ernest oshogbunu

7/25/2019 Ernest Oshogbunu

1/17

Research Topic:Analysis and Design

Optimisation of

Oshore Wind TurbineSupporting Structures

1

Presentation for common wealth scholarship programmecompiled by Oshogbunu Ernest Onoriode


2/17

Presentation Outline

1!oncept of Wind Turbine andRele"ance

#Research $oti"ation

%Aim of Research&Ob'ecti"es(Present Wor)s So far

*Research +ene,t to $y !ountry-igeria./no0ledge mpact on me

#Presentation for common wealth scholarship programme compiled by oshogbunu ernest onoriode


3/17

!oncept of Wind Turbine andRele"ance

%Presentation

for common wealth scholarship programme compiled by oshogbunu ernest onoriode


4/17

Research $oti"ation 2ndustrialDemand2!hallenge

Present 3nergy Demands4

5igher demand for energy re6uires bigger turbines7 thereby morestructural load on the 0ind turbine supporting structure

5armful 3ect of !O# on the ecosystem4

Global carbon dioxide (CO2) emissions from cement production wereapproximately 82 million metric tons of CO2 (!!"CO2) in 2### about$%&' of global CO2 emissions from fossil fuel combustion and cement

production% "he nited tates is the world*s third largest cement producer+with production occurring in $, states% (!aryland et al+ 2###)

Relating demands perspecti"e to structural integrity4

Deeper depth 0hich re6uires more steel7 thus construction becomeshea"ier Slenderness of the structure in regards to structural responsebecomes a critical design issue

&Presentation for common wealth scholarship programme compiled by oshogbunu ernest onoriode


5/17

8imitations on !odes and Standards

(

Presentation for common wealth scholarship programme compiled by oshogbunu ernest onoriode


6/17

Aim

"he aim of this research is to de-elop simpli.ed e/uations cable ofpredicting the stress0fatigue relationship ( force distributioncorresponding to the fatigue life span ) for the di1erent tubular

oints of o1shore wind turbines supporting structure in order toattain an economical design procedure to present and pre-iousrecognised analysis and design approaches%

Presentation for common 0ealthscholarship programme compiledby oshogbunu ernest onoriode

*


7/17

Research Ob'ecti"es+elo0 is 0ritten the main ob'ecti"es that intend to adopt for my research 0or) incorrespondence to the ad"ice you ga"e to me during the last group presentation41 To identify the design speci,cation limits in present design codes andstandards ;3urocode7 AP and D-=and fatigue resistance of oshore tubular con"entional steel 'oints

# !arry out numerical simulation to e"aluate S!> and fatigue resistance on thecon"entional tubular 0elded steel 'oints in oshore 0ind turbine supportingstructures ;OWTSS= relati"e the structural performance of a detailed model of a

monopile7 tripod or 'ac)et steel foundation and "alidate results 0ith present designcodes and standards% Then7 numerical simulations 0ill be done to e"aluate the S!> and fatigueresistance of con"entional steel 'oints in OWTSS beyond the speci,cationspresently considered by 3urocode7 AP and D-< standards& >urthermore7 in"estigation on mitigating fatigue stress 0ith respect to0elding types 0ould be e?amined to optimise results obtained from numericalsimulation and then de"elop an S- cur"e under the ne0 propose speci,cations

Presentation for common wealth scholarship programme compiled by oshogbunu ernest onoriode.


8/17

Research Ob'ecti"es

( Deri"e simpli,ed design approach 0ith e6uations suitable of predicting andoptimising the S!> and fatigue resistance of the con"entional steel 'oints 0ith ne0speci,cations* Propose suitable steel 'oints con,guration that 0ould be used to furtheroptimise the OWTSS satisfying the conditions4 structural integrity7 aesthetics and

economics. De"elop a maintenance system that is a health monitoring of the steel 'ointta)ing into account S!> during ser"ice stage on basis of the ne0 designspeci,cations obtained from numerical analysis conducted beyond thespeci,cations considered by 3urocode7 AP and D-< standards

@ >urther optimisation considering mitigation of corrosion defects on tubular'oints 0ould be in"estigated on protecti"e measures to sustain OWTSS structuralintegrity for the design life span and li)es 0ise more

Presentation for common wealth scholarship programme compiled by oshogbunu ernest onoriode@


9/17

Present Wor)s 3uantifying 4ind 5oad

0ind turbine soft0are is use to determine the thrust and moments on the bladind turbine

>orce on blade against incident 0ind

Presentation for common wealth scholarship programme compiled by oshogbunu ernest onoriode


10/17

Present Wor)s 3uantifying tresses on E-aluation on "06oint

ell and Solid elements 0ere used to create a T'oint to e?amine the results obt

Shell elements

1BPresentation for common wealth scholarship programme compiled by oshogbunu ernest onoriode


11/17

Present Wor)s 3uantifying tresses on E-aluation on "06oint

ell and Solid elements 0ere used to create a T'oint to e?amine the results obt

Solid elements

11Presentation for common wealth scholarship programme compiled by oshogbunu ernest onoriode


12/17

Present Wor)s 3uantifying tresses on E-aluation on 706oint

1#Presentation for common wealth scholarship programme compiled by oshogbunu ernest onoriode


13/17

Present Wor)s 3uantifying tresses on E-aluation on "06oint (0

beam welded to tubular column)

1%Presentation for common wealth scholarship programme compiled by oshogbunu ernest onoriode


14/17

Research bene,t to $y !ountry -igeria

1&Presentation for common wealth scholarship programme compiled by oshogbunu ernest onoriode

A proer solution to -igeria energy epidemicThe energy epidemic 0ith electricity po0er bac) in -igeria has slo0 do0n the productioncapacity of the nation despite its richness in ra0 energy products Additionally7 thepolitical issue on solely dependence of crude oil for the countryCs main source of re"enueha"e aected the ma'or source of energy supply to the nation and itCsbeen dicult to end the corruption in the crude oil production sector

>acts supporting Proer solution

Less energy consumption in production process compared to coal andcrude oil drilling

Cleaner source of energy for a better eco friendly environment;!onsider the drastic Eoods in the Southern region of the country7 Port5arcourt7 8agos7 +ayelsa7 Warri and the e?treme ele"ated temperatures inthe -orthern region= The health conditions of a fello0 -igerian is at stac)Present the F/ spends billion of pounds trying to build higher shoreline 0allsmore reason they are promoting this research

Availability of Landscape and shore line for such technology The-orthern part of the country has highland 0ith good land breeGe blo0ingfrom the Sahara desert and the South region has a shoreline of the Atlantic

Ocean The land -igeria is blessed7 ha"e to say This technology is applicable where the basic principle is


15/17

Research bene,t to $y !ountry7 -igeria

1(Presentation for common wealth scholarship programme compiled by oshogbunu ernest onoriode

>acts supporting Proer solutions

Rejuvenate of the Nigeria Steel industry >rom my obser"ation7 about @BH to BH0ell engineering structures ;design by a professional= in -igeria and constructed byconcrete7 hardly e"en steel composite structures is seen t can be argued thatcement production emits more co# than steel production Thus7 mitigating the

emission of !O#7 steel manufacturing and design can be encourage and more 0henthe e?perts on such are trained indigenous This 0ould reduce the cost of steelimportation and hiring of steel e?perts for large scale production

mprove the engineering boundaries of Nigeria civil!structural engineers" Thepossible outcome of this research 0ould also be o additional design principle toonshore infrastructures such as long span steel bridges7 long span roof structures in-igeria As "ery e"ery -igerians are proud to be recognised for a 0onderful thing7therefore it 0ould be a glorious 0onder for our engineers design 0orld class ci"ilengineering structures

#itigation of crude oil pipeline vandalism especially in the southern regionof Nigeria" -o doubt7 that it could be con,dently argue that pipeline "andalism 0ouldbe minimal or more eradicated


16/17

/no0ledge mpact On $e

1*Presentation for common wealth scholarship programme compiled by oshogbunu ernest onoriode

Increase my critical thinking of analysing not 'ust engineeringchallenges but also human social challenges7 increasing my dri"e toproer or ma)e solutions to the gap in )no0ledge causing suchchallenges Thus7 increase7 my leadership s)ills

The e?posure to de"elop advance engineering skills inmodelling with sophisticated softwareused by competiti"eresearch and engineering design ,rms in the 0orld

$oreo"er7 0ould acquire systematic skills base on advancelaboratory research equipment'sof 0hich could setup on my

o0n any0here 0hen necessary to proer solution 0ith the basica"ailability of materials since the technical )no0 ho0 is )no0n byme

The research possess me the adept s)ill on oshore rene0able andcoastal engineering 0hich is a dierent area of sub'ect in ci"ilengineering Thus7 0ill be fa"oured to as a structural engineeringto di"ersi,ed my research thin) 0hich ma$es me more grounded


17/17

References 9illingham 6+ :ealy 6+ and purrier 6+ I!urrent and potential use of

high strength steels in oshore structuresJ7 $TD Publication(21B# ;1(=7 S+- [email protected](%%#&1

;odgers 7 6+ and 5ocabrication ofOshore Structures7 +!7 8ondon7 Sept 1%

:ealy 6+ and 9illingham 6+ I5igh strength steels K a "iable option

for oshore designsJ7 3uroforum !onference K 8atest nno"ationsin Oshore Platform Design and !onstruction7 8ondon 1*

$arland7 L4 +oden7 T4 Llobal !O# 3missions from >ossil>uel+urning7!ement $anufacture7 and Las >laring: 1.(1#BBB!arbon Dio?ide nformation Analysis !enter7 Oa) Ridge -ational8aboratory Oa) Ridge7 T-7 #BB% >ound online athttp:22cdiacesdornlgo"2ftp2ndpB%B2globalBBems

Presentation for common wealth scholarship programme compiled by oshogbunu ernest onoriode1.

ernest oshogbunu

Documents