eprintid: 1517347 rev_number: 20 eprint_status: archive userid: 608 dir: disk0/01/51/73/47 datestamp: 2016-09-25 22:26:03 lastmod: 2020-02-12 16:29:16 status_changed: 2016-09-25 22:26:03 type: proceedings_section metadata_visibility: show creators_name: Al-Hammadi, M creators_name: Simons, RR title: Effect of vibration on the scour process around cylindrical structures under unidirectional flow in a sandy bed ispublished: pub divisions: UCL divisions: A01 divisions: B04 divisions: C05 divisions: F44 abstract: The structures that support wind turbines in offshore wind farms are dynamically sensitive and can vibrate as a consequence of their slenderness and their location in severe environments subject to strong wind and wave load. The granular soils in which such structures are often located are highly responsive to vibrations; depending on their initial state, these soils might experience processes such as compaction, dilation, and liquefaction. Their behaviour in response to structural movement and the effect on the rate of scour is the subject of the present work. Laboratory experiments have been conducted to investigate the effects of vibration on the scour process in granular soil. A series of storms were simulated by a continuous sequence of periods with and without vibration applied to a model pile. The results show that although scour depths are initially reduced by vibration (backfilling), the lateral extent of the scour hole grows and the final scour depth and extent can be significantly greater than for an equivalent test without vibration. date: 2016-08-29 date_type: published oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 1158999 isbn_13: 9781138029798 lyricists_name: Al-Hammadi, Mohammed lyricists_name: Simons, Richard lyricists_id: MRALH27 lyricists_id: RRSIM33 full_text_status: public series: International Conference on Scour and Erosion publication: Scour and Erosion: Proceedings of the 8th International Conference on Scour and Erosion event_title: 8th International Conference on Scour and Erosion event_location: Oxford, UK event_dates: 12 September 2016 - 15 September 2016 institution: 8th International Conference on Scour and Erosion citation: Al-Hammadi, M; Simons, RR; (2016) Effect of vibration on the scour process around cylindrical structures under unidirectional flow in a sandy bed. In: (Proceedings) 8th International Conference on Scour and Erosion. Green open access document_url: https://discovery-pp.ucl.ac.uk/id/eprint/1517347/1/AlHammadiSimons2016.pdf