{"created":"2023-06-20T14:37:03.020860+00:00","id":3419,"links":{},"metadata":{"_buckets":{"deposit":"fc87c849-2273-40f6-9324-ec3d61fd958b"},"_deposit":{"created_by":1,"id":"3419","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"3419"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00003419","sets":["1887:1891","9:789:817:824"]},"author_link":["13511","13512","13513","13510"],"item_5_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2017-03-15","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"266","bibliographicPageStart":"257","bibliographicVolumeNumber":"JAXA-SP-16-008E","bibliographic_titles":[{"bibliographic_title":"宇宙航空研究開発機構特別資料"},{"bibliographic_title":"JAXA Special Publication: Proceedings of the First International Symposium on Flutter and its Application","bibliographic_titleLang":"en"}]}]},"item_5_description_15":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）（英）","attribute_value_mlt":[{"subitem_description":"First International Symposium on Flutter and its Application (May 15-17, 2016. Mielparque-tokyo), Minato-ku, Tokyo, Japan","subitem_description_type":"Other"}]},"item_5_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"The suppression or delay of flutter in long-span suspension bridges is investigated experimentally. Since the torsional stiffness of a bridge deck decreases with increasing length, an active flap flutter suppression system could potentially enable the construction of longer spans without costly increases in deck width and depth. An active flap flutter suppression system could be deployed as a temporary measure during construction when the deck, not yet tied down at one or both ends, is particularly vulnerable to flutter instability. In the current experiment, a rigid sectional model of a long-span suspension bridge is mounted on a suspension system in a wind tunnel. Moving flaps attached to the bridge section's leading and trailing edges are controlled in real-time in response to the bridge section's heave and pitch motions. Other modes of bridge section motion, such as sway, were suppressed through the use of drag wires. Experimental assessment of the deck's aerodynamic derivatives and their similarity to those of a flat plate justified the aerodynamic force modeling using a theoretical model based on Theodorsen's theory; the flap control system is designed through an H∞ optimisation. The control system design was constrained to low-order passive controllers that could be effectively replaced by reliable, passive (no external energy input) mechanical networks that drive the flaps through the bridge deck motion. The flutter-suppression effectiveness of various controllers with one or both actuated flaps, and different feedback quantities including one, or a combination of the bridge section's pitch angle and heave positions or velocities, was tested. Flutter velocity increases in excess of 20% were attained with very good robustness margins.","subitem_description_type":"Other"}]},"item_5_description_18":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"形態: カラー図版あり","subitem_description_type":"Other"}]},"item_5_description_19":{"attribute_name":"内容記述（英）","attribute_value_mlt":[{"subitem_description":"Physical characteristics: Original contains color illustrations","subitem_description_type":"Other"}]},"item_5_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA1630046026","subitem_description_type":"Other"}]},"item_5_description_33":{"attribute_name":"レポート番号","attribute_value_mlt":[{"subitem_description":"レポート番号: JAXA-SP-16-008E","subitem_description_type":"Other"}]},"item_5_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"宇宙航空研究開発機構(JAXA)"}]},"item_5_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"Japan Aerospace Exploration Agency (JAXA)"}]},"item_5_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1349-113X","subitem_source_identifier_type":"ISSN"}]},"item_5_source_id_24":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA11984031","subitem_source_identifier_type":"NCID"}]},"item_5_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Imperial College"},{"subitem_text_language":"en","subitem_text_value":"University of Warwick"},{"subitem_text_language":"en","subitem_text_value":"University of Oxford"},{"subitem_text_language":"en","subitem_text_value":"Imperial College"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Gouder, Kevin","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Zhao, Xiaowei","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Limebeer, David","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Graham, J. Michael R.","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-01-15"}],"displaytype":"detail","filename":"AA1630046026.pdf","filesize":[{"value":"2.1 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"AA1630046026.pdf","url":"https://jaxa.repo.nii.ac.jp/record/3419/files/AA1630046026.pdf"},"version_id":"6b1b1145-9f3c-48fe-95f8-0b0308a2303f"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"flutter","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"wind-tunnel","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"long-span suspension bridge","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"robust control","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"flaps","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"conference paper","resourceuri":"http://purl.org/coar/resource_type/c_5794"}]},"item_title":"Experimental flutter suppression of a long-span suspension bridge section","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Experimental flutter suppression of a long-span suspension bridge section","subitem_title_language":"en"}]},"item_type_id":"5","owner":"1","path":["824","1891"],"pubdate":{"attribute_name":"公開日","attribute_value":"2017-04-27"},"publish_date":"2017-04-27","publish_status":"0","recid":"3419","relation_version_is_last":true,"title":["Experimental flutter suppression of a long-span suspension bridge section"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-21T09:02:57.019033+00:00"}