OpenWindPower

Fixed Foundation Capabilities

Ultimate Static Offshore Package

• Capabilities for offshore jackets, wharfs, and dolphin structures
• Interactive graphics modeled with advanced 3D capabilities and interactive graphics post processor, seastate, joint can, pile, combine, gap, tow, and LDF large deflection
• Automatic model generation, beam and finite element capability, steel code check and redesign, environmental load generation, tubular connection check, single pile/soil interaction, inertia and moving load generation, tension/compression nonlinear elements with initial gap, load case combination, linear large deflection analysis, and full output report and plotting capabilities

Plastic Nonlinear Collapse Advanced

• Nonlinear foundation, and nonlinear and plastic analysis capabilities
• Plastic analysis includes pushover, ship impact, and blast nonlinear analysis
• Collapse results viewer with graphical step navigation along the loading-time chart

Pile-soil Interaction

PSI nonlinear soil/pile/structure interaction program module. Includes interface to PLAXIS Monopile Designer for large diameter monopile analysis in accordance with the PISA2 approach

Advanced Dynamic Fatigue Package

Contains the modules required to perform any dynamic deterministic, time history, or spectral fatigue analysis

Fatigue Life Evaluation and Redesign

• Spectral, time history, and deterministic fatigue analysis
• Cyclic stress range calculation procedures include wave search, curve fit, and interpolation
• SCF calculations recommended by API (including 21st ed. supplements), HSE, DNV, DS449, and Norsok Codes
• Automatic redesign
• API (including 21st ed. supplements), AWS, HSE, and Norsok thickness dependent recommended S-N curves
• Multiple run damage accumulation
• Pierson-Moskowitz, JONSWAP, Ochi-Hubble double peak, simplified double peek, and user-defined spectra
• Automated or user-specified connection details
• Pile fatigue analysis
• Wave spectra creation from scatter diagram
• Paris equation used to predict crack growth rate due to cyclic stresses
• Load path dependent joint classifications
• Includes wave spreading effects
• Reservoir (rain flow) cycle counting method
• ISO 19902

Turbine Manufacturer Interfaces

Siemens, MHI Vestas via Craig Bampton dynamic superelement

Floating Platform Capabilities

MOSES Modeler

• Fast, effective and intuitive modeling of floating wind turbine hydrodynamic and structural geometry
• Trimesh modeling for creating simple box, column and cylinder shapes
• Advanced 3D NURB surfaces for modeling more complex geometries
• Import of existing geometry from file in *.ply, *.gdf, *.3dm, IGES, and DXF formats
• Parametric modeling through Microsoft Excel macros
• Assign MOSES structural classes and elements, pieces, parts, and bodies

MOSES Executive

• Keep track of all analysis and wind turbine model files with MOSES projects
• Simple editing of analysis files with context sensitive help, and command and option highlighting
• Interactive reporting, graphing, and 3D-model visualization

MOSES Language

• Powerful and flexible language for specifying system behavior and performing complex analyses
• Macros, loops, and conditional execution

Hydrodynamics

• 3D Diffraction and Morrison’s Equation
• Automatic adaptive meshing trims and refines the hydrodynamic mesh at the waterline
• Nonlinear, slowly varying, wave drift forces
• RAOs (response amplitude operators) at center of gravity or remote location
• Frequency domain pressure visualization as per DNV-OS-J103
• Hydrostatic and hydrodynamic data exported in WAMIT file format for aeroelastic wind turbine solver simulations

Connectors

• Catenary mooring lines with buoys or clump weights
• Rod elements for accurate mooring line and power cable dynamics with large deflection beam capabilities
• Lift, lower, or upend with multiple slings and hooks
• Activate or deactivate to simulate breaking or re-rigging
• Nonlinear springs with tension or compression only

Time Domain Analysis

• Fast computation of the full system response
• Automatic import of aeroelastic solver time series loads from DNV’s Bladed
• Single or multi-body simulations
• Current, irregular waves, and/or wind
• Multiple body motions can be analyzed
• Dynamic tank flooding and emptying

Structural Code Checking

• Beam and plate element analysis
• Linear, nonlinear, and frequency domain analysis
• Modal analysis using subspace iteration
• Code checking to API, AISC, NORSOK, and ISO codes
• Plate panel checks as per DNV-RP-C201 and DNV-RP-C202
• Interactive results visualization with Postvue

Fatigue Life Evaluation and Redesign

• Spectral, time history, and deterministic fatigue analysis
• SCF calculations recommended by API (including 21st Ed. supplements), HSE, DNV, DS449, and NORSOK codes
• API (including 21st Ed. supplements), AWS, HSE, and NORSOK thickness dependent recommended S-N curves
• Reservoir (rain flow) cycle counting method
• ISO 19902

OpenWindPower Fixed Foundation

OpenWindPower Fixed Foundation software provides a comprehensive set of capabilities for the design and analysis of offshore wind turbine foundation structures subject to wave, wind, and turbine mechanical loading. The analysis approach is capable of predicting
both fatigue and extreme loads for the substructure and nonlinear soil foundation.

Analyze wave and wind loading

Wave and wind loading can be represented by either a time history or in spectral form. Commonly used wave and wind loading spectra are available.

Perform coupled or uncoupled analysis

The software features an interface to the GH Bladed and FAST* software, accounting for the full coupling between wave, wind, and the wind-induced mechanical loading for a multimodal response analysis. The GH Bladed multicore interface is fully automated, allowing the user to handle hundreds of time history simulations required for a typical fatigue analysis. The optional multicore capabilities allow for a dramatic reduction in runtime.

Joint Mesher

The Joint Mesher program allows for the seamless creation of 3D meshes for complex stiffened and unstiffened joints in minutes, saving many hours of detailed mesh generation. Joint Mesher also automates the creation of extraction nodes for hot spot SCF calculation in accordance to DNVGL RP-C203 or a user-defined setting. The program then creates the mesh and the corresponding predefined loading conditions (axial and in- and out-of-plane bending) for the static analysis and post processing for automatic SCF extraction.

OpenWindPower Job Creator

The analysis and design of an offshore wind turbine substructure and foundation involves the analysis of tens of thousands of time history simulations with different wind, wave, and turbine loadings. The Job Creator allows the user to use an Excel spreadsheet to automatically set up the file/directory structure for all the time history simulations in minutes, saving weeks of manual, error-prone job creation.

Large Diameter Monopiles

The API approach severely underestimates the load carrying capacity of large diameter monopiles. The OpenWindPower – PLAXIS Monopile Designer interface to the finite element based SACS Pile3D module allows the user to determine the load carrying capacity of large diameter monopiles in accordance with the PISA2 method resulting in a cost savings up to 30%.

Suction Bucket Foundation Design

The OpenWindPower – PLAXIS interface allows the user to design single or multiple suction buckets seamlessly with the accurate soil structure interaction and capacity checks in PLAXIS 3D to the full bucket structural analysis and code design in SACS. The approach accounts for the full nonlinear interaction between multiple suction bucket foundations on a substructure.

OpenWindPower-Siemens Femap Interface

The Femap interface allows the user to model transition or component pieces and other complex geometries in Femap and import them into SACS for analysis and design.

Cloud or LAN Grid Computing

The Cloud or LAN Grid option allows the user to define multiple virtual or physical computer nodes over a cloud or company’s local area network to run multiple analysis in parallel, to achieve up to 100 times saving in analysis computing time.

OpenWindPower Floating Platform

OpenWindPower Floating Platform software provides a comprehensive set of capabilities for the design and analysis of floating offshore wind turbine structures in a single product. Hydrodynamic and structural models can be designed in 3D with advanced modeling capabilities. These models are subjected to wave, current, wind, and turbine mechanical loads to predict motions and compute fatigue on the floating platform.

Parametric Modeling

Complex 3D models of any wind turbine platform are created in minutes, using wizards and interactive sketch features in MOSES Modeler. Model geometry can be imported from a variety of file formats, or powerful mesh modeling and automated curve and surface fitting tools can be used to quickly generate hydrodynamic and structural meshes in a single model for the analysis of new or existing platforms. The application enables you to explore design alternatives with advanced parametric modeling through macros in Microsoft Excel.

Aeroelastic Solver Integration

MOSES computes the hydrodynamic and hydrostatic loads on any floating wind turbine platform and exports this data in the widely accepted WAMIT file format. Aeroelastic wind turbine solvers, for example DNV’s Bladed, can apply this data to a turbine simulation, saving the resultant time series load information for later use. Advanced built-in MOSES macros read and apply these loads to the MOSES model during a time domain simulation, which computes sea pressures and inertial loads for detailed structural analysis.

OpenWindPower Job Creator

The design and analysis of a floating offshore wind turbine platform requires the calculation of tens of thousands of simulations with varying wind, wave, and turbine loads. An inbuilt MOSES automation tool allows for the import of multiple load time series produced by the aeroelastic solver in minutes, saving weeks of manual error-prone job creation. The MOSES Executive interface streamlines the management of all the input and result data files.

OpenWindPower-Siemens Femap Interface

The Femap interface allows you to model transition or component pieces and other complex geometries in Femap and import them into
SACS and MOSES.

LAN Grid Computing

Bentley’s grid analysis service allows for the definition of a distributed network of virtual or physical computer nodes over a company’s local area network. Multiple MOSES floating wind turbine load simulations can be processed in parallel over the grid, saving months of computation time.

Structural Post Processing API

Industry standard structural code checking and fatigue with built-in SACS components to post process all beam and plate stresses from a common solution file SQLite database (CSFDb). A comprehensive SDK /API is available to automatically extract and post process the structural results for fast solution optimization. Full interactive visualization of the structural results is available to quickly identify high-stressed areas.

Native SQLite Results Database

Exported MOSES results, at all stages of the workflow, are stored in an SQLite Database for fast, efficient data visualization. The MOSES Executive includes advanced tools for querying, filtering, and plotting results for visualization and animation of the floating wind turbine model.