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Titel:
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Recommended Practices for Measuring in Situ the "Loads" on Drive Train, Pitch System and Yaw System
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Auteur(s):
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Gepubliceerd door:
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Publicatie datum:
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ECN
Windenergie
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13-9-2010
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ECN publicatienummer:
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Publicatie type:
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ECN-E--10-083
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ECN rapport
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Aantal pagina's:
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Volledige tekst:
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81
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Download PDF
(1893kB)
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Samenvatting:
The current standards and guidelines concerning prototype measurement campaigns are discussed.
The experience in and requirements of load measurements is given concerning the three mechanical
components: drive train, pitch system and yaw system. Based on this, a new method is proposed for
setting up a prototype measurement campaign with the aim to validate and/or improve the models of
the mechanical components that have been used during the design.
The method is flexible and consists of six steps that have to be taken. The flexibility is necessary as
there are many different versions of each of these mechanical components and the models that are
used also show large differences. Therefore the measurement campaign has to be specific, depending
on the version of the component itself as well as the type of model used for the calculations. For
example if high frequencies are not present in the model, it has no use to measure them, keeping in
mind that the goal of the proposed measurement campaign set up is to validate the model. The six
steps approach is illustrated by application of the method to these three components; drive train,
pitch system and yaw system. The drive train has been modelled using the standard modelling in
most aeroelastic tools as well as a more detailed multi body model. For the pitch system the friction
is analysed as well as the ovalisation. As the analysis for the yaw system is very much similar to the
pitch system, only the last steps (Step 4 to 6) are dealt with, concentrating on measurement
aspects regarding the yaw system.
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