fatigue manager wind seminar

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DNV SESAM analysis procedure presentation for fatigue analysis of wind turbine generation foundation

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  • DNV GL 2013 SAFER, SMARTER, GREENER DNV GL 2013

    SesamTM for offshore wind

  • DNV GL 2013

    Offshore wind combining DNV GL competencies

    2

    = +

    40+ years of offshore oil

    & gas experience

    Global leader in risk

    management of

    offshore wind projects

    DNV GL has 25 years

    of hands-on experience

    with wind turbines.

    DNV GL Software

    provides 40+ years of

    offshore oil & gas

    experience.

  • DNV GL 2013

    SesamTM a 40 years success story

    A complete system for strength assessment and sea-keeping analysis of ship and offshore structures

    Used to design ships, offshore fixed and floating structures from shallow waters to ultra deep waters in harsh environments as well as structures supporting wind turbines

    Covers the range from FEED to field abandonment and forms the basis for reanalysis systems in the operational phase

    Documents a safe structure satisfying design standards, statutory regulations and criteria for HSE covers the range from stress evaluations to code checking and fatigue of plates and beams

    More than 170 organisations use Sesam as their preferred tool for structural engineering

    GeniE for structural analysis

    HydroD for hydrostatics and dynamics

    DeepC for SURF, mooring and marine operations

    3

  • DNV GL 2013

    Sesam Wind Modules

    4

    Fatigue Manager FLS

    Sesam Modules used:

    Wajac (hydrodynamics) Sestra (solver)

    Splice (pile/soil)

    Framework (fatigue calculations)

    GeniE Modelling ULS Code-check

    Sesam Modules used:

    Wajac (hydrodynamics) Sestra (solver)

    Splice (pile/soil)

  • DNV GL 2013

    Sesam for other offshore wind related structural analysis

    Design and analysis of

    installation vessels

    Transportation analysis

    Seakeeping and hydrodynamics

    Hydrostatics and stability

    Installation analysis

    Lifting operations

    Through surface effects

    5

  • DNV GL 2013

    6

    Sesam for Fixed substructures

  • DNV GL 2013

    What can Sesam do for Offshore Wind Turbine Installations?

    Design of substructures according to IEC61400-3 /DNV-OS-J101

    Modelling

    Full 3D modelling environment for frame and shell models

    Consider complex transition structure between the wind tower and the supporting structure

    Non-linear structural dynamics of fully integrated system

    Coupled analysis with Wind Turbine

    FE-representation of component

    Pile/Soil

    Wave-structure interaction

    Structural assessment

    Eigenvalue analysis

    Calculation of beam forces and stresses

    Fatigue calculations

    Integrated code-check supporting NORSOK,API, AISC, Eurocode, ISO, DS

    Floating Offshore Wind Turbine

    Simulate offshore wind turbines mounted on arbitrary floaters

    Interaction effects between - and dynamic responses of - all components

    7

  • DNV GL 2013

    Fatigue Manager (Uncoupled)

    Time series of loads

    at interface point.

    Converters from:

    Bladed

    HAWC

    .wind format

    Simple text file.

    time Fx Fy Fz Mx My

    Mz

    8

  • DNV GL 2013

    Jacket, tripod and monopile

    9

    1. Modelling and wave

    load calculation Sesam GeniE

    2. Wind turbine

    design analysis (Bladed, HAWC,

    FLEX, )

    3. Substructure and

    foundation analysis - FLS Sesam Wind

    - ULS Sesam GeniE

    Load calculations Wind turbine design Substructure design

    Load time

    series Properties

    Loads

  • DNV GL 2013

    Sesam Wind - Fatigue Manager imports Bladed Results

    10

    Bladed

    .$25 files with

    Beam Forces and Moments

    Fatigue

    Manager Bladed Converter

    _R1.SIN files

    with structure and results

    Use in Fatigue

    Manager for FLS

    or in GeniE for

    Code-check

  • DNV GL 2013

    Fatigue

    Methodology according to DNV-OS-J101 and DNV-

    RP-C203

    Time-series simulation of wind/wave load

    combinations

    Fatigue calculations by rainflow counting

    Pre-defined or user defined S-N curves and SCFs

    Combined fatigue damage from all wind speed and

    sea states

    Multiple wind speeds and sea states

    Multiple wind and wave headings

    Aligned and unaligned wind and sea

    Printable report for overall results

    Support for beam structures,

    Circumferential and axial welds

    Tubular joints

    11

  • DNV GL 2013

    Fatigue Manager and Sesam Cloud

    Faster

    More complex structures

    More load combinations

    More design iterations

    CPU capacity on demand

    Data storage on demand

    Data security

    12

  • DNV GL 2013

    Ultimate Strength and Code Check

    Code check of beams and joints

    according to international standards

    Eurocode

    NORSOK

    AISC

    API

    Wind and Wave load combination by

    Characteristic loads

    or

    Time series simulation

    Graphical result presentation

    Reporting

    13

  • DNV GL 2013

    Gravity based substructure

    Base shear and overturning moment

    from time series simulation of wave

    loads and imported wind loads

    Modelling

    Full 3D modelling environment for frame

    and shell models

    Loads

    Wave and current loads for slender and

    large volume structures

    Random sea states and non-linear wave

    Hydrostatic and Froude-Krylov pressure

    on exact wetted surface

    Import of wind loads (time series) from

    wind turbine programs

    Structural analysis

    Load transfer to structural model

    14

  • DNV GL 2013

    15

    How can Sesam help you to design floating OWT?

  • DNV GL 2013

    Sima for floating foundation and marine operations

    Sima

    Coupled analysis of floating wind turbines

    Simulate OWT mounted on arbitrary

    floaters

    Interaction effects between - and dynamic

    responses of all components

    Dynamic equilibrium at each time step

    ensured by direct nonlinear time domain

    integration scheme

    Wave load and motion analysis

    Structural analysis

    16

  • DNV GL 2013

    SIMA/RIFLEX model for floating wind turbine

    17

    Non-linear FE-model of entire system:

    Floater: hydrodynamic loads (1st and 2nd order potential wave forces, viscous drag)

    Mooring lines: hydrodynamic loads (generalized Morison load model)

    Tower: wind loads

    All the components: inertia forces, weight and buoyancy.

    Blades: Aerodynamic loads. BEM method (with dynamic inflow) on each element.

    Tower upwind effect on wind field by potential theory approach

    Control system: Blade pitch and electrical torque control algorithms

  • DNV GL 2013

    SAFER, SMARTER, GREENER

    www.dnvgl.com

    18

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