PHATAS Release "NOV-2003" and "APR-2005" USER’S MANUAL

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PHATAS Release "NOV-2003" and "APR-2005" USER’S MANUAL
Program for Horizontal Axis wind Turbine Analysis and Simulation
C. Lindenburg
Preface
This manual is related to the use of PHATAS release "APR-2005" and "NOV-2003".
Release "APR-2005" and the former release "NOV-2003" were developed as result of activities
making the code suitable for load-set calculations (following G.L., IEC, or NVN) wind turbine
and rotor blade manufacturers, ECN project no. 7.9421. This included among others some
modifications of the input structure, using a global coordinate system (to describe e.g. the wind
loading) that corresponds with the G.L. ’Vorschriften und Richtlinien’, and improvements of
the control algorithm.
In performing these modifications it was kept in mind that this PHATAS version should be
running under the rotor blade design tool FOCUS, ECN project no. 7.9413.
In addition to the User’s manual (the underlying report) release "APR-2005" is documented in
a validation report (as non-formal ECN note) that focuses on the structural dynamic modelling
of the tower and the turbine-tower interactions.
The most significant improvements issued for release "APR-2005" compared to "NOV-2003"
are an extension to the variables in the binary datafile with the forces in the blade root, adding
some inertia properties of the nacelle, and allowing analysis of towers with a tripod base. Small
improvements on release "APR-2005" may be issued as release "APR-2005b", "APR-2005c",
etcetera. For those releases the input dataset and the format of the binary datafile will remain
the same, which implies that this manual will still be applicable.

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