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Takeuchi Kenzen

  • Faculty of Engineering and Design
  • Department of Engineering and Design
  • Graduate School of Science for Creative Emergence
  • Division of Science for Creative Emergence
  • Associate Professor
Last Updated :2026/06/24

Researcher Information

Degree

  • Bachelor of Engineering（1997/03 Toyohashi University of Technology）
  • Master of Engineering（1999/03 Toyohashi University of Technology）
  • Doctor of Engineering（2002/03 Toyohashi University of Technology）

Research funding number

  • 90911686

J-Global ID

Research Interests

  • hyperelastic body   topology optimization   structural optimization   shape optimization   finite element method   

Research Areas

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Design engineering
  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Machine materials and mechanics

Academic & Professional Experience

  • 2021/04 - Today  Kagawa UniversityFaculty of Engineering and DesignLecturer

Education

  • 1999/04 - 2002/03  Toyohashi University of Technology  Graduate School of Engineering  博士後期課程 機械・構造システム工学専攻
  • 1997/04 - 1999/03  Toyohashi University of Technology  Graduate School of Engineering  修士課程 機械システム工学専攻
  • 1995/04 - 1997/03  Toyohashi University of Technology  Faculty of Engineering  機械システム工学課程
  • 1990/04 - 1995/03  高松工業高等専門学校  機械工学科

Association Memberships

  • 日本応用数理学会   自動車技術会   日本側弯症学会   日本機械学会   

Published Papers

  • 入学当初の演習クラスにおいて挙手と発言の絶えない運営の実践と他教員への展開―オンライン授業と対面授業での事例から―
    山中隆史; 勝又暢久; 北村尊義; 竹内謙善; 李セロン
    初年次教育学会誌 初年次教育学会 16 (1) 72 - 80 2024/03 [Refereed]
  • Mai NONOGAWA; Kenzen TAKEUCHI; Hidenaga TAKAHASHI; Hideyuki AZEGAMI
    Mechanical Engineering Journal Japan Society of Mechanical Engineers 10 (5) 1 - 17 2187-9745 2023/09 [Refereed]
  • AZEGAMI Hideyuki; ONO Shinjiro; TAKEUCHI Kenzen; KIKUCHI Takahiro; MICHIWAKI Yukihiro; HANYU Keigo; KAMIYA Tetsu
    Journal of Biomechanical Science and Engineering The Japan Society of Mechanical Engineers 17 (1) 21-00254 - 21-00254 2022
  • Mai Nonogawa; Seigo Nakaya; Masashi Isobe; Kenzen Takeuchi; Hideyuki Azegami
    MECHANICAL ENGINEERING JOURNAL 8 (5) 2187-9745 2021
  • Mai Nonogawa; Kenzen Takeuchi; Hideyuki Azegami
    STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION 62 (3) 1535 - 1546 1615-147X 2020/09
  • Hideyuki Azegami; Satoshi Kaizu; Kenzen Takeuchi
    JSIAM Lett. 3 1 - 4 2011
  • Hideyuki Azegami; Kenzen Takeuchi
    INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS 3 (1) 21 - 33 0219-8762 2006/03
  • Buckling and bone modeling as factors in the development of idiopathic scoliosis.
    Manabu Goto; Noriaki Kawakami; Hideyuki Azegami; Yukihiro Matsuyama; Kenzen Takeuchi; Ryu Sasaoka
    Spine 28 (4) 364 - 70 2003/02
  • 脊柱特発性側彎症の成因に関する力学模型実験 精密な脊柱力学模型を用いた検討
    笹岡 竜; 竹内 謙善; 畔上 秀幸; 村地 俊二; 鬼頭 純三; 石田 義人; 川上 紀明; 牧野 光倫; 松山 幸弘; 後藤 学; 稲生 秀文; 吉原 永武
    脊柱変形 日本側彎症学会 17 (1) 18 - 22 0911-6826 2002/12
  • Computational Study on the Etiology of Idiopathic Scoliosis : Buckling Hypothesis Induced by Bone Modeling against Gravity
    TAKEUCHI Kenzen; SASAOKA Ryu; AZEGAMI Hideyuki; MURACHI Shunji; KITOH Junzoh; ISHIDA Yoshito; KAWAKAMI Noriaki; MAKINO Mitsunori
    Transactions of the Japan Society for Computational Engineering and Science 日本計算工学会 4 153 - 160 1344-9443 2002/05
  • Numerical Simulation on Etiology of Idiopathic Scoliosis : Modal Investigation
    TAKEUCHI Kenzen
    脊柱変形 : 日本側彎症研究会会誌 = Spinal deformity : the journal of Japanese Scoliosis Society 16 (1) 11 - 16 0911-6826 2001/12
  • Large-Scale Parallel Shape Optimization Using Hierarchical Domain Decomposition with Traction Method
    YOSHIMURA Shinobu; OSHIO Norihiko; KAWAI Hiroshi; AZEGAMI Hideyuki; TAKEUCHI Kenzen
    Journal of the Japan Society for Simulation Technology Japan Society for Simmulation Technology 20 (4) 296 - 302 0285-9947 2001/12
  • Kenzen Takeuchi; Hideyuki Azegami; Shunji Murachi; Junzoh Kitoh; Yoshito Ishida; Noriaki Kawakami; Mitsunori Makino; Hiroshi Wada
    JSME International Journal, Series C: Mechanical Systems, Machine Elements and Manufacturing 44 (4) 1059 - 1064 1344-7653 2001/12
  • Sensitivity Analysis with Respect to Idiopathic Scoliosis : Application of Structural Optimization Theory
    TAKEUCHI Kenzen
    脊柱変形 : 日本側彎症研究会会誌 = Spinal deformity : the journal of Japanese Scoliosis Society 15 (1) 24 - 27 0911-6826 2000/12
  • 特発性側彎症の成因に関する数値シミュレーション-数値モデルの精密化-
    竹内謙善
    脊柱変形 14 25 - 28 1999

Books etc

  • 大学生からはじめるロジカルシンキング
    勝又暢久; 竹内謙善; 山中隆史 (Joint work)学術図書出版社 2024/03 9784780612585 50
  • 応用数理ハンドブック
    薩摩順吉; 大石進一; 杉原正顯 (Contributor530～531頁)朝倉書店 2013

Conference Activities & Talks

  • 材料定数同定問題における多様な解の獲得  [Not invited]
    福原 颯; 平手 利昌; 竹内 謙善
    日本応用数理学会研究部会連合発表会  2024/03  長岡技術科学大学  日本応用数理学会
  • 固有振動数に基づく材料定数同定問題の一解法（ハイブリッド法の提案）  [Not invited]
    福原 颯; 都築 凜成; 平手 利昌; 竹内 謙善; 荒川 雅生
    日本機械学会設計工学・システム部門講演会  2023/09  金沢商工会議所会館  日本機械学会
  • モータステータ鉄心を対象とした材料定数同定合わせこみに関する一考察（ハイブリッド法の適用可否を検証）  [Not invited]
    平手 利昌; 川瀬 弘明; 福原 颯; 都築 凜成; 竹内 謙善; 荒川 雅生
    日本機械学会設計工学・システム部門講演会  2023/09  金沢商工会議所会館  日本機械学会
  • Proposal of Identification Method for Material Constants of Industrial Equipment based on Hybrid of Surrogate Optimization and Adjoint Variable Method  [Not invited]
    So Fukuhara; Toshiaki Hirate; Kenzen Takeuchi; Masao Arakawa
    The 15th World Congress of Structural and Multidisciplinary Optimization (WCSMO-15)  2023/06  Cork, Ireland  International Society for Structural and Multidisciplinary Optimisation
  • Study on Solving the Squared Error Minimization Problem  [Not invited]
    TAKEUCHI Kenzen; ISHII Taichi; FUKUHARA So
    日本応用数理学会２０２２年度年会講演予稿集  2022/09
  • Solution of material constant identification problem based on natural frequency  [Not invited]
    FUKUHARA So; HIRATE Toshiaki; TAKEUCHI Kenzen; ARAKAWA Masao
    日本応用数理学会２０２２年度年会講演予稿集  2022/09
  • Practices and issues of product design based on topology optimization method  [Not invited]
    KAWAKAMI Kippei; TAKEUCHI Kenzen; ARAKAWA Masao
    日本応用数理学会２０２２年度年会講演予稿集  2022/09
  • Identification Method for Material Constants of Industrial Equipment Based on the Adjoint Variable Method
    So Fukuhara; Toshiaki Hirate; Kenzen Takeuchi; Masao Arakawa
    Asian Congress of Structural and Multidisciplinary Optimization 2022
  • Experimental identification on natural frequency of Industrial Equipment using multi-objective optimization method  [Not invited]
    Toshiaki Hirate; So Fukuhara; Kenzen Takeuchi; Masao Arakawa
    Asian Congress of Structural and Multidisciplinary Optimization 2022
  • FreeFEM による超弾性体の有限変形解析と形状最適化への応用  [Not invited]
    畔上秀幸; 竹内謙善
    日本応用数理学会2021年度年会  2021/09
  • ニット素材を対象とする超弾性構成則の提案  [Not invited]
    竹内謙善; 野々川舞; 高橋秀長; 畔上秀幸
    日本応用数理学会2021年度年会  2021/09
  • 美的評価指標を考慮した位相最適化手法の提案  [Not invited]
    竹内謙善; 壺井丈二; 荒川雅生
    日本応用数理学会2021年度年会  2021/09
  • Experimental identification on natural frequency of motor stator core using multi-objective optimizing method
    HIRATE Toshiaki; KAWASE Hiroaki; NAMBA Nobuhiro; TAKEUCHI Kenzen; ARAKAWA Masao
    The Proceedings of Design & Systems Conference  2020  The Japan Society of Mechanical Engineers
     

    Dynamic FEM analysis is valid for designing rotating machinery to reduce its vibration problem when we may ensure enough accuracy of the analysis. Surrogate multiple objective optimization method is one of the most effective methods for structural identification improving the FEM analysis model of a structure to adjust the natural frequency analysis results to the experimental results. In this study the structural identification method is applied to coil mounted stator core of an induction motor to determine the Young's modulus of the principal components on the FE model minimizing the analysis errors of the natural frequencies of the 2-lobe and 3-lobe circular modes to the corresponding experimental results. The accurate FE model of the end-windings is obtained by this method.

  • Identification Method for Material Constants of Industrial Electric Equipment Based on the Adjoint Variable Method
    NAMBA Nobuhiro; HIRATE Toshiaki; ARAKAWA Masao; TAKEUCHI Kenzen
    The Proceedings of Design & Systems Conference  2020  The Japan Society of Mechanical Engineers
     

    There are various methods for estimating the vibration characteristics. One of the reasons for this is the need to reduce noise and vibration in industrial electrical equipment from the viewpoint of environmental loading. We focus on transformers as one of the equipment. In transformers, coils and iron cores stretch by magnetostriction and generate noise on the boundaries of them. Precise estimation of the vibration characteristics of transformers using finite element method is important to reduce the noise. However, the specification of material constants of iron cores is very difficult because cores consist of laminated thin steel plates. The slippage between plates affects macroscopic material constants. In this paper, the Newton method based on the Adjoint variable method is applied to obtain the experimental values of eigenfrequencies, which are the characteristics of vibration. In addition, the identification of material constants is verified so that the error between the experimental and the measured values is zero.

  • Identification of muscle activity in swallow motion using medical image and anatomical data
    Azegami Hideyuki; Ono Shinjiro; Takeuchi Kenzen; Michiwaki Yukihiro; Kikuchi Takahiro
    The Proceedings of Mechanical Engineering Congress, Japan  2020  The Japan Society of Mechanical Engineers
     

    This paper presents a formulation to identify the muscle activities from shape variation of organs in a swallow motion. Using a tongue model consisting of hyper elastic body and multi-muscle fibers, we consider that the shape variation is realized by the compulsory displacement on the boundary, and that muscle activities are assumed as initial stresses generated in the directions of the muscle fibers. The identification problem of the muscle activities is formulated using the magnitudes of the initial stresses as the design variables and the L2 squared norm of the reaction force on the boundary by the compulsory displacement as the cost function of minimization. Solution of the problem is presented based on the scheme using the H1 gradient method for topology optimization problem of density type. A numerical example using a previously developed data is introduced to show the effectiveness of the present approach.

  • Proposal of identification method for material constants by the adjoint variable method for industrial electrical equipment
    Namba Nobuhiro; Hirate Toshiaki; Takeuchi Kenzen; Arakawa Masao
    The Proceedings of Conference of Chugoku-Shikoku Branch  2020  The Japan Society of Mechanical Engineers
  • Identification of muscle activity in tongue’s motion considering distinguished muscle fibers  [Not invited]
    Shinjiro Ono; Hideyuki Azegami; Kenzen Takeuchi; Yukihiro Michiwaki; Takahiro Kikuchi
    Asian Congress of Structural and Multidisciplinary Optimization  2020
  • Topology Optimization Method based on Mechanical and Artistic Evaluation Indices  [Not invited]
    Joji Tsuboi; Kenzen Takeuchi; Masao Arakawa
    Asian Congress of Structural and Multidisciplinary Optimization  2020
  • Identification Method for Material Constants of Industrial Electric Equipment Based on the Adjoint Variable Method  [Not invited]
    Nobuhiro Namba; Toshiaki Hirate; Kenzen Takeuchi; Masao Arakawa
    Asian Congress of Structural and Multidisciplinary Optimization  2020
  • Constitutive Law for Knitted Fabrics as a Hyperelastic Body and Its Parameter Identification  [Not invited]
    Kenzen Takeuchi; Mai Nonogawa; Hidenaga Takahashi; Hideyuki Azegami
    Asian Congress of Structural and Multidisciplinary Optimization  2020
  • Optimum design of running shoes with desired deformation property  [Not invited]
    Mai Nonogawa; Kenzen Takeuchi; Hideyuki Azegami
    The 13th World Congress on Structural and Multidisciplinary Optimization  2019
  • Identification of muscle activity in tongue's motion through medical image data  [Not invited]
    Shinjiro Ono; Hideyuki Azegami; Kenzen Takeuchi; Yukihiro Michiwaki; Takahiro Kikuchi; Keigo Hanyuu; Testu Kamiya
    The 13th World Congress on Structural and Multidisciplinary Optimization  2019
  • Formulation of muscle activity identification problem from shape observation and its solution
    Azegami Hideyuki; Kurimoto Ryota; Saito Genji; Takeuchi Kenzen; Michiwaki Yukihiro; Kikuchi Takahiro; Hanyuu Keigo; Kamiya Testu
    The Proceedings of OPTIS  2018  The Japan Society of Mechanical Engineers
     

    This paper presents a formulation and solution of an identification problem of the muscle activities in an organ when a deformation of the organ was observed on boundary. This study is motivated by a medical interest of wishing to know the mechanism of swallow motion and cause of aspiration. In order to elucidate the mechanism, it is necessary to identify the contraction movement of the muscles. In this study, we assume that an organ consists of hyper elastic body, and the contraction movement is a finite deformation due to the generation of the anisotropic and inelastic strain. The strain is modeled as a function of a design variable which controls the contraction rate. Based on the assumption, we formulate a state determination problem of hyper elastic deformation by the compulsory displacement on the observed boundary using a given data. Using its solution, we define an objective function by the integral of the squared norm of the reaction force over the observed boundary, and construct an optimization problem seeking the design variable that minimize the objective function. Solution of the problem is presented as an iterative scheme using the H1 gradient method for topology optimization problem of density type. Numerical examples for a cubic and cylinder bodies demonstrste that the deformations are reproduced by the identified design variables.

  • Muscle activity identification based on shape observation  [Not invited]
    Hideyuki Azegami; Ryota Kurimoto; Genji Saito; Kenzen Takeuchi; Yukihiro Michiwaki; Takahiro Kikuchi; Keigo Hanyuu; Testu Kamiya
    The Asian Congress of Structural and Multidisciplinary  2018
  • Shape Derivative Formula of Domain Integral Type  [Not invited]
    Hideyuki Azegami; Kenzen Takeuchi; Yusuke Naritomi
    The 11th World Congress on Structural and Multidisciplinary Optimization (WCSMO-11)  2015
  • Shape derivative formula of domain integral type
    畔上 秀幸; 竹内 謙善; 成富 佑輔
    最適化シンポジウム OPTIS  2014  日本機械学会
  • 位相・形状最適化の後処理における CAD データの自動生成に関する研究  [Not invited]
    石坂尚也; 竹内謙善
    日本応用数理学会 2011年度年会  2011
  • 121 Shape Optimization Technique Considering Interference with the Other Parts
    TAKEUCHI Kenzen
    The Proceedings of OPTIS  2010  The Japan Society of Mechanical Engineers
     
    This paper describes a shape optimization technique considering the interference with the other parts or tools. During the shape optimization of mechanical structures, some geometrical constraint conditions, namely, its manufacturing process, or interference with the other parts or tools must be considered. The author and the other researchers developed some shape restriction techniques based on the traction method in previous researches. However, the usability and the stability of them are sometimes insufficient for the consideration of interference in actual applications. In this research, a measurement of the part of the design domain overlapped with the interference domain is evaluated and defined as a constraint function. According to this definition, the consideration of interference can be rewritten to the constraint condition of that the constraint function is zero. This approach was implemented based on a general-purpose structural optimization software, and applied to some optimization problems. The validity of this approach was confirmed by numerical results.
  • 110 Optimization of vehicle body structure by level set method
    YAMAMOTO Takashi; YAMADA Takayuki; NISHIWAKI Shinji; TAKEUCHI kenzen; ISHII Keizo
    The Proceedings of OPTIS  2010  The Japan Society of Mechanical Engineers
     
    In this paper we propose a new method to design a reinforcement for a given thin shell structure such as body structure of a vehicle by utilizing a structural optimization method based on the level set method. In this method the allowed design space is defined around the given structure and the optimal reinforcement is created utilizing the level set based optimization method. The proposed method can give a designer more useful information of topology and shape of the reinforcement than the conventional topology or shape structural optimization methods. We demonstrate the efficiency of the method by showing a result where the optimal reinforcement is found for a simple given structure made by thin shell.
  • 462 Application of Topology Optimization based on H^1 Gradient Method for Vibration Problem
    FURUYA Kohei; TAKEUCHI Kenzen
    The Proceedings of the Dynamics & Design Conference  2008  The Japan Society of Mechanical Engineers
     
    Structural topology optimization has been applied to the various problems, and accepted into industrial as a useful tool. But, in some case, numerical instabilities such as checkerboard patterns appear. For the problem, smoothing method called H^1 gradient method has been proposed. In this paper, applying H^1 gradient method to maximizing eigenvalue problem, it is shown that the smooth topology can be obtained. And, showing difficulty of applying the topology optimization to vibration problem, the new approach to maximize eigenvalue considering static stiffness is proposed.
  • Shape optimization of contacting elastic continua
    SUGIMOTO Akinobu; SASAOKA Ryu; TAKEUCHI Kenzen; AZEGAMI Hideyuki
    NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan  2007  National Committee for IUTAM
     
    In design of shoes or prosthetics, it is desired to control contactstress appropriately. In the previous study, a possibility to design anelastic continuum made by bonding two materials that deforms with anassigned deformation under a constant traction force was presented bysolving the shape optimization problem of the interface. In this study,assuming that the traction force is generated by elastic contact withother elastic continuum, a shape optimization problem of the interfaceto uniformize contact stress is dealt. For elastic deformation,geometrical nonlinearity is considered. Contact phenomenon is formulatedbased on the Lagrange multiplier method. For reshaping method, thetraction method is used to keep smoothness of the interface.
  • A smoothing method for topology optimization problems of continua
    NONOGAWA Mai; SASAOKA Ryu; TAKEUCHI Kenzen; AZEGAMI Hideyuki
    NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan  2007  National Committee for IUTAM
     
    Topology optimization problems of continua have been solved as findingproblem of the optimum distribution of density using the homogenizationmethod or the density method to relate density to stiffness. In thesolution, it has been known that numerical instabilities such ascheckerboard patterns or mesh-dependencies may appear in the caseassuming constant distribution of density in element-by-element, andthat in the case assuming continuous distribution of density thesenumerical instabilities can be prevented. In this study, a method basedon the smoothing gradient method that was presented by one of theauthors is presented. Based on the method, improvement of the smoothnesscan be discussed in the mathematical view.
  • 3138 A Shape Restriction Technique Using Multipoint Constraint on Traction Method
    TAKEUCHI Kenzen; TSUKINO Makoto
    The proceedings of the JSME annual meeting  2007  The Japan Society of Mechanical Engineers
     
    In structural optimization, the shape of structure must be satisfied with some constraint conditions considering manufacturing process, mechanical symmetry and outward appearance. This paper describes a shape optimization technique for symmetrical structures using multipoint constraints based on traction method. Shape variation of traction method is obtained as a solution of a boundary value problem of linear elastic continuum loaded with traction in proportion to the shape gradient. In the shape variation analysis, multipoint constraints are introduced to keep the symmetry of the structure. This technique is applied to a simple optimization problem of circular cross section cantilever. The validity of this technique is confirmed by comparison between theoretical result and the numerical result. Furthermore, a numerical result of a shape optimization problem of a road wheel is shown as a practical application.
  • 力法に基づく構造・音響連成問題における音圧最小化  [Not invited]
    竹内謙善; 丸山新一
    自動車技術会2007年秋季大会学術講演会  2007
  • Shape Optimization of Acoustic Musical Instruments  [Not invited]
    Kouhei Shintani; Kenzen Takeuchi; Hideyuki Azegami
    the third Asian-Pacific Congress on Computational Mechanics  2007
  • An Implementation of H1 Gradient Method for Topology Optimization of Continua  [Not invited]
    Mai Nonogawa; Kenzen Takeuchi; Hideyuki Azegami
    the third Asian-Pacific Congress on Computational Mechanics  2007
  • W09(1) 位相・形状最適化技術の実用化(設計最適化ソフトの最前線)
    竹内 謙善
    年次大会講演資料集  2006  一般社団法人 日本機械学会
  • 固有振動数に基づく形状同定解析
    竹内謙善
    日本応用数理学会2006年度年会  2006
  • 1903 Shape Optimization Method for Thermal Stress Minimization of Thermoelastic Continua
    TSUKINO Makoto; TAKEUCHI Kenzen; KATAMINE Eiji
    The Proceedings of The Computational Mechanics Conference  2005  The Japan Society of Mechanical Engineers
  • Development of Shape Restriction Technique for Traction Method
    TAKEUCHI Kenzen
    The Proceedings of OPTIS  2004  The Japan Society of Mechanical Engineers
     
    In this paper, a nonparametric boundary shape optimization technique based on traction method considering die drawing and draft angle is proposed. Shape variation in general traction method is obtained as a solution of a boundary value problem of linear elastic continuum loaded with traction in proportion to the shape gradient of objective functional or constraint functional. A penalty term, denotes a virtual work by draft angle variation of boundary surface, is introduced into the equation oi virtual work in the shape variation analysis. An example of shape optimization problems considering the die drawing was analyzed using the technique. Appropriate result shape is obtained without any remarkable additional cost such as memory area, calculation time and troublesome optimization data preparation.
  • A practical implementation of shape and topology optimization for structural design  [Not invited]
    Kenzen Takeuchi
    International Workshops on Advances in Computational Mechanics  2004
  • A shape restriction technique on traction method with respect to die drawing  [Not invited]
    Kenzen Takeuchi
    The Third China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems  2004
  • Smoothing Shape Optimization Method: Traction Method Using Robin Condition  [Not invited]
    Hideyuki Azegami; Kenzen Takeuchi
    WCCM VI in conjunction with APCOM'04  2004
  • Large-Scale Shape Optimization Analysis Using the Domain Decomposition Method
    ASAGA Yasuo; TAKEUCHI Kenzen; AZEGAMI Hideyuki; YOSHIMURA Shinobu
    計算工学講演会論文集  2002/05
  • Comparative study of shape and topology optimization analyses
    MARUYAMA Shinichi; TAKEUCHI Kenzen; AZEGAMI Hideyuki
    The Proceedings of OPTIS  2002  The Japan Society of Mechanical Engineers
     
    This paper presents numerical results of boundary shape and topology optimization problem for a three-dimensional arm design of linear elastic continuum with respect to minimization problem of volume under a mean compliance constraint. For boundary shape optimization, a program using a spring-loaded traction method was used. The spring-loaded traction method was proposed as an improvement of the traction method in convergence and a procedure for determining the velocity of the domain variation by solving a displacement of a pseudo-elastic body defined in the domain with distributed spring on boundary by the loading of a pseudo-external force in proportion to the negative value of the shape gradient. For topology optimization, a commercial program combining the topology optimization method based on the homogenization method and the basis vector method was employed. From the results of analyses for a three-dimensional arm design problem by the two kinds of optimization programs, it was demonstrated that there was the case that the only topology optimization obtained limited result.
  • Solution to Boundary Shape Optimization Problem of Linear Elastic Continua with Prescribed Natural Vibration Mode  [Not invited]
    Inzarulfaisham Abd Rahim; Taiki Aoyama; Kenzen Takeuchi; Hideyuki Azegami
    The Second China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems  2002
  • Improvement of Convergency in Shape Optimization Scheme by Traction Method
    TAKEUCHI Kenzen; AZEGAMI Hideyuki
    日本機械学会2001年度年次大会講演論文集  2001/08  日本機械学会
     
    This paper presents an improvement of the traction method that was proposed as a solution of shape optimization problems of domain boundaries in which boundary value problems of partial differential equations are defined. Using the theory of the gradient method in Hilbert space the principle of the traction method is presented. Based on the principle a new method is proposed by selecting another bounded coercive bilinear form from the previous method. The proposed method obtains domain variation with solution of a boundary value problem with the Robin condition using the shape gradient. With respect to a three-dimensional bar problem with notch that was not solved with the previous method the proposed method obtained smooth convergence.
  • A STUDY ON STABILITY OF SPINE DURING GROWTH PERIOD : AROUND ETIOLOGY OF IDIOPATHIC SCOLIOSIS
    AZEGAMI Hideyuki; KODAMA Kazumi
    計算工学講演会論文集  2001/05
  • LARGE-SCALE PARALLEL SHAPE OPTIMIZATION USING ADVENTURE SYSTEM WITH TRACTION METHOD
    YOSHIMURA S.; OSHIO N.; KAWAI H.; AZEGAMI H.; TAKEUCHI K.
    計算工学講演会論文集  2001/05
  • K-0208 Improvement of Convergency in Shape Optimization Scheme by Traction Method
    TAKEUCHI Kenzen; AZEGAMI Hideyuki
    The proceedings of the JSME annual meeting  2001  The Japan Society of Mechanical Engineers
     
    This paper presents an improvement of the traction method that was proposed as a solution of shape optimization problems of domain boundaries in which boundary value problems of partial differential equations are defined. Using the theory of the gradient method in Hilbert space the principle of the traction method is presented. Based on the principle a new method is proposed by selecting another bounded coercive bilinear form from the previous method. The proposed method obtains domain variation with solution of a boundary value problem with the Robin condition using the shape gradient. With respect to a three-dimensional bar problem with notch that was not solved with the previous method the proposed method obtained smooth convergence.
  • Study on Treatment with Respect to Idiopathic scoliosis (Sensitivity Analysis based on Buckling Theory)
    TAKEUCHI Kenzen; SASAOKA Ryu; AZEGAMI Hideyuki; Kawakami Noriaki
    日本機械学会2000年度年次大会講演論文集  2000/07  日本機械学会
     
    In the previous work, the authors presented a hypothesis using numerical simulations with a finite element model of spine that thoracic idiopathic scoliosis is a buckling phenomenon of the fourth mode induced by growth of the thoracic vertebral bodies. In this study, a sensitivity function with respect to the maximization problem of the critical growth of thoracic vertebral bodies to the fourth bucking mode was derived based on the Lagrange multiplier method. Accepting the buckling pypothesis, the numerical result of the sensitivity function denotes that the high parts in sensitivity function indicate significant parts to prevent the occurrence of thoracic idiopathic scoliosis.
  • Parallel Shape Optimization Using PC Cluster
    OSHIO Norihiko; YOSHIMURA Shinobu; KAWAI Hiroshi; AZEGAMI Hideyuki; TAKEUCHI Kenzen
    The Proceedings of The Computational Mechanics Conference  2000  The Japan Society of Mechanical Engineers

MISC

Industrial Property Rights

  • 特許第3946699号:領域形状最適化方法    2007/07/18
    畔上秀幸, 竹内謙善  公益財団法人名古屋産業科学研究所

Awards & Honors

  • 2015/09 日本応用数理学会 論文賞 JSIAM-Letters 部門
     Regular solution to topology optimization problems of continua 
    受賞者: 畔上秀幸;海津聰;竹内謙善
  • 2006/03 日本応用数理学会 若手優秀講演賞
     固有振動数に基づく形状同定解析
  • 2005/03 日本機械学会 奨励賞（技術）
     構造最適設計ソフトウェアOPTISHAPE- TSの'力法'によるノンパラメトリック形状最適化モジュールの開発
  • 1995/03 日本機械学会 畠山賞

Research Grants & Projects

  • 多目的関数最適化による同期の「両立メカニズム」の解明とエネルギー論の構築
    日本学術振興会：科学研究費助成事業
    Date (from‐to) : 2024/04 -2028/03 
    Author : 田中 久陽; 徳田 功; 長谷川 禎彦; 竹内 謙善
  • 言葉によるエンジニアリング
    日本学術振興会：科学研究費助成事業
    Date (from‐to) : 2022/04 -2025/03 
    Author : 荒川 雅生; 平見 尚隆; 勝又 暢久; 竹内 謙善
     
    「言葉によるエンジニアリング」とは，製品開発設計時において，その成否はターゲットユーザを確定し，彼らがもつ潜在的な要求（Wants）を見出し，その情報をいかに正確に設計者に伝えるかにあると言う仮説の下に考えられた研究テーマである．Wantsはそもそも明文化されておらず，ターゲットユーザが確認しうる既存の製品を基に，主に言語によって表現されるものである．一方，設計者は基本的に定量的な評価を基に製品作りに臨むため，このギャップを埋める必要がある． ３つの方針のもとに研究を進めている．一つ目が性能とターゲットユーザの評価を同一平面で可視化をして，開発方針を決定する方向性を見出す試みである．製品例としてロボット掃除機を対象として，メキシコ人，日本人へのアンケートを実施した．最終年度ではその結果を受けて，開発方針を決定するための手法を確立していく予定である．２つ目が「言葉のトレードオフ」の課題である．ゴルフグローブのパッケージデザインを対象として６つの感性ワードを対象としてアンケートを行い，満足化トレードオフ法を利用して感性ワード間のトレードオフ関係を見出した．その結果，「かわいい」という感性ワードは他の５つのものとはトレードオフが存在すること，「かっこいい」「手に取りたい」を調べれば，他の３つのワードは相関性を見出すことができることが判明した．今後，３つの感性ワードに絞ってアンケートを行い，数量化理論I類でもとめた近似の性格性の問題，感性ワードが減ることでの被験者の負担の軽減と正確性が上がるかどうかの課題を明確にしていきたい．３つ目が色選定の課題である．数量化理論III類を用いたのちにK-Means法を用いると感性ワードに隣接する情報した得られないところ，重回帰分析を利用して感性ワードをすべて反映できる方法の提案を行った．今後，検証実験を基にその有効性を確認していく予定である．
  • 言葉によるエンジニアリング
    日本学術振興会：科学研究費助成事業 基盤研究(B)
    Date (from‐to) : 2022/04 -2025/03 
    Author : 荒川 雅生; 平見 尚隆; 勝又 暢久; 竹内 謙善
  • Development of optimal design for 'living' continuous body vibration with phase reduction method
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
    Date (from‐to) : 2018/04 -2022/03 
    Author : Tanaka Hisaaki
     
    Injection-locking of nonlinear oscillators to an external periodic forcing is a fundamental phenomenon which adjusts their frequencies to that of an external forcing. Such injection-locking enables to stabilize the frequency of the oscillator, and it has a long history and produces a large variety of applications. In our research, we develop a method for maximizing the frequency range of an external forcing sustaining the injection-locked mode (i.e., locking range or synchronization band), based on our newely developed theory for self-oscillating MEMS. More precisely, we have enabled a direct simulation of injection-locked MEMS through interacting two reliable softwares of Abaqus and Dymola. Further, inspired by these precise simulations, a shape optimigation theory has been developed for a self-oscillating continuous body including MEMS.

Social Contribution

  • 構造最適化技術の理論と実践
    Date (from-to) : 2022/09/16-2022/09/16
    Role : Lecturer
    Category : Lecture
    Sponser, Organizer, Publisher  : 日本機械学会
    Event, Program, Title : 中国四国支部特別講演会

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