著者

橘 智也 正田 浩暉 Aiza Syamimi Binti Abd Rani 野間口 大 岡本 和也 藤田 喜久雄

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

pp.21-00222, (Released:2022-01-07)

参考文献数

21

被引用文献数

1

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Generating novel design concepts in the conceptual design phase is a cornerstone for producing innovative products. This paper proposes a method to support the generation of new design concepts from patent documents. The proposed method is based on the theory of novelty potential that the combination of abstract concepts leads to the generation of the novel design concept and that the distance between the combined abstract concepts correlates to the possibility of generating it. This research adopts the distributed word representation model of word2vec to extract abstract concepts from patent documents and to measure the concept distance. The two matrices are introduced to visualize the relationships of the extracted abstract concepts; the novelty potential matrix which shows the value of the novelty potential between the abstract concepts, and the void matrix which shows the numbers of existing patents of the abstract concepts. They help a designer to identify the combinations of abstract concepts that are high novelty potential and no existing patent. This paper demonstrates a case study of generating novel ideas of sports business with blockchain using the proposed method. The results show its uniqueness and effectiveness.

著者

野間口 大 中切 拓 藤田 喜久雄

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.853, pp.17-00122, 2017 (Released:2017-09-25)

参考文献数

22

被引用文献数

4

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Generation of new concepts in product design process serves as driving force of innovation. While many methods have been proposed for supporting design concept generation, it has rarely been supported in a systematic way, because its process is done in designer's implicit thought, and therefore, it is difficult to explicitly formalize the process. This paper proposes a model of designers' thinking process in concept generation called ECF cycle. It consists of three steps, i.e., (1) Externalization: the step for representing design concepts with drawings and language, (2) Classification: the step for classifying concepts with function trees, and (3) Finding voids: the step for finding potentials of new concepts called void, which is a defect of the classification. Then, this research builds a new method of concept generation incorporating the theory of solving inventive problems (TRIZ). The method is based on a quick reference table of TRIZ principles, which helps designers to create a new concept corresponding to a void found by ECF cycle. A case study of concept generation of new running shoes is demonstrated in order to verify the ability of the proposed method.

著者

山内 仁史 山﨑 慎太郎 矢地 謙太郎 藤田 喜久雄

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.855, pp.17-00320-17-00320, 2017 (Released:2017-11-25)

参考文献数

23

被引用文献数

1

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Multi-fidelity analysis has been used for reducing the calculation cost of evaluating the design solution, which is the most costly process in design optimization. In general, multi-fidelity analysis is applied to problems with continuous design variables, which are suitable to construct an approximate model of design space such as the response surface. On the other hand, combinatorial optimization problems, e.g., layout design, are difficult to apply the conventional multi-fidelity analysis, since the response surface cannot be constructed due to the property of the design variables. In this paper, we propose a multi-fidelity optimization method independent of the response surface and a simple analysis model for the method, and apply them to multi-disciplinary optimal layout design problem which is a complicated combinatorial optimization problem. The proposed analytical model, which adopts the concept of the explicit method, realizes for reducing the calculation time by simplifying the physical phenomenon. Then, the multi-fidelity optimization method is constructed by combining the proposed analysis model with the thermal network method which is a well-known thermal analysis method. We confirm that there is a strong correlation between the calculation result of the proposed analysis model and of a CAE software, and show that the proposed analysis model is suitable as a low fidelity model. The effectiveness of the proposed optimization method is demonstrated through numerical experiments.

著者

野間口 大 董 春祉 堀之内 貴大 藤田 喜久雄

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.854, pp.17-00167-17-00167, 2017 (Released:2017-10-25)

参考文献数

18

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The product design project includes many uncertainties. It causes risk that a project target cannot be accompolished within lead time. In order to flexibly handle the uncertainty and avoid the risk, adaptive planning that can switch easily to another plan by preparing options for a task is needed. When a challenging design alternative is difficult to be accompolished, a project manager should decide either to continue the design taking a risk or to switch to a conservative alternative disliking a risk. This paper proposes a new optimization-based project planning method that aims at a Pareto-optimal of the potential technical performane of designed product and a project failure risk. A task option model is employed for risk assesment of option-based project management. As its planning includes a number of various design variables and various evaluation indices, in order to solve such a complicated problem with a reasonable computation cost, this research separates the optimization problem into two phases, i.e., (i) defining of process architecture and organization structure and (ii) scheduling of resource allocation into activities. This paper demonstrates its application to a student formula design project. A proposed optimization method facilitates a project manager to explore various process plans with assessing their risks.

著者

古藤田 喜久雄 森岡 敬樹 山田 真 妹尾 高行

出版者

一般社団法人日本建築学会

雑誌

学術講演梗概集. B, 構造I (ISSN:09150129)

巻号頁・発行日

vol.1985, pp.93-94, 1985-09-10

著者

新野邊 幸市 高尾 学 本多 将和 川崎 徳幸 藤田 喜久雄 芦矢 嘉郎

出版者

THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

雑誌

日本航空宇宙学会誌 (ISSN:00214663)

巻号頁・発行日

vol.65, no.3, pp.81-82, 2017-03-05 (Released:2017-03-06)

著者

野村 勝也 高橋 篤弘 小島 崇 山崎 慎太郎 矢地 謙太郎 坊 大貴 藤田 喜久雄

出版者

The Institute of Electronics, Information and Communication Engineers

雑誌

電子情報通信学会論文誌 B (ISSN:13444697)

巻号頁・発行日

vol.J102-B, no.8, pp.669-673, 2019-08-01

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最適な構造物を数値計算で導出する手法であるトポロジー最適化をノイズフィルタの導体パターン設計に適用した.回路定数により支配的なノイズが異なるフィルタで最適化を行った結果,支配的なノイズに応じた構造変化が生じ,フィルタの性能が向上した.

著者

古藤田 喜久雄 若松 加寿江

出版者

公益社団法人地盤工学会

雑誌

土と基礎 (ISSN:00413798)

巻号頁・発行日

vol.36, no.12, pp.p19-24,図巻頭2p, 1988-12

被引用文献数

3

著者

野間口 大 中切 拓 藤田 喜久雄

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

pp.17-00122, (Released:2017-09-19)

参考文献数

22

被引用文献数

4

---

Generation of new concepts in product design process serves as driving force of innovation. While many methods have been proposed for supporting design concept generation, it has rarely been supported in a systematic way, because its process is done in designer's implicit thought, and therefore, it is difficult to explicitly formalize the process. This paper proposes a model of designers' thinking process in concept generation called ECF cycle. It consists of three steps, i.e., (1) Externalization: the step for representing design concepts with drawings and language, (2) Classification: the step for classifying concepts with function trees, and (3) Finding voids: the step for finding potentials of new concepts called void, which is a defect of the classification. Then, this research builds a new method of concept generation incorporating the theory of solving inventive problems (TRIZ). The method is based on a quick reference table of TRIZ principles, which helps designers to create a new concept corresponding to a void found by ECF cycle. A case study of concept generation of new running shoes is demonstrated in order to verify the ability of the proposed method.

著者

藤田 喜久雄 赤木 新介 廣川 敬康

出版者

日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.59, no.564, pp.2576-2583, 1993-08

著者

古藤田 喜久雄

出版者

公益社団法人地盤工学会

雑誌

土質工学会論文報告集 (ISSN:03851621)

巻号頁・発行日

vol.14, no.3, 1974-09-15

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最近の山留め工法の特長は無音無振動施工法でありつぎのような工法がある。場所打ちグイまたはモルタル注入グイ柱列, 土グイと建込み既製グイ併用, 建込み鋼管グイ柱列, 特殊建込みPCグイ柱列, RC造り連続地下壁など, これを本体工事の一部に使用する際にはつぎの点の検討が必要である。泥水中コンクリートの品質と鉄筋付着強度, 地下壁と本体の接続部(シャコネクターおよび鉄筋の溶接), 施工中に生じる残留応力および変形, 施工精度, 設計断面の確保, 各壁体エレメント間に付着する泥水被膜など。さらにこれをピヤと兼用する際にはつぎの点についても検討しなければならない。布状ピヤの支持力および沈下性状, 内柱基礎との支持力および沈下性状の相違, 地下壁に作用する偏心荷重の処理, 壁底に沈積するスライムの除去など。新工法の開発に際しては事前の載荷試験を行なうほか, 実際工事においても実験を繰返し, 経験を積み重ねて行く必要がある。日本建築センターに申請中のものに清水建設, 大林組, フジタ工業, 竹中工務店などの工法があり, その他の会社でも独自の研究開発が進められている。