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dc.contributor.author丸山, 敬ja
dc.contributor.author劉, 美智ja
dc.contributor.author佐々木, 寛介ja
dc.contributor.author井上, 実ja
dc.contributor.author井口, 正人ja
dc.contributor.author藤田, 英輔ja
dc.contributor.author西村, 宏昭ja
dc.contributor.alternativeMARUYAMA, Takashien
dc.contributor.alternativeLIU, Meizhien
dc.contributor.alternativeSASAKI, Kansukeen
dc.contributor.alternativeINOUE, Minoruen
dc.contributor.alternativeIGUCHI, Masatoen
dc.contributor.alternativeFUJITA, Eisukeen
dc.contributor.alternativeNISHIMURA, Hiroakien
dc.contributor.transcriptionマルヤマ, タカシja-Kana
dc.contributor.transcriptionササキ, カンスケja-Kana
dc.contributor.transcriptionイノウエ, ミノルja-Kana
dc.contributor.transcriptionイグチ, マサトja-Kana
dc.contributor.transcriptionフジタ, エイスケja-Kana
dc.contributor.transcriptionニシムラ, ヒロアキja-Kana
dc.date.accessioned2021-01-07T23:54:45Z-
dc.date.available2021-01-07T23:54:45Z-
dc.date.issued2020-12-
dc.identifier.issn0386-412X-
dc.identifier.urihttp://hdl.handle.net/2433/260820-
dc.description.abstractFalling properties of cinder models, non-simple shaped objects, were measured and three-dimensional falling trajectories were obtained by using video movies. Aerodynamic characteristics of cinder models were examined by the trajectory. The falling models imitated the configuration of cinders collected at the site of the experiment, Sakurajima volcano. Two types, one with sharp edges and one without sharp edges, were selected as representatives and a sphere was selected as reference model. The results showed that the drag coefficient varied with the falling velocity becoming smaller as the velocity increased. When the models fell with terminal velocity, the drag coefficients of the cinder models without and with sharp edges were about 0.5 and 0.6, respectively. The drag coefficient of the sphere model was about 0.3.en
dc.format.mimetypeapplication/pdf-
dc.language.isojpn-
dc.publisher京都大学防災研究所ja
dc.publisher.alternativeDisaster Prevention Research Institute, Kyoto Universityen
dc.subject動画解析ja
dc.subject噴石模型ja
dc.subject落下試験ja
dc.subject抗力係数ja
dc.subjectvideo motion analysisen
dc.subjectcinder modelsen
dc.subjectfall experimenten
dc.subjectdrag coefficienten
dc.subject.ndc519.9-
dc.title噴石模型を用いた噴石の落下性状の観測ja
dc.title.alternativeVideo Motion Analysis of Cinder Models through Fall Experimenten
dc.typedepartmental bulletin paper-
dc.type.niitypeDepartmental Bulletin Paper-
dc.identifier.ncidAN00027784-
dc.identifier.jtitle京都大学防災研究所年報. Bja
dc.identifier.volume63-
dc.identifier.issueB-
dc.identifier.spage182-
dc.identifier.epage189-
dc.textversionpublisher-
dc.sortkey17-
dc.address京都大学防災研究所ja
dc.address京都大学大学院工学研究科ja
dc.address京都大学防災研究所ja
dc.address一般財団法人 日本気象協会ja
dc.address京都大学防災研究所ja
dc.address国立研究開発法人 防災科学技術研究所ja
dc.address一般財団法人 防災研究協会ja
dc.address.alternativeDisaster Prevention Research Institute Kyoto Universityen
dc.address.alternativeGraduate School of Engineering, Kyoto Universityen
dc.address.alternativeDisaster Prevention Research Institute Kyoto Universityen
dc.address.alternativeJapan Weather Association, Japanen
dc.address.alternativeDisaster Prevention Research Institute Kyoto Universityen
dc.address.alternativeNational Research Institute for Earth Science and Disaster Resilience, Japanen
dc.address.alternativeAssociation for Disaster Prevention Researchen
dc.relation.urlhttp://www.dpri.kyoto-u.ac.jp/publications/nenpo/-
dcterms.accessRightsopen access-
dc.identifier.pissn0386-412X-
dc.identifier.jtitle-alternativeDisaster Prevention Research Institute Annuals. Ben
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