SAGA and its mission: Viking Systems core structural assessment software integrates regulatory body requirements by applying world class state-of-the art software managed within one program suite to reliably assess vessels and offshore structures based upon client and project needs & Viking Systems engineering teams all use SAGA allowing us to operate with a strong team spirit anchored in the pride that comes with using a software system that is tailored to the needs of our business and people Viking Systems International, Inc. Annapolis Houston Singapore Palm Beach Tanzania 1
Presentation Overview This presentation is intended to give you a comprehensive view into the extensive amounts of diverse projects done by Viking Systems using a consistent quality approach that is defined and programmed into the SAGA structural naval architecture program: Clients and Projects served over nearly two decades: Oil & Gas (Primarily FPSO and FSO vessels) Military and Defense (Navy, Coast Guard and Patrol Vessels) Commercial (offshore supply, cargo, passenger vessels) Data Flow Charts SAGA Main Features Samples (including foundation complexities) 2
Some of Viking s Clients American Bureau of Shipping (ABS) BP, Chevron, ConocoPhillips, Petrobras, Shell, Cobalt Modec, Sofec, Mitsui Mustang Engineering, Harvest, Sembcorp Marine Tanker Pacific Offshore Terminal (TPOT / OMNI) Design Firms: Oceaneering, Gibbs & Cox, CSC, SAIC, NETSCO, OGI, VARD, Bristol Harbor Group US Shipyards: Commercial, US Navy, US Coastguard Vessels General Dynamics NASSCO, Bollinger Shipyards, Gunderson, Bay Shipbuilding, AKER Philadelphia, Corn Island, Alabama Shipyard (BAE), VT Halter Systems 3
Oil & Gas (FPSO/FSO, etc) BP PSVM Angola FPSO Cendor MOPU Conversion (Malaysia) Chevron Frade FPSO (FEED / 3 rd Party Verification / New Module Install) Chevron Frade FPSO Redevelopment CNR International FPSO Baobab Ivoirien MV10 Cobalt Cameia FPSO (Angola) ConocoPhillips Belanak LPG FSO COTCO FSO Kome Kribi 1 (Esso Chad) ExxonMobil Yoho FSO HESS North Malay FSO Kuito FPSO (ABS) Petrobras UOTE (External Turret) Petrobras FPSO Vidade do Rio de Janeiro MV14 Petrobras FSO Cidade de Macae MV15 Petrobras FPSO Cidade de Niteroi MV18 Petrobras FPSO Cidade de Santos MV20 Petrobras FPSO Cidade de Angra dos Reis MV22 Petrobras FPSO Cidade de Sao Paulo MV23 Petrobras FPSO Cidade de Mangaratiba MV24 Petrobras FPSO Cidade deitaguai MV26 Petrobras Cidade de Caraguatatuba MV27 Petrobras FPSO Cidade de Campos dos Goytacazes MV29 Shell FPSO Fluminense TOTAL Kaombo TOTAL PazFlor (DSME) Tullow Ghana FPSO Kwame Hkrumah MV21 (Jubilee Field) Tullow T.E.N. FPSO Ghana 50+ FEED and Proposal Projects 4
Military and Defense LCS (Austal Trimaran class of Ships) JHSV (Class of Ships) LCS (Lockheed Monohull) FRC (Class of Ships) OPC (Class of Ships) MLP (Class of Ships) LSD-42 (USS Germantown) LSD-43 (USS Ft McHenry) DDG-67 (USS Cole) DDG-60 (USS Paul Hamilton) LHD-6 (USS Bonhomme Richard) FFG-36 (USS Underwood) LPD-18 (USS New Orleans) LSD-47 (USS Rushmore) DDG-51 (USS Arleigh Burke) DDG-52 (USS Barry) DDG-53 (USS John Paul Jones) DDG-65 (USS Benfold) DDG-102 (USS Sampson) CG-66 (USS Hue City) CD-56 (USS San Jacinto) CG-57 (USS Lake Champlain) CG-53 (USS Mobile Bay) CG-54 (USS Antietam) CG-47 Life Extension CG-17 (USS Lake Erie) CG-71 (USS Cape St. George) Indian Navy Patrol Vessel Egyptian Navy Patrol Vessel US Navy Submarine Rescue Vessel Corrosion Modeling of 30+ CG, DDG, LHD, LSD vessels 5
Commercial Project America Cruise Vessel (STX) SeaAmerica Cruise and Conference Vessel (STX) Penn Maritime Barge (Alabama Shipyard) Penn Maritime Asphalt Barge (Alabama Shipyard) Matson CV2600 Containerships (Aker Philadelphia) SeaRiver Tanker (Herbert Engineering) NASSCO T-AKE Tankers (Herbert Engineering) OSG Maritrans Barges Corn Island Shipyard Asphalt Barge Ocean Residences Under Sea Resort Vessel Platform Supply Vessel Sergeant Marine Asphalt Commander Double Hull Conversion VT Halter Marine Barge Projects Gunderson Marine Projects VARD Projects Offshore Supply Vessels Work Boats Other projects 6
Common Software is a big part of our Team Approach! SAGA s development is focused on where there are no viable commercially available quality products available SAGA serves our engineering efforts with a focus on software development to control our quality and schedule We have developed software and methods in SAGA that are required to make: Femap the 3D modeling tool throughout the analysis and assessment process Hecsalv the loading case preparation tool WADAM, Wasim and SAGA Hydro the tools for loads Nastran the stress solver for strength, fatigue and vibration DNV-GL s programs Sestra and Stofat the solution for spectral fatigue calculations LS-Dyna the solution for impact, collision and explosion studies We constantly expand and test our program and provide test samples in each report for reviewer to see 100% compatibility coupled with spreadsheet calculation Viking offices around the world use this same technology in a 30 person user network allowing our team to have a central approach understood by all our teams SAGA Yielding Evaluation Plot Worst Among 100 s of cases 7
SAGA Flow Chart: Hull Strength Assessment for Offshore Vessel (Class Independent) Other Loading Software Supported: DNV-GL Wasim time domain hydrodynamic software, simulating large amplitude loads SAGA Class Rule wave, acceleration and hull girder loading SAGA Hydro for Sinusoidal and Trochoidal waves with Froude-Krylov effects included SAGA Dynamic Load Parameter Tool 8
SAGA Flow Chart: Hull Fatigue Assessment for Offshore Ship (Class Independent) Other Fatigue Software Supported: SAGA Simplistic Fatigue using stress, probability, and Weibull Distribution SAGA Spectral Fatigue using RMS stress and Rayleigh Distribution SAGA Spectral fatigue using custom spectrum analyzer and wave spreading SAGA Fracture using crack growth calculations 9
Structural Naval Architecture - Feature Overview Applied to ships and offshore structures fabricated from steel, aluminum, and composite materials: Finite Element Model creation and mesh checking Translation between Femap, Nastran, Nauticus, Sesam, Ansys, SACS, SafeHull, Veristar, Hecsalv Application of loads from rules or hydrodynamics analysis Balancing of loads in case of a floating structure Assessment of Yielding, Buckling, Fatigue, and Vibration modes Application of structural criteria from major classification society codes, API, AISC Gives our teams the tools to focus on solving the structural problems, ensuring a design is adequate and optimal: Assessment against any number of rules and any number of load cases, with plots showing the maximum response for each structure under design loads Calculation of paint areas, weld lengths, weights, centers of gravity, etc Plotting of results into typical structure groups to easily understand the results & allowing easy access to the data needed to update structure drawings and create reports 10
Structural Naval Architecture - Feature Overview 3-D FEA Modeling Rapid creation of finite element models via import of CAD transverse section data, and ABS ISE Data File formats supported: Autocad.dxf, GHS.gf1, and HECSALV.hul files Supports assembly of models using SAGA in combination with FEA software such as FEMAP, Patran-Pre, or ANSYS Corrosion Modeling feature by groups or gauging mapping Detailed local models generated from global model, using features like nodal section insertion and beam shapesto-plate data extraction Local models are loaded by nodal deflections and rotations, accelerations and pressure loading Loading Analysis, Balancing, and Interfaces to External Programs Grouping of finite elements carried out by SAGA to support naval architecture loading groups; external hull, tanks, deck areas, engine room and other user defined groups Hull groups can be exported in Nastran format for loading by external programs such as WASIM, WADAM, LAMP, or by SAGA using built-in classification society rules SAGA is used to either inertia balance or position balance eliminating boundary condition influence Evaluation of Results SAGA reads stresses from Nastran and from DNV s Sestra program in assessing yielding and buckling requirements of classification societies (ABS, BV, & DNV) SAGA performs advanced post-processing of results by establishment of structural buckling regions in combination with material, property, deflection, and stress data from the finite element model Along with classification society rules of ABS, DNV, BV, and Lloyds, SAGA is capable of additional custom code checks programmed by user via spreadsheet interface 11
Code Compliance Check Feature Overview Viking s structural assessment software, SAGA, is constantly at work on ships and offshore structures, providing design and assessment capabilities on all type of structures, including: FPSO & FSO vessels Jackup offshore installations Navy and Coast Guard vessels Ships and barges Heated cargo Vessels Other ships and floating structures SAGA uses built-in design code checking (yielding/buckling/fatigue) from below regulatory bodies: ABS FPI Rules ABS SVR Rules ABS MODU Rules ABS HSNC High Speed Naval Craft BV Parts A-D and NI593 API RP 2A DNV OS-C101 DNV RP-C201, RP-C203, RP-C205, RP-C206 12
Corrosion Assessment Feature Overview SAGA is used by Viking team members to apply corrosion instructions that have been entered into a database system developed by Viking to manage corrosion gaugings: Location of gauging including tank and coordinates Gauged thickness As built thickness Calculation of corrosion rates for structure groups Implementation of future anticipated corrosion Class required steel renewal calculation Steel renewal at conversion given vessel design life 13
Corrosion Assessment Feature Overview SAGA applies the corrosion values by subtracting the FEA model scantlings: Plate thickness Beam and Bar Element Stiffener web thickness Beam and Bar Element Stiffener flange thickness The model s gauging database is compared and a corroded model is made: As built model and database thicknesses are compared and validity checked Plate thickness and stiffener properties are updated Interpolation options for elements away from gaugings Percentage rule minimum corrosion can be applied Diminution corrosion can be subtracted Resulting FEA Model with as gauged thickness 14
Fracture & Fatigue Cracks Feature Overview SAGA fracture mechanics is used on projects where a standard SN Curve approach is not considered sufficient, such as to estimate time for a crack to grow to a certain size or to become critical. Based upon Paris Law, our approach allows for the evaluation of crack growth of external and internal crack types typically found in ship structures. The loading driving the fatigue stress ranges are defined by a Weibull distribution of a stress range calculated by loading and solving an FEA model. The model program allows us to investigate the effect of: Initial crack length Material strength Residual stress in the structure Compressive stress retardation accounted for Crack retardation models such as Wheeler Shape geometry effects in case of a damaged area SAGA calculates a fracture damage ratio where amount of cycles in a design event is presented as a ratio of amount of cycles to failure. SAGA calculates growth of cracks of varying initial size Damaged areas experiencing cracks can be assessed for safety in operation 15
Riser Support Structure Analysis Upper and Lower RSS Strength & Fatigue Assessments for Spread Moored FPSOs Global RSS Model Mesh Refinement IWO RSS Structure RSS Strength Assessment Plot 16
Mooring Support Structural Analysis MSS Strength & Fatigue Assessment for Spread Moored FPSOs Mesh Refinement IWO Fairlead Structure Global MSS Model MSS Strength Assessment Plot 17
Topside Stool Structure Analyses Stool Strength & Fatigue Assessments Global Deck Sub-Model SAGA iterates on entire deck submodel until slider equilibrium & tracks reactions and deflections SAGA Stool Strength Assessment Plot 18
Model of A-Frame Foundation & Ship Structure Model of A-Frame Foundation & Ship Structure 19
Helicopter Platform Evaluation & Analysis Global Model Deck Structure Deformed Stress Plot Critical Scenario Overall Global Model Loading 20
Mooring Load Verification DEC - Ballasted Condition - My Load RAOs 1000000000 900000000 Amplitude (m/m) 800000000 700000000 600000000 500000000 400000000 300000000 200000000 0 45 67.5 90 112.5 135 150 165 180 100000000 0 0.000 5.000 10.000 15.000 20.000 25.000 30.000 35.000 Period (s) Turret and Mooring Layout within OrcaFlex 21
Results Presentation SAGA prepares results for our clients using a Virtual Reality Modeling Language (VRML) format viewable in standard web browsers and other programs that read VRML, such as Rhino. The result files are available for use by interested clients wishing to see the results in interactive 3D rather than simply as shown in reports. 22
SAGA Samples Buckling Assessment Model Global Modeling and Checking Groups for Loads Application SAGA Wave Loading and Balancing SAGA Loads Solved with Nastran SAGA Spectral Fatigue Assessment 23
Contact Information Lars Henriksen President Lars.henriksen@viking-systems.net Bo Williams Director of Engineering Bo.williams@viking-systems.net Fritz Waldorf Director of Sales and Marketing Fritz.waldorf@viking-systems.net 24