The present dataset contains the OpenFAST input files for the TripleSpar floating wind turbine platform that was developed in the European projects INNWIND.EU and LIFES50+. In Task 4.3 of the European FP7-project INNWIND.EU, innovative design solutions for large offshore wind turbine foundations were developed in 2014. The design of the concrete TripleSpar foundation resulted from the design competition reported in INNWIND.EU deliverable [3] D4.33 and was further developed within INNWIND.EU in [4] D4.37. It was further detailed with the mooring line layout in task 4.1 of the European Horizon2020-project [7] LIFES50+. The concept is designed to hold the DTU10MW reference wind turbine, of which all necessary input files are included in the present repository, taken from [2] DTU 10MW Reference Wind Turbine git repository. The OpenFAST input files of the turbine from the latter repository are included in the present dataset. Only the floating platform, the tower, and mooring line models are added/modified in the present dataset. The mooring system of the TripleSpar was updated in the course of LIFES50+. A description is available in [7] LIFES50+ D4.1. The same mooring system was tested in a scaled experiment in 2016. The TripleSpar concept is intended to be used openly by the research community. The parameters of the present dataset are not changed from former version 1.0 (published formerly on https://www.ifb.uni-stuttgart.de/en/research/windenergy/). Minor updates resulting from detailed structural design can be found in [4] INNWIND.EU D4.37 Design Solutions for 10MW Floating Offshore Wind Turbines. These changes do not refer to the hull shape, only the interior mass distribution. The Morison drag coefficients in the HydroDyn files are calculated for each stochastic load condition using a KC-dependent drag parameterization as described in Lemmer (2018) and Lemmer, Yu & Cheng (2018).

To run, please take the following steps:

Download openFAST from the above URL, if problems occur get v1.0.0 Download the files of this dataset to the same directory. Make sure the .fst files are in the same directory as the OpenFAST.exe file. I will call this the "working directory" Open a command line and type the drive letter followed by a colon of the working directory (i.e. D:) and press enter Use cd to move to the working directory, i.e. cd documents/TripleSpar/ Run FAST simulation by typing: OpenFAST.exe v0_12d00.fst

The OpenFAST input files of this dataset are written with initial conditions equal to the equilibrium states of the system at different wind speeds, in order to reduce the transient time at the beginning of a time-domain simulation. The convention for the filenames is that the floating point mean wind speed at hub height v0 [m/s] is included with the decimal point being replaced by "d".