8/3/2019 as # Dimensi Non Linier_Transportasi
Maritim_Chapchap_Alberto
1/1
The aim of the proposed work is to include nonlinearities
associated with
radiation, diffraction and incident waves in three-dimensional
(3D) hydroelasticity
analysis using the so called body-nonlinear approach, namely,
flat and linearized
free surface and the corresponding deformed body. The main
objectives are:
1- To develop the body-nonlinear 3D seakeeping problem, in the
time domain,
using Rankine source distribution, as a preamble to the
extension to 3D
hydroelasticity.
2- To resolve numerical issues associated with accurate
description of the entire
hull surface, detection of the instantaneous free surface,
deformation of the body
(including distortions), time marching scheme and radiation
conditions.
3- To extend (1) to the unified (rigid body motions and
distortions) 3D
hydroelasticity.
4- To verify both seakeeping and hydroelasticity predictions
against available
experimental measurements and other numerical predictions, for a
mono- and a
multi-hulled vessel.
Body Non Linear 3D HydroelasticityAlberto C. Chapchap
[email protected] - School of Engineering Sciences
Ship ScienceSupervisors Professor Pandeli Temarel
FSI Away Day 2010
Fluid Structure Interactions
Research Group
Description and Goal
Problems of interest:
Springing
slamming (whipping)
extreme loads prediction
fatigue assessment
Floating Structures in which the non linear effects can be
relevant:
VLCCs
FPSOs
multihull vessels
ULCS
Offshore Transfer Operations
Figure 1: Comparison between linear andnon linear2D
hydroeslasticity analysisof the heave and pitch motions,
bowacceleration at0.85L, midship bending moment
and shear forces at 0.75L for the S175 container ship travelling
in regular head wavespresented by Park & Temarel (2007).
Figure 2: Slamming and green water loads (upper figure) and a
mesh idealizationof a flexible hull with large distortions
Hydrodynamic description of the exact free surface and body
surface boundaryconditions
Large Amplitude Motion Problem (LAMP) for a rigid body
travelling on the
seaway
Extension of the non linear rigid body f luid interaction model
to a non linearhydroelasticity model
Applications
Future Work
Importance of Non Linear Effects
