FOCUS6 is the integrated modular tool to design wind turbines and wind turbine components like rotor blades. For nearly two decades FOCUS6 is being used by wind turbine OEMs, engineering companies for blade design, certification bodies, research institutes and universities. FOCUS6 integrates on- and offshore wind turbine design with blade and support structure design.

FOCUS CoreThe FOCUS Core system is a modular integrated software design suite. The Core system comprises the graphical user interface (GUI), the ex-tended database structure, control and integration of the various modules and post-processing tools.The Core system allows parametrization of models and has optimization features. Using the Python interface, tasks can be automated.

Rotor Pre-Design, Aero-elasticity IFor the aero-elastic pre-design of rotor blades a dedicated module is available. With this module the aero-elastic performance of rotor blades can be determined and stability analyses can be performed without the need for a full turbine model or a detailed blade design. This makes it easy to scale up / down an existing blade design and modify it to become the basis for a new blade design.

The Aero-elasticity I module can use either BEM or Vortex Wake model theory as the basis for calculations. The models include torsional defor-mation and transverse shear flexibility and many aerodynamic and struc-tural dynamic coupling terms for bending and torsion dynamics.

Turbine Design, Aero-elasticity IIWith the Aero-elasticity II module the simulation of combined aerodynam-ic and structural dynamic behaviour of a wind turbine in the time domain is available.

The rotor aerodynamics are solved using of the engineering BEM theory of which the sub-models for tip-loss, tangential induction, blade-tower in-teraction, oblique inflow effects and rotational effects are combined on a physical basis. The tower model gives a detailed and well-validated dy-namic response of the tower including all mutual interactions with the tur-bine model ncluding the aerodynamics of the rotor.

A built-in PD controller is provided that includes rotor speed filtering and peakshaving strategy. In addition, dedicated controllers using the Bladed interface or the ECN Control Design Tool interface can be used (DLL).

Soil behaviour can be modeled by foundation springs and P-y curves.Load cases for IEC or GL load set calculations can be generated auto-matically. For this purpose models are available to simulate fault condi-tions and emergency situations. The results are accepted for certification.

FOCUS6 - The integrated wind turbine design suite

WMCKnowledgeCentre

www.wmc.eu | YouTube: youtube.com/wmceu

Noise EmissionThe noise emission module (requires Aero-elasticity I module) calculates the sound power level of the wind turbine blades and sums it to the overall wind turbine sound power level.

Structural Blade DesignFOCUS6 includes the unique 3D Structural Blade Modeler, that allows users to interactively model rotor blades in detail. While defining the blade step-by-step, the interactive 3D visualization gives direct feedback of the design changes.

A blade definition is created by putting profiles in 3D space, defining lines and materials and finally specifying between which lines and profiles the section of material needs to be placed. Material properties include ply thicknesses and SN-line formulation, with material-specific constants like UTS, UCS and extended material proper-ties e.g. for Puck analysis. This makes it possible to model and use actual material properties in your calculations.

Common structural analyses (strain, stress, strength, fatigue, buckling, modal, tip deflection etc.) using an advanced beam model approach can be performed. These analyses are based on load time series, generated by the Aero-elasticity II Turbine Design module, or imported from external software like Bladed and Flex.

Cross section properties can be exported to be used by BEM based tur-bine simulation applications such as the Aero-elasticity II module of FO-CUS6 or external simulation programmes like DNV GL Bladed.

FEM for Blade DesignThe FOCUS FEM provides a composite thick shell finite element that supports tapered layers. The FOCUS FEM module provides features like static structural analyses, Puck failure criterion, composite thick shell ele-ments, Full layup (individual plies) and RBE3 elements for load introduc-tion.

FEM Mesh Export for Blade DesignWith the FEM Mesh Export module, the blade model created in the Struc-tural Blade Design module can be converted automatically into a finite el-ement mesh. The finite element mesh can be exported to general purpose FEM software like Abaqus, MSC.MARC, MSC.NASTRAN and ANSYS. The finite element mesh is thick shell element based and contains the full layup information. Both linear and parabolic elements are supported.

Bladed 4 InterfaceBlade data from the Structural Blade Design module can be exported to Bladed 4.x (DNV GL) for calculating the load case time series by Bladed as an alternative for the calculation by FOCUS6. For the structural analy-sis of the blade, Bladed load sets can be imported automatically.

OffshoreThe Offshore module provides an interactive 3D modeler to design sup-port structures. The modeler supports monopiles, jacket and lattice tower-like structures. The members of the support structure can be filled with water. Marine growth and grouted members are supported. For post-pro-cessing, an interactive 3D visualization tool is available to analyse the system dynamics, displacements and stresses.

www.wmc.eu | YouTube: youtube.com/wmceu

In addition, the offshore load case preprocessor automatically generates combined wave and wind load sets, compliant with current standards such as IEC 61400-3.

The main features are:● Interactive graphical modeler● Load set generator according to IEC 61400-3● Stochastic and deterministic wave generator● Visualization of results and animation of simulations● Calculation of displacements and member forces● Calculation of nominal stresses in members● The offshore module is used in combination with the Aero-elasticity II

module.

Extreme ExtrapolationThe Extreme Extrapolation module performs the 50-year load extrapola-tion as required by IEC 61400-1 Ed. 3 and IEC 61400-3 Ed. 1. The module supports Peak-over-Threshold (POT) and the Block method to determine the extremes. Different fitting methods for distribution functions such as Generalized Pareto and Generalized Extreme Value are available.

Blade TestingKnowledge Centre WMC has extensive experience with structural testing of rotor blades. Recently, this knowledge has been used to extend our FOCUS6 Wind Turbine Design package with a dedicated module for mod-elling and simulation of blade tests. Besides the design and preparation of tests, test results can be imported into FOCUS6 and compared with simulation results.

Small Wind TurbinesFOCUS6 for Small Wind Turbine Design aims for wind turbine design ac-cording to the IEC 61400-2. This design code is for wind turbines up to 200 m2 rotor area which is about equivalent for a rotor diameter up to 16 meter and a rated power up to approximately 40 kW. The FOCUS6 SWT module has similar capabilities as FOCUS6 Aero-elasticity II, but is limited to a maximum rotor diameter of 18 meter. An upgrade path to FOCUS6 Aero-elasticity II is available. With the SWT Wind Turbine Design module the calculation of combined aerodynamic and structural dynamic behav-iour of a wind turbine in the time domain is available.

TidalFOCUS6 Tidal is a special version of the Aerolelasticity II module with special additions for tidal stream turbines. This module can be combined with other FOCUS6 modules such as the Structural Blade Design module.The tidal turbine can be mounted in an upside-down position.

Main features of FOCUS6 Tidal:● Tidal stream turbine simulator● Combined wave, current and turbulence generator● Current, powerlaw, wind induced current, user defined current distri-

bution● Waves, Jonswap, Pierson-Moskowitz

Queue ManagerThe Queue Manager can be used to run jobs on one or more separate calculation servers to reduce the turnaround time of calculations. Jobs are scheduled from workstations. This is in particular useful for load set calculations, parameter studies and optimization.

10-9

10-8

10-7

10-6

10-5

10-4

10-3

10-2

10-1

100

9000 9500 10000 11000 12000 13000 14000

Prob

ablilt

y of e

xcee

danc

e [-]

Blade root flap moment [kNm]

FITL-Moment

1 YEAR

50 YEAR

www.wmc.eu | YouTube: youtube.com/wmceu

LicensingIn the table below, the prices are provided for perpetual single-user li-censes. The license fee includes a training session at WMC or via internet and maintenance and support for the first year.

Price list 2018 Price requiresmodule

1 FOCUS Core € 7,4502 Rotor Pre Design, A I € 8,100 13 Turbine Design, A II € 13,650 14 Structural Blade Design € 17,450 15 Bladed 4 Interface € 1,700 1,46 FEM for Blade Design € 6,200 1,47 Offshore € 7,450 1,38 FEM Mesh Export for Blade Design € 1,700 1,49 Noise Emission € 8,600 1,2

10 Extreme Extrapolation € 1,700 1,311 Queue Manager € 3,100 112 Blade Testing € 6,200 1,4,613 Small Wind turbines € 8,100 114 Tidal € 13,650 1

Multi-user licenses via local network dongles (floating license) are avail-able. For each additional user the price amounts to 7.5% of the list price.Licenses for a shorter period, trial licenses and educational licenses are available on request.For additional dongles (node locked license) please request for a quote.

TrainingAlthough the software is very user friendly, the possibilities the software offers to the users are very extensive. Therefore the core system and all the modules include a training session at WMC or via internet. Based on the modules purchased a dedicated basic training session to learn how to use the software will be organized. This can vary from half a day to about a week, depending on the amount of modules. This basic training is for one licensee at the time and will be planned in mutual agreement. The training includes a certificate for successful students. The extensive train-ing material is included with the software and can be used as self-study material as well.

ECNThe FOCUS6 modules marked with the ECN logo are developed with contributions of Energy research Centre of the Netherlands (ECN), see: www.ecn.nl.

More informationFor more information, quotes and demonstration of the software, please use the contact information below.

Contact information:

Knowledge Centre WMC P.O. Box 43 1770 AA Wieringerwerf The Netherlands

+31-(0)227-50 49 49www.wmc.euinfo@wmc.euyoutube.com/wmceu

Phone: Internet: E-mail:YouTube: