesias (UPM)
  • Autor: A. Simos
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: CEHINAV (Canal de Ensayos Hidrodinámicos de la E.T.S.I. Navales)
  • Departamento: Física Aplicada a Las Ingenierías Aeronáutica y Naval
  • Departamento: Mecánica de Fluidos y Propulsión Aeroespacial
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