OKADA Tetsuo

Affiliation

Faculty of Engineering, Division of Systems Research

Job Title

Professor

Research Fields, Keywords

Structural Analysis, Structural Design, Hull Structural Dynamics

Mail Address

E-mail address

Related SDGs




The Best Research Achievement in the last 5 years 【 display / non-display

  • 【Published Thesis】 A study on scantling formulae of plate members due to lateral pressure under the effect of axial loads(MARINE STRUCTURES)  2021.11

    【Published Thesis】 A study on whipping related double bottom response as well as its statistical characteristics based on full-scale measurements  2021.09

    【Book】 Strength of Materials - Fundamentals for structural strength design  2021.04

    【Book】 Practical Design of Ships and Other Floating Structures: Proceedings of the 14th International Symposium, PRADS 2019, September 22-26, 2019, Yokohama, Japan- Volume I  2021

    【Published Thesis】 Strength evaluation of intersection between stiffeners and primary supporting members in double hull structure  2020.11

Education 【 display / non-display

  • 1980.4
    -
    1986.3

    The University of Tokyo   Naval Architecture   Graduated

Degree 【 display / non-display

  • Doctor of Engineering

Campus Career 【 display / non-display

  • 2015.1
     
     

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Systems Research   Professor  

  • 2021.4
     
     

    Concurrently   Yokohama National UniversityInterfaculty Graduate School of Innovative and Practical Studies   Professor  

  • 2018.4
     
     

    Concurrently   Yokohama National UniversityGraduate school of Engineering Science   Department of Mechanical Engineering, Materials Science and Ocean Engineering   Professor  

  • 2017.4
     
     

    Concurrently   Yokohama National UniversityCollege of Engineering Science   Department of Mechanical Engineering, Materials Science and Ocean Engineering   Professor  

  • 2016.1
    -
    2018.3

    Concurrently   Yokohama National UniversityCenter for Oceanic Studies and Integrated Education   Professor  

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External Career 【 display / non-display

  • 2013.1
    -
    2014.12

    Japan Marine United Corporation  

  • 2010.4
    -
    2017.9

    Kyushu Institute of Technology   Graduate School of Engineering (Spring term each year)   Adjunct lecturer  

  • 2002.10
    -
    2012.12

    IHI Marine United Inc.  

  • 1986.4
    -
    2002.9

    Ishikawajima-Harima Heavy Industries, Co., Ltd.  

Academic Society Affiliations 【 display / non-display

  • 1986.4
     
     
     

    The Japan Society of Naval Architects and Ocean Engneers

Research Areas 【 display / non-display

  • Frontier Technology (Aerospace Engineering, Marine and Maritime Engineering) / Marine engineering

 

Research Career 【 display / non-display

  • Rational Structural Design Method for Ships and Offshore Structures

    Project Year:

  • Study on Structure of LNG Tanks

    Project Year:

  • Strength against Whipping Response of Large Container Ships

    Project Year:

Books 【 display / non-display

  • Strength of Materials - Fundamentals for structural strength design

    Tetsuo Okada, Keisuke Watanabe, Yasumi Kawamura, Yoshikazu Tanaka, Naoki Osawa, Hideaki Murayama( Role: Joint author ,  Ch.1~3, Sec.5.1~5.3, Sec.6.1~6.3, Ch.9, Appendix)

    Asakura Publishing Co., Ltd.  ( ISBN:978-4-254-23150-2

    Amazon

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    Total pages:288   Responsible for pages:1-74, 89-125, 133-175, 183-193, 219-222, 269-271   Language:Japanese Book type:Textbook, survey, introduction

  • Practical Design of Ships and Other Floating Structures: Proceedings of the 14th International Symposium, PRADS 2019, September 22-26, 2019, Yokohama, Japan- Volume I

    Sing-Kwan Lee, et al.( Role: Joint editor)

    Springer  ( ISBN:978-9811546235

    Amazon

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    Total pages:1074   Language:English Book type:Scholarly book

  • Practical Design of Ships and Other Floating Structures: Proceedings of the 14th International Symposium, PRADS 2019, September 22-26, 2019, Yokohama, Japan- Volume III

    James A. Coller, et al.( Role: Joint editor)

    Springer  ( ISBN: 978-9811546792

    Amazon

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    Total pages:772   Language:English Book type:Scholarly book

  • Practical Design of Ships and Other Floating Structures: Proceedings of the 14th International Symposium, PRADS 2019, September 22-26, 2019, Yokohama, Japan- Volume II

    Tetsuji Miyashita, et al.( Role: Joint editor)

    Springer  ( ISBN:978-9811546716

    Amazon

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    Total pages:858   Language:English Book type:Scholarly book

  • JIS Z 3410 (ISO 14731) /WES 8103 溶接管理技術者再認証資料 溶接施工管理技術の進歩

    日本溶接協会溶接管理技術者再認証審査・サーベイランス小委員会編( Role: Contributor ,  4.2.3(2)板厚影響)

    一般社団法人 日本溶接協会 

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    Total pages:304   Responsible for pages:144-145   Language:Japanese Book type:Textbook, survey, introduction

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Thesis for a degree 【 display / non-display

  • Application of Optimization Techniques to Hull Structural Design and Lofting

    Tetsuo Okada

    2006.6

    Doctoral Thesis   Single Work  

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    Design of ship hull structure can be divided into 3 categories, i.e. basic design to determine general arrangement and midship section, detailed design to determine detailed structural shape and scantlings, and production design / lofting to develop production and piece drawings for actual construction. Through all these stages, rational design can be accomplished by the application of optimization techniques.
    In this paper, the author touches upon:
    1.Optimizaion of hull structural analysis and mesh division for finite element analysis
    2.Optimization of midship initial design and detailed structural shape and scantlings utilizing genetic algorithm
    3.Optimization of nesting utilizing new algorithm
    and shows practical applicability of optimization techniques in these fields.

Papers 【 display / non-display

  • A study on the scantling formulae of a stiffener against lateral pressure under the simultaneous action of axial load

    Daoyang Zhang, Zihan Xu, Tetsuo Okada, Yasumi Kawamura, Ginga Hayakawa, Kinya Ishibashi, Hiroyuki K … Show more authors

    95   2024.3  [Reviewed]

    DOI

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier   Joint Work  

  • A digital twin for ship structures - R&D project in Japan

    Masahiko Fujikubo, Tetsuo Okada, Hideaki Murayama, Hidetaka Houtani, Naoki Osawa, Kazuhiro Iijima, … Show more authors

    Data-Centric Engineering   5   e7   2024.3  [Reviewed]

    DOI

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Cambridge University Press   Joint Work  

  • Uncertainty Analysis Method for Estimating Wave Parameters Based on Ship Responses (1st Report-Influence of the Ship Speed and Uncertainty in the measurement data)

    Chen Xi, Takami Tomoki, Oka Masayosi, Kawamura Yasumi, Okada Tetsuo

    Journal of the Japan Society of Naval Architects and Ocean Engineers   38 ( 0 )   65 - 74   2023.12  [Reviewed]

    DOI CiNii Research

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Japan Society of Naval Architects and Ocean Engineers   Joint Work  

    <p> The main purpose of this paper is to develop a new intrusive method to replace the traditional non-intrusive methods, such as Monte Carlo Simulation (MCS). By using the proposed method, the estimation of the stochastic response surface does not require time consuming multiple simulations, but the uncertainties in wave parameter can be estimated by optimizing the stochastic objective function only once. This study discusses the uncertainty in wave parameters estimated by using the present method when both the transfer function and the measurement data contain uncertainties. The validity of the present method is discussed by comparing its results to the results of uncertainty analyses through the MCS in which solutions of the deterministic problems are collected.</p>

  • Development of a floating-type ocean current turbine system and stress measurement of the floater in actual sea area demonstration test

    Dodo Yasushi, Okada Tetsuo

    Journal of the Japan Society of Naval Architects and Ocean Engineers   38 ( 0 )   141 - 154   2023.12  [Reviewed]

    DOI CiNii Research

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Japan Society of Naval Architects and Ocean Engineers   Joint Work  

    <p> The Kuroshio current flowing near the coastal areas of Japan is one of the strongest ocean currents in the world. In addition, it is expected to be a stable power source of renewable energy from the ocean. Recently various ideas are studied to utilize the Kuroshio current for power generation by researchers worldwide. But there has hardly ever been report on demonstration tests in actual sea areas and stress measurement of the demonstration machine.</p><p> We are developing a floating-type ocean current turbine system to utilize the Kuroshio current for power generation supported by NEDO. In this paper, we report the result of demonstration tests in the actual sea area. Especially the power curve was obtained from the measurement in the demonstration test and we confirmed that the estimated capacity factor using the power curve fulfills our initial expectation.</p><p> As a result of the stress measurement, good agreement was observed in general between the measured stresses and the FEM results. However, it was confirmed that with the turbine rotating, the hull may vibrate significantly with the frequencies corresponding to the multiples of the turbine rotation. This is considered to be a resonance of the hull at those frequencies, and although the absolute amplitude of the vibration is small and does not pose a problem for this demonstration test machine, it may become a design issue for future large-scale commercial machines.</p>

  • Bisection Constraint Method for Multiple-Loading Conditions in Structural Topology Optimization

    Thi, PT; Kawamura, Y; Okada, T

    APPLIED SCIENCES-BASEL   13 ( 24 )   2023.12  [Reviewed]

    DOI Web of Science

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    Language:English   Publishing type:Research paper (scientific journal)   Joint Work  

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Review Papers 【 display / non-display

  • Development of Local Scantling Formulae for Plate Members

    Tetsuo Okada

    ClassNK Technical Journal   6 ( 2 )   33 - 55   2022.12

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    Authorship:Lead author   Language:English   Publishing type:Internal/External technical report, pre-print, etc.   Single Work  

  • Development of Local Scantling Formulae for Plate Members

    Tetsuo Okada

    ClassNK Technical Journal   6 ( 2 )   27 - 40   2022.12

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    Authorship:Lead author   Language:Japanese   Publishing type:Internal/External technical report, pre-print, etc.   Single Work  

  • Study on thickness effect to fatigue strength and its feedback to the rules

    Tetsuo Okada, Norio Yamamoto, Masashi Mouri

    KANRIN   ( 60 )   27 - 37   2015.5

    DOI

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:THe Japan Society of Naval Architects and Ocean Engineers   Joint Work  

  • Strategy of the Industry and a Role of Welding to Build a Neo-Nippon - Ships (The Shipbuilders' Association of Japan)

    Yoshiyuki Nakajima, Tetsuo Okada

    Journal of the Japan Welding Society   82 ( 1 )   24 - 28   2013.1

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)   Publisher:The Japan Welding Society   Joint Work  

  • F.P.TANK内外板ロンジのスロット損傷について

    岡田哲男

    TechnoMarine   ( 882 )   14 - 16   2004.11

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)   Publisher:日本造船学会   Single Work  

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Awards 【 display / non-display

  • 日本船舶海洋工学会論文賞、日本海事協会賞

    2021.5   日本船舶海洋工学会、日本海事協会   大型コンテナ船に生じる弾性振動応答を考慮した疲労強度の簡易推定手法

    Individual or group name of awards:宮下哲治, 岡田哲男, 川村恭己, 関紀明, 花田崚

  • 横浜国立大学平成29年度ベストティーチャー賞

    2018.7   横浜国立大学  

    Individual or group name of awards:岡田哲男

  • Inui Award, The Society of Naval Architects of Japan

    1993.5   The Society of Naval Architects of Japan   Optimization of Ship Structural Design by Genetic Algorithm

    Individual or group name of awards:Tetsuo Okada

Presentations 【 display / non-display

  • Sea state estimation using measured ship responses as a key technology of digital twin for ship structures

    Tetsuo Okada

    4th International Conference on Smart & Green Technology for Shipping including Offshore Decommissioning (SMATEC 2023)  2023.4  ASRANet

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    Event date: 2023.4

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online (London)  

  • Focal points on strength learned from recent casualties and research activities

    岡田哲男  [Invited]

    Ultra large container ships  

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    Event date: 2018.11

    Language:English   Presentation type:Oral presentation (general)  

    Venue:大連理工大学  

    招待講演”Ultra large container ships – Focal points on strength learned from recent casualties and research activities”, 大連理工大学、2018年11月23日

Preferred joint research theme 【 display / non-display

  • Structural Strength, Analysis, Design of Ships and Offshore Structures

 

Charge of on-campus class subject 【 display / non-display

  • 2024   BJ Collaborative Special Lecture on Naval Architecture and Offshore Engineering C

    Interfaculty Graduate School of Innovative and Practical Studies

  • 2024   BJ Collaborative Special lecture on Naval Architecture and Offshore Engineering A

    Interfaculty Graduate School of Innovative and Practical Studies

  • 2024   Rule Making Procedures through Risk-Based Approaches Ⅱ

    Interfaculty Graduate School of Innovative and Practical Studies

  • 2024   Rule Making Procedures through Risk-Based Approaches Ⅰ

    Interfaculty Graduate School of Innovative and Practical Studies

  • 2024   Advanced Ship and Marine Structural Design Methodologies

    Graduate school of Engineering Science

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Charge of off-campus class subject 【 display / non-display

  • 先端産業システム特論ー船舶構造設計論

    Institution:九州工業大学

 

Committee Memberships 【 display / non-display

  • 日本海事協会技術委員会船体専門委員会

    2022.11  委員長

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    Committee type:Academic society 

  • 日本海事協会技術委員会船体専門委員会

    2022.8 - 2022.11  委員

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    Committee type:Academic society 

  • 日本海事協会技術委員会

    2022.6  技術委員

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    Committee type:Academic society 

  • Lloyd's Register Japan National Committee

    2022.5 

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    Committee type:Academic society 

  • NEDO技術委員会

    2021.9  NEDO技術委員

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    Committee type:Government 

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Social Contribution(Extension lecture) 【 display / non-display

  • 2018 Short Stay Program at Yokohama National University for participants from Shanghai Jiao Tong University, Dalian University of Technology and Danang University of Science and Technology

    工学府海洋宇宙システム工学コース  横浜国立大学  2018.2

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    Type:Lecture

    講義"Ultra large container ships - Focal points on strength issues learned from recent casualties and research activities"

  • 2016 International Summer School on Naval Architecture, Ocean Engineering and Mechanics

    Shanghai Jiao Tong University  Shanghai Jiao Tong University  2016.7

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    Type:Lecture

    講義"To Understand Practical Design of Ship Hull Structures through application of beam theory"

  • 2016 Short Stay Program at Yokohama National University for delegates of Shanghai Jiao Tong University, Federal University of Pernambuco and Dalian University of Technology

    工学府海洋宇宙システム工学コース  横浜国立大学  2016.2

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    Type:Lecture

    講義"Arch effect in the design of ship hull structures"

  • 日本船舶海洋工学会構造強度・材料溶接分野「夏の学校」2015講師

    日本船舶海洋工学会  九州大学、福岡県  2015.8

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    Type:Lecture

    「材料力学で理解する船体構造力学」講義

  • 2015 International Summer School on Naval Architecture, Ocean Engineering and Mechanics

    Shanghai Jiao Tong University  Shanghai Jiao Tong University  2015.7

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    Type:Lecture

    講義"To Understand Practical Design of Ship Hull Structures through application of beam theory"

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