from ships to offshore platforms and renewable energy

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


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.


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.


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.


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”


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


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


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


HIPOCAS Database (1958-2002)


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


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


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


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


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


Model tests at Force Technology (Sutulo et al 2012)

Validation of hydrodynamic interaction


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


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


Box girder

Gordo & Guedes Soares

Experimental Assessment of Ultimate Strength


Corrosion test set up

Initial

corrosion

Moderate

corrosion

Severe

corrosion

Garbatov &

Guedes Soares


Test laboratory at IST

Experimental assessment of ultimate strength

Simply support

Hydraulic Jack 700 [kN]

Displacement gauges

Supporting arms

Box girder


Properties of corroded steel

Corrosion Science

(in Press)


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)


Low Energy Medium Energy

Thick Specimen

Impact in composites:Typical Damage

Indentation

Imp

act

-Face

Back

-Face

Perforation

High Energy

Thin Specimen


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


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


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


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


Safety in Design –Risk based design

Ref: Risk-Based Ship Design: Methods, Tools and Applications, Springer, 2009


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


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


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


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

from ships to offshore platforms and renewable energy

Documents