{"created":"2023-06-20T15:07:31.874946+00:00","id":36895,"links":{},"metadata":{"_buckets":{"deposit":"401fcd1e-cb20-407f-9a87-c8b143f49d22"},"_deposit":{"created_by":1,"id":"36895","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"36895"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00036895","sets":["1887:1891","1896:1898:1913:1915"]},"author_link":["478092","478088","478091","478087","478090","478089"],"item_5_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"B-スプラインを用いた船型の系統的変形"}]},"item_5_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1997-01","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"202","bibliographicPageStart":"199","bibliographicVolumeNumber":"34","bibliographic_titles":[{"bibliographic_title":"航空宇宙技術研究所特別資料"},{"bibliographic_title":"Special Publication of National Aerospace Laboratory","bibliographic_titleLang":"en"}]}]},"item_5_description_14":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）","attribute_value_mlt":[{"subitem_description":"航空宇宙技術研究所 6-7 JUN. 1996 東京 日本","subitem_description_type":"Other"}]},"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":"National Aerospace Laboratory 6-7 JUN. 1996 Tokyo Japan","subitem_description_type":"Other"}]},"item_5_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"縦横のメッシュ状のスプラインネットで定義された、例えば船体のような滑らかな物体形状は、メッシュの交点を移動させることによって高い自由度で変形させることができる。しかし、この高い自由度はかえって実施作業を困難にする。まず、設計者である人間がこの変形作業を実施する場合、変形によって元の曲面の滑らかさが損なわれないためには、各交点の移動量が全体として滑らかに分布していなければならないが、設計者がそのような移動量を直接各交点で与えることはほとんど不可能である。メッシュを粗くすると、滑らかな分布を与えることは容易になるが、形状表現の自由度が低下する。次に、最適化アルゴリズムによって計算機が物体形状を自動的に変形させる場合には、メッシュの各交点での移動量を形状表現パラメータとすることが適当であるが、メッシュを細かくするとパラメータ数が飛躍的に大きくなり、計算量とパラメータ間の独立性の点で問題になる。また、メッシュを粗くすると、やはり表現力の点で問題が生じる。本報告は、粗いメッシュの問題点の例として、Bスプラインの基底関数の山の位置を連続的に変化させたとき、山の形状を保てないことを示す。次に、この問題点の解決法として、細かいメッシュを用いながら、少ないパラメータ数で変形を表現するグループ化を提案する。そしてその実現例として、船体形状をスプラインネットで表し、その一部に変形量をオーバラップさせて船尾形状を変形させた場合を示す。","subitem_description_type":"Abstract"}]},"item_5_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"The body shape, such as a hull form having a smooth surface, which is defined crosswise by the mesh-like spline nets, can be modified with high degree of freedom by moving the intersection points of the mesh. However, this high degree of freedom makes a practical modification work impractical instead. First, in case a human being as a designer is to carry out the modification work by himself, since the movements of the interaction points of the mesh should be distributed smoothly and entirely on the surface, in order to preserve the smoothness of the original curved surface without being hurt by the modification, it is almost impossible for the designer to give such movement directly at every intersection points. It surely becomes easy to give a smooth distribution on the surface by applying a coarse mesh, but the degree of freedom for representing the shape will be reduced. Secondary, in case a computer is to carry out a modification of the body shape automatically by an optimization algorithm, it will be appropriate to regard the movement at the every intersectional points as the body geometry parameters for representing the shape. But with use of the finer mesh, the more numbers of parameters will be increased rapidly, and the independence between the computation volume and the parameters will be degraded. On the other hand, by using a coarse mesh of net, a representational power of the mesh is degraded too. In this paper, as an example of problem for the case of coarse mesh, it was demonstrated that the shape of the hump has not been preserved, if the location of the humps of the basis functions for B-spline were changed continuously. Then, as a solution of the problem, it was proposed to group the parameters in order to represent the modification with less number of body geometry parameters, although a finer mesh was used. And as a practical application, the shape of the hull form at stern, which was represented first by using spline net, was modified by overlapping the movement with it.","subitem_description_type":"Other"}]},"item_5_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0000685036","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: NAL SP-34","subitem_description_type":"Other"}]},"item_5_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"航空宇宙技術研究所"}]},"item_5_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"National Aerospace Laboratory (NAL)"}]},"item_5_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0289-260X","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":"AN10097345","subitem_source_identifier_type":"NCID"}]},"item_5_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"船舶技術研究所"},{"subitem_text_value":"船舶技術研究所"},{"subitem_text_value":"船舶技術研究所"}]},"item_5_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Ship Research Institute"},{"subitem_text_language":"en","subitem_text_value":"Ship Research Institute"},{"subitem_text_language":"en","subitem_text_value":"Ship Research Institute"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"児玉, 良明"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"川島, 英幹"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"竹子, 春弥"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kodama, Yoshiaki","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kawashima, Hideki","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Takeshi, Haruya","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":"2020-02-10"}],"displaytype":"detail","filename":"nalsp0034036.pdf","filesize":[{"value":"411.4 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"nalsp0034036.pdf","url":"https://jaxa.repo.nii.ac.jp/record/36895/files/nalsp0034036.pdf"},"version_id":"ff388e07-b229-43a1-a1f4-f0167fb58fff"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"船型","subitem_subject_scheme":"Other"},{"subitem_subject":"Bスプライン","subitem_subject_scheme":"Other"},{"subitem_subject":"系統的変形","subitem_subject_scheme":"Other"},{"subitem_subject":"流体力学特性","subitem_subject_scheme":"Other"},{"subitem_subject":"陰的幾何学的法","subitem_subject_scheme":"Other"},{"subitem_subject":"スプラインネット","subitem_subject_scheme":"Other"},{"subitem_subject":"基底関数","subitem_subject_scheme":"Other"},{"subitem_subject":"最適化アルゴリズム","subitem_subject_scheme":"Other"},{"subitem_subject":"物体形状","subitem_subject_scheme":"Other"},{"subitem_subject":"船尾形状","subitem_subject_scheme":"Other"},{"subitem_subject":"タンカーモデル","subitem_subject_scheme":"Other"},{"subitem_subject":"ship hull form","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"B spline","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"systematic modification","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"fluid dynamic performance","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"implicit geometrical method","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"spline net","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"basis function","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"optimization algorithm","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"body geometry","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"stern shape","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"tanker model","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":"Systematic modification of ship hull forms using B-splines","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Systematic modification of ship hull forms using B-splines","subitem_title_language":"en"}]},"item_type_id":"5","owner":"1","path":["1891","1915"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"36895","relation_version_is_last":true,"title":["Systematic modification of ship hull forms using B-splines"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-20T21:29:35.438491+00:00"}