Couldrey, A. and Whitehouse, R.J.S. and Harris, J. and Marten, K. (2023) Nacelle natural frequency data to assess the effectiveness of pre- and post-installation scour protection. In: ICSE 2023 (11th International Conference on Scour and Erosion), 17-21 September 2023, Copenhagen, Denmark.
Full text not available from this repository.Abstract
At the case study offshore wind farm 140 wind turbine generators were installed atop monopile foundations. At four monopiles a filter rock layer was installed before the piling operations took place, with an armor layer installed atop this layer after piling (pre-installation) and at six monopiles rock protection was installed after some scour had developed (post-installation). Accelerometers were installed in the nacelle of each wind turbine generator. Natural frequency data have been recorded for 10 years since the installation of the scour protection. The initial natural frequency for the pre-installation foundations was significantly higher (i.e. the pre-installation foundations were stiffer). The natural frequency was observed to increase with time at all locations where scour protection had been installed. It is thought that this was due to the densification of the sand within the rock matrix. These findings have implications for the pile fatigue and the management of the site.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Subjects: | Maritime > General |
| Divisions: | Maritime |
| Depositing User: | Helen Stevenson |
| Date Deposited: | 12 Jul 2023 13:41 |
| Last Modified: | 26 Sep 2023 11:00 |
| URI: | http://eprints.hrwallingford.com/id/eprint/1545 |
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