seminar nov 2010 - ansys · pdf fileseminar –nov 2010 ... –fully integrated...
TRANSCRIPT
© 2010 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary© 2010 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary
Steve Varnam
Richard Mitchell
ANSYS UK
Seminar – Nov 2010
Engineering Simulation
Software for the Offshore,
Marine and Wave/Tidal
Renewable Energy Industries
Structural Mechanics
© 2010 ANSYS, Inc. All rights reserved. 2 ANSYS, Inc. Proprietary
Agenda
• ANSYS Heritage in Offshore Structural Analysis
– ANSYS ASAS
• Analysis of Offshore Structures in our
mainstream software
– ANSYS Mechanical
• Addressing the next generation of structural
analysis requirement
– ANSYS Workbench
• Fatigue
• Composites
• Optimisation
© 2010 ANSYS, Inc. All rights reserved. 3 ANSYS, Inc. Proprietary
ANSYS Offshore Solutions
- proven for Oil & Gas applications
• ANSYS® ASASTM
– Offshore Structural FE Analysis
– Coupled wave/current/wind-structure interaction with
nonlinear structural response
– Fatigue assessment with irregular waves and using
deterministic and spectral methods
• ANSYS® AQWATM
– Fully Integrated Multi-body Hydrodynamic and Motion Analysis
– Mooring, stability, vessel motions in regular and irregular waves
• within time and frequency domain
• with coupled cable dynamics
• with forward speed
• Since 1971, AQWA & ASAS have been developed for analyzing a large
variety of oil & gas offshore structures
– WS Atkins Century Dynamics ANSYS
cargo lowered onto vesselshielding
© 2010 ANSYS, Inc. All rights reserved. 4 ANSYS, Inc. Proprietary
AQWA & ASAS Overview
- Main Application Areas
• Offshore Structures– Fixed
• Steel Jackets
• Concrete
– Compliant
• Jack-ups
– Floating• FPSOs
• SPARS
• Semi-Submersibles
• Tension Leg Platforms
– Risers
– Offshore Wind Turbines
• Harbours
• Ships– Design
– Offloading
Images courtesy of Arup, Moss Maritime AS, Technip Offshore Finland and REpower Systems AG
© 2010 ANSYS, Inc. All rights reserved. 5 ANSYS, Inc. Proprietary
ASAS
- Typical Applications
• Some example applications
Courtesy of REpower Systems AG
Courtesy of Fraunhofer CWMT
Offshore Wind Turbines
Jacket Structures
Transportation of Spar Truss on Heavy Lift VesselCourtesy of Technip Offshore Finland
Tidal Turbine Structure
© 2010 ANSYS, Inc. All rights reserved. 6 ANSYS, Inc. Proprietary
ANSYS ASAS
- Relevance for Offshore Renewables
• For more than 30 years, (ANSYS) ASAS has been successfully used
for analyzing a large variety of offshore structures subjected to
wave, current and wind loading
– More than half of all North Sea jacket structures have been designed with the
aid of ASAS
• CAE requirements for Offshore Renewables are very similar:
– Variety of foundations ranging from concrete gravity-based to steel jackets
– Combined wave, current and wind loading – incl. spectral fatigue
– Variety of local joint flexibility for tubular joints
– Seismic loading
– Soil-pile-structure and soil-pile interaction
– Range from shallow to deep water conditions
– Member and Joint Code Checking (e.g., API RP2a-WSD 21st Ed.)
© 2010 ANSYS, Inc. All rights reserved. 7 ANSYS, Inc. Proprietary
ANSYS ASAS
- in a nutshell
• Offshore/Marine Structural Finite Element Analysis
• Coupled wave/current/wind-structure interaction with nonlinear structural response
• Linear and non-linear analysis
– Comprehensive modeling capabilities for frame structures
– Extensive library of Finite Elements
– Multi-level superelement capability
– Frequency domain or time history dynamic analysis
• Fatigue assessment with irregular waves and using deterministic and spectral methods
• Seismic loading using response spectrum technique
• Comprehensive Code Checking for Framed structures - AISC and API (working stress and LRFD), NORSOK, BS5950 and DS449.
© 2010 ANSYS, Inc. All rights reserved. 8 ANSYS, Inc. Proprietary
ANSYS ASAS
- Coupled Wave-Structures
• Coupled hydro-elastic analysis for tubular framed structures
– Fully coupled hydrodynamic loading with non-linear analysis capability
– Automatic computation of hydrodynamic damping
– Regular and irregular waves
– Ability to take RAO results as time history loading
– Tube-in-tube contact
• Wave loading for application of Morison
forces (coupled for non-linear analyses)
• Calculation of added mass due to
marine growth
• Hydrodynamic mass calculations
• Buoyancy calculations, including
free flooding
© 2010 ANSYS, Inc. All rights reserved. 9 ANSYS, Inc. Proprietary
ANSYS ASAS
- Wind, Wave & Current Loading
• Coupled wave/current/wind-structure interaction with nonlinear
structural response
– Capability to handle compliant structures with regular & irregular waves
– Wave theories include:
• Conventional waves such as linear wave (Airy), solitary wave (Cnoidal 1st), Stokes
5th order, Stream function but also Shell New Wave (dispersive wave)
• Irregular waves such as JONSWAP, Pierson-Moskovitz, user-defined
• API Wave recipe
– Current theories include:
• API WSD 20th Ed. and LRFD 1st Ed. codes of practice!
© 2010 ANSYS, Inc. All rights reserved. 10 ANSYS, Inc. Proprietary
ANSYS ASAS
- Soil-Pile-Structure Interactions
• Capabilities– Single pile or pile group analysis
– Soil-pile-structure interaction with single piles or pile groups
– No limit to number of piles or soil layers
– Piles may have non-constant cross sections
– Automatic sub-division of piles taking into account changes in cross section, soil layers, etc.
– Automatic calculation of Mindlin coefficients for group pile analysis
– Automatic generation of lateral forces (P-Y) and skin friction (T-Z) curves
– Efficient nonlinear solution for soil-pile-structure interactions via superelement (sub-structuring) approach
– Non-tubular cross sections
© 2010 ANSYS, Inc. All rights reserved. 11 ANSYS, Inc. Proprietary
ANSYS ASAS
- Code Checks
• Joint Code & Member Code checks including:
– AISC 10th edition working stress and 2nd edition LRFD
– API RP2a-WSD 21st edition working stress
– RP2A-LRFD 1st edition
– BS5950 part 1 1992
– NORSOK 2000
– NORSOK NS3472 1984
– NPD 1992
– DS449 1984 (with 1994 amendments)
– DS412 1984 (with 1994 amendments)
– ISO 19902 implementation started
• Easy-to-use code check facilities including:
– Code checks on time histories
– Code checks on combined load cases
– Visualization of code checks
– Ability to use them in combination with ANSYS calculations
© 2010 ANSYS, Inc. All rights reserved. 12 ANSYS, Inc. Proprietary
ANSYS ASAS
- Fatigue Assessments
• FATJACK module offers both deterministic and spectral fatigue
capabilities
– for tubular frame structures subjected to waves and current or wind including
wind gusts
– can be used in frequency and time domain
– sea states: JONSWAP, Pierson-Moskovitz, Occhi-Hubble, Scot-Weigel and
Shell New Wave, or user-defined wave spectra
• FATJACK includes explicit SCF definitions
– SCFJ – if crown & saddle SCF is known e.g. from empirical formulae
– SCFA – if SCF is known at specific locations e.g. from FE
– SCFB – if SCF is constant across a section
– SCFP – if SCF values vary with location
• Automatic (empirically derived) SCF definitions based on
– Efthymiou, Wordsworth, Kuang or DS449
© 2010 ANSYS, Inc. All rights reserved. 13 ANSYS, Inc. Proprietary
ANSYS ASAS
- Fatigue Assessments
– It is possible to use results from up to 1000 different transient dynamic analyses and loading (i.e., multi-directional wave spectra)
– Uses Rainflow counting method to produce stress range histogram
• Rainflow counting fatigue
– Reduces spectrum of varying stress into simple stress reversals
– Allows the application of Miner’s rule to assess fatigue life of structure
subject to complex loading
– Based on ASTM E1049-85 (2005) Standard Practices for Cycle
Counting in Fatigue Analysis
© 2010 ANSYS, Inc. All rights reserved. 14 ANSYS, Inc. Proprietary
ANSYS ASAS
- Fatigue Assessments
– Within the fatigue (FATJACK) module these results can be combined using a probabilistic based Rainflow Counting approach
– Output includes: • fatigue life (based on Miner´s rule)
• usage factors
• damage per wave (history)
• stress histograms
– Results are stored for further processing (e.g. ASAS Visualizer)
• Rainflow counting fatigue
© 2010 ANSYS, Inc. All rights reserved. 15 ANSYS, Inc. Proprietary
ANSYS ASAS
- Wind/Wave/Current & Rotor Blade Loading
Interface to FLEX5
• FLEX5 is one of a number of highly specialized
wind loading programs
– thoroughly validated for wind turbines
– however, limited to simple substructures
• This limitation can be overcome by combining FLEX 5 with ANSYS ASAS– Simplified substructure (in FLEX 5) can be replaced by a
realistic structural model (in ANSYS ASAS) that can accurately model the structural behavior and wave loading
• This capability was initiated, sponsored and verified by REpowerSystems AG
© 2010 ANSYS, Inc. All rights reserved. 16 ANSYS, Inc. Proprietary
ANSYS ASAS
- Wind/Wave/Current & Rotor Blade Loading
• Allows complex substructure
modelling for offshore wind turbines
• Fatigue and extreme condition design
• Analysis process:
– ASAS(NL) generates FLEX 5
substructure input model data.
– FLEX 5 performs WT analysis
– ASAS(NL) reads the FLEX 5 results and
adds wave load to extract member
forces.
– ASAS performs fatigue analysis via
rain-flow counting.
• It has been successfully applied for
the certification of the Beatrice wind
farm demonstrator project, and others
(e.g., 150MW Ormonde wind farm).Photo courtesy of REpower Systems AG
Interface to FLEX5
© 2010 ANSYS, Inc. All rights reserved. 17 ANSYS, Inc. Proprietary
Impact of substructure on tower bottom fatigue loads
With Waves
90%
95%
100%
105%
110%
115%
120%
125%
130%
135%
140%
Shear long. Shear lat. Vertical
force
Bending
lat.
Bending
long.
Torsion
OJQ
CCT
FFT
With Wave Loading
Why is this (integrated) Loading Combination Important?
ANSYS ASAS
- Wind/Wave/Current & Rotor Blade Loading
Global
Natural
Frequencies
OWEC
Jacket
Quattropod
Centre
Colum
Tripod
Flat Face
Tripod
f0 [Hz] 0.33 0.26 0.3
f1 [Hz] 1.64 1.35 0.86
Court
esy o
f R
Epow
er
Syste
ms A
G
Influence of Substructure on Tower Bottom Fatigue Load
Without Wave Loading
Increase of Fatigue Loads up to 35%!
© 2010 ANSYS, Inc. All rights reserved. 18 ANSYS, Inc. Proprietary
Why is this (integrated) Loading Combination Important?
ANSYS ASAS
- Wind/Wave/Current & Rotor Blade Loading
Court
esy o
f R
Epow
er
Syste
ms A
G
• For local problems it is even more important.
– Local eigenfrequency is blade mode (flap wise direction)
– Bracings in one of the lower bays are also part of this local mode shape
• The highest loading on bracings is the out-of-plane bending moment due to waves.
© 2010 ANSYS, Inc. All rights reserved. 19 ANSYS, Inc. Proprietary
ANSYS Mechanical FEA Suite
• Founded in 1970, ANSYS have been
developing generic Mechanical FEA software
for 40 years
• Originally developed for the nuclear industry,
quality was paramount in its design, now
in accordance with ISO quality controls
• ANSYS FEA has the broadest range of
capabilities in the market-place, with
technologies for:
– Linear & Nonlinear (geometric/material)
analyses
– Static, frequency-domain & time-domain
– 0-D to 3-D elements
– Isotropic, anistropic, layered materials
– ....
© 2010 ANSYS, Inc. All rights reserved. 20 ANSYS, Inc. Proprietary
ANSYS Mechanical Applications
• Offshore Structures
• Pipelines and Risers
• Tubulars, connectors
• BOPs
• Pressure vessels
• Seals
• Hulls
• Etc….
Courtesy of Delta Marine Engineering Company
© 2010 ANSYS, Inc. All rights reserved. 21 ANSYS, Inc. Proprietary
ANSYS Mechanical Solutions
ANSYS Mechanical solutions articulates the best in class CAE
products and technology for structural, thermal, acoustics
and coupled physics analysis that offers a unique class of
integrated simulation solution for the entire product
development process …
© 2010 ANSYS, Inc. All rights reserved. 22 ANSYS, Inc. Proprietary
Product Offering/Target Users
• Built upon robust technology offers a range of products with a clear upgrade path from designers to
analyst.
ANSYS
Professional
PlanDrafting
CAD
Concept
Simulation
Virtual
Prototyping
Advanced
AnalysisEvaluate Production
ANSYS
DesignSpace
ANSYS
Structural
ANSYS
Mechanical
ANSYS
DesignSpace
Mid-RangeFront End High-End
ANSYS
Professional
ANSYS
Structural
ANSYS
Mechanical
ANSYS
Multiphysics
Functi
onality
/Pri
ce
© 2010 ANSYS, Inc. All rights reserved. 23 ANSYS, Inc. Proprietary
Product/Technology Description
ANSYS
DesignSpace
ANSYS
Structural
ANSYS
Professional NLT
ANSYS
Mechanical
Linear Structural
Steady State Thermal
Linear Structural
Steady State Thermal
Transient Thermal
Linear Dynamics
Linear Structural
Non-Linear Structural
Linear Dynamics
Nonlinear Dynamics
Linear Structural
Non-Linear Structural
Linear Dynamics
Nonlinear Dynamics
Steady State Thermal
Transient Thermal
Acoustics
Direct Coupled
Solver Technology
ANSYS
Professional NLS
Linear Structural
Steady State Thermal
Nonlinear Structural
Linear Dynamics
© 2010 ANSYS, Inc. All rights reserved. 24 ANSYS, Inc. Proprietary
Analysis Methods & Solvers
Technology Components
• Elements & Materials
• Contact Analysis
• Nonlinear Analysis
• Solver Technology
© 2010 ANSYS, Inc. All rights reserved. 25 ANSYS, Inc. Proprietary
Analysis Methods & Solvers
Elements Technology
Solid Elements
2D Quad/Tri
3D – Hexa/Tetra/Wedge/Pyramid
Layered Solids
Solid Shell
Beam Elements
Multi material beam analysis
Beam Cross Section Definition
Shell Elements
Lower/Higher Order
Layered Shells
Special Elements
Rebars/Reinforcements
Links/Pipes/Springs
Cohesive Zone
User Elements
Gaskets
© 2010 ANSYS, Inc. All rights reserved. 26 ANSYS, Inc. Proprietary
Analysis Methods & Solvers
Materials Modeling
Material Models
Isotropic/Orthotropic Elasticity
Hyperelasticity
Plasticity
Viscoelasticity
Viscoplasticity
Creep
Other Models
Cast Iron Plasticity
Drucker-Prager
Shape Memory Alloy
USERMAT
Gasket Material
Concrete
Gurson DamageGasket Material
Hyperelastic Material
© 2010 ANSYS, Inc. All rights reserved. 27 ANSYS, Inc. Proprietary
Analysis Methods & Solvers
Contact Analysis
• Node-Node; Node-Surface; Surface-Surface; Line-Line; Line-Surface
• Small and Large Sliding
• Lower and Higher order elements
• Pure Penalty; Augmented Lagrange; Pure Lagrange; MPC contact
• Semi-Automatic Contact Stiffness Update
• Multiphysics Contact; Rigid Contact
• Friction Sliding (Small/Large Deformation)
• Shell/Beam Thickness Effects
• Contact Manager Wizard
• Automatic Assembly Contact
© 2010 ANSYS, Inc. All rights reserved. 28 ANSYS, Inc. Proprietary
Umbillical Analysis
• Geometry built in DesignModeler:
– Core tubing
– 6 helical tubes wrapped around core
– External insulation
• Loads:
– Bent to 36’ radius
– Hydrostatic loads
– End tension
– Gravity
© 2010 ANSYS, Inc. All rights reserved. 29 ANSYS, Inc. Proprietary
Threaded Connector
• 2D Axisymmetric
model created from
parasolid model
– 9.3e-3” interference
• Loads:
– 10 ksi internal
pressure
– 10,000 lb axial load
© 2010 ANSYS, Inc. All rights reserved. 30 ANSYS, Inc. Proprietary
Barge Analysis
• Partial deck model
• Maximum load-spreading reaction applied to patches
• Deflections are less than 0.192” in (5 mm) at any point
© 2010 ANSYS, Inc. All rights reserved. 31 ANSYS, Inc. Proprietary
Explicit - Impact
© 2010 ANSYS, Inc. All rights reserved. 32 ANSYS, Inc. Proprietary
Explicit – Explosion
© 2010 ANSYS, Inc. All rights reserved. 33 ANSYS, Inc. Proprietary
Explicit - Explosion
© 2010 ANSYS, Inc. All rights reserved. 34 ANSYS, Inc. Proprietary
Model all aspects of the design
• From the topsides.....
.. ....to the drill bit
Courtesy of Pluere
Courtesy of AKERE Energy, CA
© 2010 ANSYS, Inc. All rights reserved. 35 ANSYS, Inc. Proprietary
ANSYS Workbench
• Being part of the ANSYS Workbench
infrastructure opens up several
enhancements in overall process for the
structural mechanics users
– Geometry
– Meshing
– Post-processing
– Reporting
– Process scripting & chaining
– Automatic Project updates
© 2010 ANSYS, Inc. All rights reserved. 36 ANSYS, Inc. Proprietary
ANSYS Workbench
© 2010 ANSYS, Inc. All rights reserved. 37 ANSYS, Inc. Proprietary
ANSYS Structural Mechanics
• Geometry
– Direct CAD Links
• Connect to real CAD models
and create true parametric
analysis
– Create analysis geometry
• Geometry clean-up
• Simplification
• Create Shell & Beam
geometry
– Work with imported files
© 2010 ANSYS, Inc. All rights reserved. 38 ANSYS, Inc. Proprietary
ANSYS Structural Mechanics
• Preprocessing
• Materials
• Linear-Elastic
• Plastic
• Hyper-elastic
• Creep
• Soils, Concrete
• Damage models
• Meshing
• From fully automatic to highly controlled
• Loads
• Imported data fields
• Time dependant
• Complex systems
• Contact
• Model real assemblies
• Bonded, Frictionless & Frictional contact
© 2010 ANSYS, Inc. All rights reserved. 39 ANSYS, Inc. Proprietary
ANSYS Structural Mechanics
• Solving
• ANSYS solver technology
evolving to keep pace
with PC developments
• Multi-core
• 32 & 64 bit
• Clusters
• GPU
© 2010 ANSYS, Inc. All rights reserved. 40 ANSYS, Inc. Proprietary
ANSYS Structural Mechanics
• Postprocessing
• Stress, Strain, Creep,
Contact, Reactions
• Linearisation
• Images
• Tabular data Excel
• Movie files
• Automated report
generation
© 2010 ANSYS, Inc. All rights reserved. 41 ANSYS, Inc. Proprietary
ANSYS Structural Mechanics
• ANSYS Structural analysis
© 2010 ANSYS, Inc. All rights reserved. 42 ANSYS, Inc. Proprietary
DesignXplorer
• Start with a workbench defined process
– Use parameters in:
• CAD
• DesignModeler
• SpaceClaim
• Engineering data
• Preprocessor
• Postprocessor
• Derived parameters
– Define design envelope• Parameter limits
• Descrete/continuous
– Define goal• Near target
• Min/Max
• Trade offs
© 2010 ANSYS, Inc. All rights reserved. 43 ANSYS, Inc. Proprietary
DesignXplorer
• DOE
– Select DOE type
– Custom + Sampling (OSF)
• Candidate designs
• Response surface
• Six Sigma analysis
– Manufacturing best/worst case
© 2010 ANSYS, Inc. All rights reserved. 44 ANSYS, Inc. Proprietary
ANSYS Composite Prep/Post
• Composite materials
– Light
– Strong
– Good corrosion resistance
• Complex manufacturing
– Multiple materials
– Multiple directions
Composite examples
Simple geometry's easy to handle
© 2010 ANSYS, Inc. All rights reserved. 45 ANSYS, Inc. Proprietary
ANSYS Composite Prep/Post
• Take loaded FE model from
ANSYS Mechanical
• Build model as manufactured
– Ply by ply manufacture
– Draping
– Section cuts
• Use proven ANSYS FEA solver
• Post process using composite
criteria
© 2010 ANSYS, Inc. All rights reserved. 46 ANSYS, Inc. Proprietary
ANSYS Composite Prep/Post
• Composite specific
post processing
– Layer by layer
– User selected failure
mechanisms
– User defined failure
criteria
© 2010 ANSYS, Inc. All rights reserved. 47 ANSYS, Inc. Proprietary
ANSYS nCode DesignLife
• Premier fatigue analysis tool
• Analyze implications of repeated,
fluctuating, and rapidly applied loads,
which can result in failure or damage• Stress-Life (single, multi-curve, Haigh diagrams)
• Strain-Life (automated multi-axial corrections)
• Multi-axial safety factor (Dang Van)
• Seam welds and spot welds
• High temperature fatigue
• Vibration fatigue (shaker simulation)
• Multiple runs in a single analysis
• Complete duty cycles
• Multi-processor enabled for fast results
• Use Python for proprietary or custom methods
© 2010 ANSYS, Inc. All rights reserved. 50 ANSYS, Inc. Proprietary
Offshore Structures – ANSYS
Product Roadmap
• Transfer of ASAS unique solver technology to ANSYS
Structural Mechanics products
– Single FE product suite
– Recognition of ASAS key features
• Creation of a Design Assessment system to handle
post-processing of analysis results
– Delivered as part of Structural Mechanics products
– For offshore related use, this covers load case
combinations and code checking
• Additional Products
– Separate Code Checking and Fatigue Products
© 2010 ANSYS, Inc. All rights reserved. 51 ANSYS, Inc. Proprietary
ANSYS Workbench
• The vehicle for integration of ASAS
capabilities into our mainstream FEA product
is the ANSYS framework called Workbench
• Workbench acts as a common environment
for all of our mainstream products –
structures, fluids, thermal, electronics
electromagnetics .....
• It enables us to interface software modules
directly without going through intermediate
files and manual processes
© 2010 ANSYS, Inc. All rights reserved. 52 ANSYS, Inc. Proprietary
ASAS to Mechanical
- Beams and Wave Theories
• Beam Post-Processing
enhancements
– Shear Force and Bending
Moment diagrams
• Beam End-Releases
• Wave Theories Added
(Mechanical already has 4
wave theories implemented)
• Irregular waves
• Shell New Wave
• Constrained Wave
© 2010 ANSYS, Inc. All rights reserved. 53 ANSYS, Inc. Proprietary
ASAS to Mechanical
- Soil-Pile-Structure Interaction
• Soil/Pile Interaction Solver (SPLINTER) enhanced to
work with Mechanical (via command snippets &
Matrix27 elements)
– PILEGEN and PILECALC macros included with the
ASAS installation (capability only available via ASAS
Offshore license)
© 2010 ANSYS, Inc. All rights reserved. 54 ANSYS, Inc. Proprietary
Design Assessment
- New System in Workbench
• Design Assessment System
– Available with Professional NLS and above
– Post-analysis assessments of FEA results
– Load Case Combinations
• Static Structural
• Flexible Dynamics (at a specific time)
© 2010 ANSYS, Inc. All rights reserved. 55 ANSYS, Inc. Proprietary
Design Assessment
- Customization
• Design Assessment System
– Advanced post-processing of FEA results
• Targeted at user wanting to do design code
assessment based on FEA models and results
– Predefined scripts supplied for ANSYS
supplied code checking tools
– Enables the customer to define additional data
that is associated with their model and then
perform custom post processing
• Custom definition of input data
• Custom result definitions
• Custom Solve & Post scripts (Python based)
© 2010 ANSYS, Inc. All rights reserved. 56 ANSYS, Inc. Proprietary
Design Assessment
- Assessment Types
• ANSYS or User Defined
– ANSYS Supplied Tools
• FATJACK
– Beam joint fatigue of
framed structures
• BEAMCHECK
– Member checks on
frame structures
• Solution Combination only
– User Defined
• User can build/integrate own
load case combination and
code checking tool
© 2010 ANSYS, Inc. All rights reserved. 57 ANSYS, Inc. Proprietary
Design Assessment
- Additional Code Checking Products
• ANSYS FATJACK
– Beam joint fatigue assessment
– New separate product
(also remains part of ASAS
Offshore)
– Python scripts provided
• ANSYS BEAMCHECK
– Was available initially at 12.0
– Python scripts provided
Joint Unitary
Check for
BEAMCHECK
FATJACK
Fatigue Result
© 2010 ANSYS, Inc. All rights reserved. 58 ANSYS, Inc. Proprietary
Mechanical
- Example Jacket Structural Analysis
Project Page showing various
“Mechanical” Systems
Detailed jacket model in
DesignModeler
Jacket model in Mechanical
Bending moment plot
SF/BM plots
along member
© 2010 ANSYS, Inc. All rights reserved. 59 ANSYS, Inc. Proprietary
Mechanical
- Example with Design Assessment (1)
Project Page showing various
“Mechanical” Systems
Simple riser in DesignModeler – each of 5
members with different diameter/thickness
Mechanical model – APDL macros for
wave loading and pile-substructure
Stress plot result using
Beam Tool
© 2010 ANSYS, Inc. All rights reserved. 60 ANSYS, Inc. Proprietary
Mechanical
- Example with Design Assessment (2)
Simple load combination (load factor) with first
Design Assessment system
Factored deformation
Second Design Assessment system
applies API code check
Code check parameters
entered in details panes
Unity check result
showing Yield
utilization
© 2010 ANSYS, Inc. All rights reserved. 61 ANSYS, Inc. Proprietary
Summary
• ANSYS continues to offer and invest in significant
capabilities for offshore applications
– Significant progress in implementing key features of
ASAS in ANSYS Structural Mechanics products
– New Design Assessment tool enabling advanced
customized post-processing, including application of
ANSYS developed code checking tools and user
custom capabilities (not limited to Offshore)
– Separate code checking products