@inproceedings{oai:jaxa.repo.nii.ac.jp:00003472, author = {張, 士寧 and 石原, 孟 and Zhang, Shining and Ishihara, Takeshi}, book = {宇宙航空研究開発機構特別資料, JAXA Special Publication: Proceedings of the First International Symposium on Flutter and its Application}, month = {Mar}, note = {First International Symposium on Flutter and its Application (May 15-17, 2016. Mielparque-tokyo), Minato-ku, Tokyo, Japan, One reliable simulation tool was developed to be able to predict dynamic response of Floating Offshore Wind Turbines (FOWTs) to various sea states. To represent real environmental condition in field site, multidirectional wave simulation was carried out in this research to investigate effect of wave spreading on dynamic response of FOWT. On the other hand, effect of tower frequency change due to flexible foundation on fatigue load was studied. It was found that unidirectional assumption is conservative in terms of prediction of dynamic motion of platform and multidirectional sea state should be employed to reach cost-effect design. In addition, when wind turbine is supported by flexible foundation, the change of tower natural frequency will result in significant increase of fatigue load. Therefore, Effect of flexible foundation on tower frequency change needs to be taken into consideration in the design of platform and commercial wind turbine., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA1630046079, レポート番号: JAXA-SP-16-008E}, pages = {729--738}, publisher = {宇宙航空研究開発機構(JAXA), Japan Aerospace Exploration Agency (JAXA)}, title = {Effects of multidirectional sea states and flexible foundation on dynamic response of floating offshore wind turbine system}, volume = {JAXA-SP-16-008E}, year = {2017} }