Post on 09-Dec-2021
Centre for Marine Technology and Engineering
Carlos Guedes Soares
From ships to offshore platforms
and renewable energy
NTNU, May 19-20, 2014
Faltinsen and Moan
70 years anniversary seminar and celebration
Centre for Marine Technology and Engineering 2 Faltinsen & Moan Worhshop
Thesis Presented
• Doctor Engineer,
Norwegian Institute of Technology,
University of Trondheim,
Norway, 1984.
“Probabilistis models for load effects
In ship structures”
Dealt with load effect uncertainty
modelling and its effects in the
probabilistic models used for
reliability assessment and code
calibration
Centre for Marine Technology and Engineering 3 Faltinsen & Moan Worhshop
Modeling the Variability of Still water loads
Guedes Soares, C. and Moan, T. Statistical Analysis of Still Water Load
Effects in Ship Structures. Transactions of the Society of Naval
Architects and Marine Engineers (SNAME). 1988; 96(4):129-156.
Centre for Marine Technology and Engineering 4 Faltinsen & Moan Worhshop
Modeling the Variability of Wave Induced loads
Guedes Soares, C. and Moan, T. Model Uncertainty in the Long
Term Distribution of Wave Induced Bending Moments for
Fatigue Design of Ship Structures. Marine Structures. 1991;
4:295-315.
Centre for Marine Technology and Engineering 5 Faltinsen & Moan Worhshop
Reliability Based Code Calibration
Guedes Soares, C. and Moan, T. Uncertainty Analysis and Code
Calibration of the Primary Load Effects in Ship Structures.
Konishi, K Ang A. H-S. & Shinozuka M., (Eds). Structural
Safety and Reliability, IASSAR ; 1985; pp. 501-512.
Centre for Marine Technology and Engineering 6 Faltinsen & Moan Worhshop
Preparing Academic Staff at IST (Phd thesis)
• Garbatov, Yordan (1998), “Reliability of Maintained Ship Structures
Subjected to Corrosion and Fatigue”.
• Fonseca, Nuno M.M.D. (2001), "Hydrodynamics of Motions and
Loads in Ships Induced by Large Amplitude Waves".
• Gordo, José M., (2002), "Ultimate Strength of Ship Structures under
Bending”.
• Ventura, Manuel F., (2005), “Data Modelling of Ship Structural
Components”.
• Teixeira, Angelo P., (2007), “Risk and Reliability based Design of
Marine Structures”.
• Ribeiro e Silva, Sérgio, (2008), “Instabilities of Non-Linear Ship
Motions in Waves”
• Cacho, António J. Cruz, (2010), “Distributed Virtual Environments for
the Simulation and Monitoring of Maritime Traffic”
Centre for Marine Technology and Engineering 7 Faltinsen & Moan Worhshop
Supervision of Phds
Phds on Wave Modelling 6
Phds on Dynamics and Hydrodynamics 8
Phds on Hydrodynamics and Control 3
Phds on Marine Structures 7
Phds on Safety and Reliability 7
Phd on Maritime Transportation 2
TOTAL: 14 Portuguese & 19 Foreign
Centre for Marine Technology and Engineering 8 Faltinsen & Moan Worhshop
Creation and development of CENTEC
The Unit of Marine Technology and Engineering was created in 1994/95
with 3 Phd researchers and 3 main research lines:
Design and Reliability of Ocean Vehicles and Structures
Optimal Design and Control of Structures and Mechanical Systems
Queueing Systems and Quality Management
In 2007, the name of the Unit was changed to Centre (CENTEC) and it
was reorganised in 4 Research Groups:
Marine Environment,
Marine Dynamics and Hydrodynamics
Marine Structures
Safety, Reliability and Maintenance
In December 2013 had 91 Researchers (45 Foreign) from which
44 PhD’s (15 Academics) and 41 PhD students
Centre for Marine Technology and Engineering 9 Faltinsen & Moan Worhshop
Research interests related with waves
Modelling double peaked spectra
Long-term and extreme probability distributions
Identification, analysis and modelling abnormal waves
Wave hindcast and generation of long-term databases
Assessment of wind and wave energy resources with numerical tools
Centre for Marine Technology and Engineering 10 Faltinsen & Moan Worhshop
HIPOCAS Database (1958-2002)
Centre for Marine Technology and Engineering 11 Faltinsen & Moan Worhshop
FORECASTING SYSTEM
Wave generation model WAM
Wave model SWAN
SWAN model high resolution areas
MM5 model high resolution grids
Regional atmospheric model MM5
Global atmospheric model GFS (NCEP)
Sines
Leixões
The Tagus estuary and Lisbon
Centre for Marine Technology and Engineering 12 Faltinsen & Moan Worhshop
Research interests related with ship motions
Large amplitude non-linear vertical motions
Motions of flooded ships
Parametric roll
Ship slamming
Maneuvering in waves
Maneuvering in shallow waters
Interaction between ships and between ship and banks
Centre for Marine Technology and Engineering 13 Faltinsen & Moan Worhshop
Experimental program carried out at the seakeeping
laboratory of the El Pardo Model Basin (Madrid)
- Model 4.4m long
- Hull sectioned at Lpp/4
and Lpp/2, from the bow
Nonlinear Seakeeping -Validation
Fonseca and Guedes
Soares, 2004 a,b
Centre for Marine Technology and Engineering 14 Faltinsen & Moan Worhshop
Existing measured wave traces including abnormal waves, and
calculate the ship responses to these wave traces using the nonlinear
seakeeping code
50 100 150 200 250t(s)-2E+006
-1E+006
0E+000
1E+006
M5 K
Nm
)
VBM at midship
Vertical Bending Moment
A methodology was developed to calculate the exciting forces
induced by deterministic wave traces with abnormal waves
Seakeeping in abnormal or freak waves
Centre for Marine Technology and Engineering 15 Faltinsen & Moan Worhshop
Numerical Example
Turning manoeuvre in waves: Trajectories
Transfer, m
Ad
va
nce
,m
0 500 1000-200
0
200
400
600
800
1000
1200
Wave: height 3m, length 220m
Transfer, m
Ad
va
nce
,m
0 500 1000-200
0
200
400
600
800
1000
1200Wave length 90mWave height 3mPropagation angle 45deg
Manoeuvring in Waves – Sutulo & Guedes Soares
Centre for Marine Technology and Engineering 16 Faltinsen & Moan Worhshop
Model tests at Force Technology (Sutulo et al 2012)
Validation of hydrodynamic interaction
Centre for Marine Technology and Engineering 17 Faltinsen & Moan Worhshop
The deep water offshore wind turbines are generally floating structures and are
placed in more than 60m water depth. The floating wind turbines in deep water
fall into four main categories
Spar-type,
Tension Leg Platform (TLP) type,
Pontoon or barge-type
Semi-submersible type
Deep water foundation
Offshore wind turbine
Spar-type TLP Barge-type Semi-submersible type
Centre for Marine Technology and Engineering 18 Faltinsen & Moan Worhshop
Research interests related with structures
Ultimate strength of plates and girders
Ultimate strength of damaged structures
Fatigue assessment
Impact and collision studies
Impact strength of composites
Mechanical behaviour of composite plates
Strength of corroded structures
Centre for Marine Technology and Engineering 19 Faltinsen & Moan Worhshop
Box girder
Gordo & Guedes Soares
Experimental Assessment of Ultimate Strength
Centre for Marine Technology and Engineering 20 Faltinsen & Moan Worhshop
Corrosion test set up
Initial
corrosion
Moderate
corrosion
Severe
corrosion
Garbatov &
Guedes Soares
Centre for Marine Technology and Engineering 21 Faltinsen & Moan Worhshop
Test laboratory at IST
Experimental assessment of ultimate strength
Simply support
Hydraulic Jack 700 [kN]
Displacement gauges
Supporting arms
Box girder
Centre for Marine Technology and Engineering 22 Faltinsen & Moan Worhshop
Properties of corroded steel
Corrosion Science
(in Press)
Centre for Marine Technology and Engineering 23 Faltinsen & Moan Worhshop
Laboratory of Marine Structures (CENTEC)
Quasi-static Tests: Hydraulic cylinder + Displacement transducer
Load Cell (50 kN)
Small-scale specimens
(length 400 mm)
Load Cell (80 ton)
Larger specimens
(1.5 x 1.5 m)
Centre for Marine Technology and Engineering 24 Faltinsen & Moan Worhshop
Low Energy Medium Energy
Thick Specimen
Impact in composites:Typical Damage
Indentation
Imp
act
-Face
Back
-Face
Perforation
High Energy
Thin Specimen
Centre for Marine Technology and Engineering 25 Faltinsen & Moan Worhshop
Research interests related with Safety
Structural reliability of ships and offshore platforms
Corrosion modelling
Reliability based maintenance and inspection planning
Modeling effects of human factors in ship accidents
Occupational safety
Simulation of maritime transportation operations
Centre for Marine Technology and Engineering 26 Faltinsen & Moan Worhshop
Reliability of the Hull Girder
EU Project SHIPREL A formulation for reliability formulation of the ultimate strength of
the hull girder under longitudinal bending was developed
It was finally adopted in the Common Structural Rules in 2006
Centre for Marine Technology and Engineering 27 Faltinsen & Moan Worhshop
Reliability Analysis of FPSO Hulls Subjected to
Combined Sea States
A.P. Teixeira and C. Guedes Soares
September, 2004
Centre for Marine Technology and Engineering 28 Faltinsen & Moan Worhshop 28
Stage 3
Coating
effectiveness
period
Particles through the coating
Stage 2Stage 1
(mm
)
Co
rro
sio
n d
ep
th
d
Penetration of the water
monolayer oxide film
Formation of the 2D
t
3D oxide nuclei
Start and growth of
Time (Years)
Corrosion model
Centre for Marine Technology and Engineering 29 Faltinsen & Moan Worhshop
Case Study: GSPN’s with predicates as a support for MCS
PDC estimation one repair team for the system (48 h of mobilization)
Petri net (GRIF) of the mobilization-
demobilization of the corrective
maintenance team
Failure counter (GRIF)
Petri net (GRIF) of the functioning – failure – corrective
maintenance of the components 1 & 2
Centre for Marine Technology and Engineering 30 Faltinsen & Moan Worhshop
Safety in Design –Risk based design
Ref: Risk-Based Ship Design: Methods, Tools and Applications, Springer, 2009
Centre for Marine Technology and Engineering 31 Faltinsen & Moan Worhshop
Methodology for accident analysis Focus on Human Factors
AE1
AE2
AE3 AE4 AE6TE1
AE5
TE2
CF1 CF2
BC1...n
BCn-1...n
CF1
BCn-3...n
CollisionFire
Time
Accident event type Parameters
Hazardous material Material, Location, How, Type of Failure
Environmental parameters Type of phenomena, Effect
External Agent Type of agent, How, Cognitive process affected, Task affected
Equipment failure System involved, Location, How, Type of Failure
Human parameters Function, Task affected, Mode of Performance, Type of error
Types of accidental events
Centre for Marine Technology and Engineering 32 Faltinsen & Moan Worhshop
Recent research interests related with Renewables
Assessment of wave energy resources with numerical wave models
Assessment of wind energy resources with atmospheric models
Dynamics of wave and wind energy platforms
Structural analysis (fatigue) of fixed wind turbines
Maintenance planning for offshore wind farms
Centre for Marine Technology and Engineering 33 Faltinsen & Moan Worhshop
Comparing the main subject areas with Torgeir Moan
Much research work was in similar topics but in a different time frame
In 1981-84 the main interest of Torgeir Moan was probably offshore
structures moving later to ship and then to renewable energies
My route started from ships with later incursion in deepwater offshore
platforms and more recently on renewables
Centre for Marine Technology and Engineering 34 Faltinsen & Moan Worhshop
Interactions with Odd Faltinsen
In 1981-84 I did some a special project on ship slamming under his
guidance which started me in this subject that I only could look again
around 1998 and more recently, using his experimental works for
validations.
Much of the work done in ship motion were extensions of the Salvesen
Tuck & Faltinsen ship motion theory
Centre for Marine Technology and Engineering
Carlos Guedes Soares
From ships to offshore platforms
and renewable energy
NTNU, May 19-20, 2014
Faltinsen and Moan
70 years anniversary seminar and celebration