{"created":"2023-07-27T06:50:17.742712+00:00","id":43020,"links":{},"metadata":{"_buckets":{"deposit":"8069d6c3-3af5-4510-abf9-c16cc9b89966"},"_deposit":{"created_by":18,"id":"43020","owners":[18],"pid":{"revision_id":0,"type":"depid","value":"43020"},"status":"published"},"_oai":{"id":"oai:kanazawa-u.repo.nii.ac.jp:00043020","sets":["2812:2813:2845"]},"author_link":["69205","69212"],"item_9_biblio_info_8":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1989-03","bibliographicIssueDateType":"Issued"},"bibliographicPageStart":"7p.","bibliographicVolumeNumber":"1986-1988","bibliographic_titles":[{"bibliographic_title":"昭和63(1988)年度 科学研究費補助金 一般研究(C) 研究成果報告書"},{"bibliographic_title":"1988 Fiscal Year Final Research Report","bibliographic_titleLang":"en"}]}]},"item_9_creator_33":{"attribute_name":"著者別表示","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{}],"nameIdentifiers":[{}]}]},"item_9_description_21":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"強風時の超大橋の主塔背後の後流域を車両が通過する際、時間的・空間的に急激に変化する横風変動を受け、走行車両の安全性の面からも新たな関心を集めており、横風変動を受けるBluff bodiesに作用する流体力の研究が重要である。本研究は主塔後流域を通過する際の車両の走行性に関する基礎的研究として、横風変動を受けるBluff bodiesに作用する流体力を風洞模型実験により研究した。走行するBluff body模型は基本形状から次第に複雑な形状へ、例えば正方形断面および長方形断面の2次元模型そして3次元立方体や直方体模型の各種模型を造り、断面形状、主塔断面/走行物体断面の比の流体力におよぼす影響に注目した。まず、各種模型の後流域の走行レーンの各位置におけるそれぞれの静的流体特性を調べた。走行実験は、昭和61年度は各種走行物体を主塔後流域を比較的低い速度で、そして62年度に新たに設計製作した高速走行駆動装置によって模型を高速走行させて、走行速度/風速の走行物体の流体力におよぼす影響も明らかにした。その結果、後流域走行中においては速度欠損効果と後流渦による変動風の影響が顕著であり、それら二つの効果を明らかにするための補助実験として、Bluff bodiesが一様流に突入した際の流体力特性および後流中にスプリッタプレートを置いて、後流渦の発生を抑制した場合のBluff bodiesの流体力特性を求めた。一方、主塔から吐出される渦による走行物体の流体力に及ぼす効果が極めて重要であり、主塔後流渦の位相と走行物体の位置の相対的関係を調べる必要がある。そこで、主塔側面静圧の変動と走行物体の流体力を同時測定し、走行物体に作用する非定常流体力から後流渦による成分のみ抽出した。その結果、主塔から吐出される後流渦がある特定位相の時、走行物体に極端に大きい変動流体力が働き、さらに、主塔後流の流れ構造を調べ、変動流体力の変調現象との関連性を明らかにした。","subitem_description_type":"Abstract"},{"subitem_description":"The response of aerodynamic forces( a side and a drag forces ) on a vehicle model passing through a wake behind a main tower of a big suspension bridge has been investigated in a wind tunnel. A new device that makes a vehicle model run with a high speed has been constructed. We successfully extract a component due to a vortex-street from the unsteady side and drag forces on a vehicle model which has been neasured at the same time with an unsteady pressure on the side surface of a tower model. As additional experiments, a splitter-plate placed behind the tower model prevents the vortex street from shedding in the wake. Which makes the effects of the surviving velocity-gradient clear and a side and a drag forces on a vehicle which suddenly immerges in a uniform flow also has been measured.\nThen we have prepared five vehicle models: three cylindrical (2-dimensional) models and two box (3-dimensional) models with a rectangular and a aquare sections, respectively. The results of the present study may be summarized as follows: (1) When a cylindrical model passes through the wake of the tower with a splitter plate, the aerodynamic forces are influenced by the effects of an apparent angle of attack, the interference between the flows around a tower and a vehicle, and the effects of transient characteristics of flow. In the case of box models, the aerodynamic forces are governed by the effects of the angle of attack. (2) The fluctuation in a side-force exerted on a cylindrical or a box models corresponds to the fluctuation in a wind velocity due to the vortex-street behind a tower, and the unsteady forces with a constant phase-angle referred to the vortex-movement remarkably increase when the cehicle gets out of the wake. (3) The unsteady forces on a box model respond more rapidly to the cahnge in wind velocity than ones on a cylindrical model. (4) The periods of the unsteady forces on the vehicles are found to get out of order influenced by its passing through the vortex-street.","subitem_description_type":"Abstract"}]},"item_9_description_22":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"研究課題/領域番号:61550123, 研究期間(年度):1986-1988","subitem_description_type":"Other"},{"subitem_description":"出典：「横風変動を受けるBluff bodiesに作用する流体力の研究」研究成果報告書　課題番号61550123\n  (KAKEN：科学研究費助成事業データベース（国立情報学研究所）)\n　　　本文データは著者版報告書より作成","subitem_description_type":"Other"}]},"item_9_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.24517/00049369","subitem_identifier_reg_type":"JaLC"}]},"item_9_publisher_17":{"attribute_name":"公開者","attribute_value_mlt":[{"subitem_publisher":"金沢大学工学部"}]},"item_9_relation_28":{"attribute_name":"関連URI","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"https://kaken.nii.ac.jp/search/?qm=80013689"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://kaken.nii.ac.jp/search/?qm=80013689","subitem_relation_type_select":"URI"}},{"subitem_relation_name":[{"subitem_relation_name_text":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61550123/"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61550123/","subitem_relation_type_select":"URI"}},{"subitem_relation_name":[{"subitem_relation_name_text":"https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-61550123/615501231988kenkyu_seika_hokoku_gaiyo/"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-61550123/615501231988kenkyu_seika_hokoku_gaiyo/","subitem_relation_type_select":"URI"}}]},"item_9_version_type_25":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_ab4af688f83e57aa","subitem_version_type":"AM"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-12-11"}],"displaytype":"detail","filename":"TE-PR-OKAJIMA-A-kaken 1989-7p.pdf","filesize":[{"value":"174.8 kB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","url":{"label":"TE-PR-OKAJIMA-A-kaken 1989-7p.pdf","url":"https://kanazawa-u.repo.nii.ac.jp/record/43020/files/TE-PR-OKAJIMA-A-kaken 1989-7p.pdf"},"version_id":"f9336882-5e3c-46f4-8970-fe66f680302b"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"research report","resourceuri":"http://purl.org/coar/resource_type/c_18ws"}]},"item_title":"横風変動を受けるBluff bodiesに作用する流体力の研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"横風変動を受けるBluff bodiesに作用する流体力の研究"},{"subitem_title":"Studies on Unsteady Aerodynamic Forces on Vehicles under a Fluctuating Side-wind","subitem_title_language":"en"}]},"item_type_id":"9","owner":"18","path":["2845"],"pubdate":{"attribute_name":"公開日","attribute_value":"2017-12-11"},"publish_date":"2017-12-11","publish_status":"0","recid":"43020","relation_version_is_last":true,"title":["横風変動を受けるBluff bodiesに作用する流体力の研究"],"weko_creator_id":"18","weko_shared_id":-1},"updated":"2023-07-27T14:51:05.967003+00:00"}