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GH_Bladed-4.8-Theory Manual

Bladed

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GH-Bladed 4.8 Theory Manual,软件的理论手册，风电行业

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Bladed Theory Manual

Version 4.8

DISCLAIMER

Acceptance of this document by the client is on the basis that Garrad Hassan

& Partners Ltd is not in any way to be held responsible for the application or

use made of the findings of the results from the analysis and that such

responsibility remains with the client.

unless agreed in writing by Garrad Hassan & Partners Ltd.

DNV GL

One Linear Park, Avon Street, Temple Quay, Bristol, BS2 0PS, UK

www.dnvgl.com/software

1. INTRODUCTION

1.1 Purpose

Bladed is an integrated software package for wind turbine performance and loading

calculations. It is intended for the following applications:

 Preliminary wind turbine design

 Detailed design and component specification

 Certification of wind turbines

With its sophisticated graphical user interface, it allows the user to carry out the following

tasks in a straightforward way:

 Specification of all wind turbine parameters:

 Aerodynamic and structural properties

 Power train and electrical systems

 Sensors and actuators

 Control and safety systems

 Specification of environmental inputs and load cases:

 Wind field

 Waves and currents

 Earthquakes

 Turbine faults

 Electrical network disturbances

 Rapid calculation of steady-state performance characteristics, including:

 Aerodynamic information

 Performance coefficients

 Power curves

 Steady operating loads

 Steady parked loads

 Dynamic simulations covering all turbine states:

 Normal running

 Start-up

 Normal and emergency shut-downs

 Idling

 Parked

 Post-processing of results to obtain:

 Basic statistics

 Periodic component analysis

 Probability density, revs at level, peak value and level crossing analysis

 Spectral analysis

 Cross-spectrum, coherence and transfer function analysis

 Rainflow cycle counting and fatigue analysis

 Combinations of variables

 Dynamic power curve and annual energy yield

 Ultimate loads (identification of worst cases)

 Statistical extrapolation of extreme loads

 Flicker severity

 Presentation: results may be presented graphically and can be combined into a word

processor compatible report.

1.2 Theoretical background

The Garrad Hassan approach to the calculation of wind turbine performance and loading has

been developed over many years. The main aim of this development has been to produce

reliable tools for use in the design and certification of wind turbines.

Many of the models and theoretical methods incorporated in Bladed have been extensively

validated for wind turbines against monitored data from a wide range of turbines of many

different sizes and configurations, including:

 WEG MS-1, UK, 1991

 Howden HWP300 and HWP330, USA, 1993

 ECN 25m HAT, Netherlands, 1993

 Newinco 500kW, Netherlands, 1993

 Nordex 26m, Denmark, 1993

 Nibe A, Denmark, 1993

 Holec WPS30, Netherlands, 1993

 Riva Calzoni M30, Italy, 1993

 Nordtank 300kW, Denmark, 1994

 WindMaster 750kW, Netherlands, 1994

 Tjaereborg 2MW, Denmark, 1994

 Zond Z-40, USA, 1994

 Nordtank 500kW, UK, 1995

 Vestas V27, Greece, 1995

 Danwin 200kW, Sweden, 1995

 Carter 300kW, UK, 1995

 NedWind 50, 1MW, Netherlands, 1996

 DESA, 300kW, Spain 1997

 NTK 600, UK, 1998

 West Medit, Italy, 1998

 Nordex 1.3 MW, Germany, 1999

 The Wind Turbine Company 350 kW, USA, 2000

 Windtec 1.3 MW, Austria, 2000

 WEG MS-4, 400 kW, UK, 2000

 EHN 1.3 MW, Spain, 2001

 Vestas 2MW, UK, 2001

 Lagerwey 750 Netherlands, 2001

 Vergnet 200, France 2001

 Areva M5000, 2013

 Gamesa G97, 2015

 GE Haliade 6MW, 2016

This document describes the theoretical background to the various models and numerical

methods incorporated in Bladed.

1.3 Support

Bladed is supplied with a one-year maintenance and support agreement, which can be

renewed for further periods. This support includes a ‘hot-line’ help service by telephone, fax

or e-mail:

Telephone: +44 (0)117 972 9900

User portal: https://renewableenergysoftwareportal.dnvgl.com/

E-mail bladed@dnvgl.com

1.4 Documentation

In addition to this Theory Manual, there is also a Bladed User Manual which explains how the

code can be used.

1.5 Acknowledgements

Bladed was developed with assistance from the Commission of the European Communities

under the JOULE II programme, project no. JOU2-CT92-0198. .

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