RAMBOLL OFFSHORE STRUCTURALANALYSIS PROGRAMS

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ROSAP

PROGRAMS FOR ALLSTRUCTURAL PROJECTSA UNIQUELY DEVELOPED SOFTWARE THAT MEETSSTRICT DEMANDS FOR DOCUMENTATION ANDVERIFICATIONThe Ramboll Offshore StructuralAnalysis Programs - ROSAP - havebeen developed over the past 30+years to meet the ever increasingdemands for structural design,optimisation and lifetime extensionof offshore structures. The program development has beendriven in close cooperationwith Ramboll's structural expertsand a team of analysts anddesigners. A further invaluable bondto leading oil and gas operators inthe Danish offshore sector hassecured a focused effort to providehigh standards and offering theright analysis tools to the market.The operators have been activelyinvolved in providing specialistknowledge supported bybackground studies anddocumentation. The ongoing development of theprograms is based on detailedinsight in current market demandsand client needs. This strongposition makes ROSAP a unique,user-friendly and up-to-datedesign tool that can be tailored forany structural project.    

Tools for design, re-assessmentand lifetime extension

ROSAP provide indispensable toolsfor new design, modification workand lifetime extension assessmentsof onshore and offshore steelstructures.The programs provide a completepackage for static and dynamicanalyses of spatial framestructures, covering all phases fromtransport and lifting to in-service.Loads, such as hydrodynamic, wind,constant force and accelerations,are intuitively defined andprocessed according to recognisedtheories and standards.

Tailor-made programs forstructural design needs

The primary programs in ROSAPare:

• ROSA• RONJA• STRECH• TUBJOI• RHSJOI• JOANA• FATIMA 

ROSA is the main finite elementprogram for static and dynamicanalysis and can in combinationwith FATIMA be used for spectral ortransient analysis. 

The advanced program RONJAsupplements ROSA by addingfacilities for non-linear analysis ofstructures with large displacementsand non-linear elasto-plasticmaterial behavior. RONJA iscommonly used for determinationof global failure of structures takingforce redistribution into account inrelation to e.g. ship impactassessments or post damageanalyses. The STRECH program is anessential postprocessor developedfor stress and stability check ofbeam members.The program supports a number ofcodes such as:• API• AISC• NORSOK• ISO • EC3• DS449 TUBJOI, RHSJOI and JOANA arepostprocessors aimed at accurateand automated verification ofcommonly used joint connections.TUBJOI is dedicated to tubular jointconnections typically used in jacketstructures. RHSJOI is tailored fortypical RHS profile connections.JOANA is developed for stress

check of typical joints applied intopside structures. The programsupports, among others, verificationof ring stiffeners, gusset plateconnections and other standardconnection details. The jointverifications made with TUBJOI,RHSJOI and JOANA follow thesame codes as the STRECHprogram. FATIMA is used for fatigue analysisof members and joints. 

Comprehensive applicationperformance

All programs have been used foranalysis of the vast majority ofjackets, topsides, offshore bridgesand risers within the Danish sectorof the North Sea. In addition, severalstudies have been carried out in theMiddle East, UK, US and Norway.  ROSAP have also been used fordesign and documentation of morethan 1,200 individual foundationdesigns for wind turbines for 21offshore wind farms around theworld.  

 

SELECTED REFERENCES

Foundations

• Halfdan B & C (DK), Maersk OilA detailed design of two jacketswith pile foundations • Al Shaheen A (Qatar), Maersk OilDetailed design of tripod jacket • Nini & Cecilie (DK), DONG Energy Detailed design of two tripodjackets 

• Greater Gabbard (UK), FlourDesign of 140 monopiles (windturbine generator foundations) 

Topside and bridges

• Tyra West bridge module (DK),Maersk Oil

FEED and detailed design project ofa 3500 mT module • Nini & Cecilie topsides (DK),

DONG EnergyDetailed design of completetopsides for two cost-effectiveplatforms 

Offshore substations

• Anholt substation (DK),Energinet.dkTopside and jacket detailed design • Westermost Rough substation

(UK), DONG EnergyTopside and jacket detailed design 

FPSO topside

• NEXUS FPSO, Samsung HeavyIndustries

Complete topside design for theNEXUS FPSO. Functionality toaccount for FPSO movements forfatigue and extreme conditions wassuccessfully added to the ROSAPpackage during the project

About us

Ramboll Oil & Gas is a business unitwithin the Ramboll Group. Withmore than 35 years of experience, we are a well-established,independent and highly regardedprovider of offshore and onshoreengineering consultancy servicesfor the oil and gas industry. Wehave offices in Denmark, Norway,Qatar, Abu Dhabi (U.A.E.), US andIndia, and employ close to 1,000specialists.  

More information and contact

Bjørn V. JønssonDirector of Department, MarineStructuresbvj@ramboll.com+45 5161 5321 www.ramboll.com/oil-gas

GET ROSAP IN-HOUSE OFFICIAL VALIDATIONLEFTStructural analysis ofoffshore platformwith ROSAP.  RIGHTComplete platformfor offshore windfarm, designed withROSAP software.

The programs are available as individual or all-inclusivelicenses. Our ROSAP specialists give thoroughintroductions to the programs and assist in the daily useto ensure that our clients get prompt value for moneyand increase effectivity in reporting of results.

 The programs are easily installed and come with 24 houraccess to file servers.

The offshore industry is one of the most controlled andsupervised industries in the world. All industry playersmust live up to the strict demands for third partyverification.

 The design and assessment work performed usingROSAP has been successfully validated by certifyingagencies such as DNV GL, Lloyds and Bureau Veritas.

- INVALUABLE DESIGNROSAP

ROSAP