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2003 Fiscal Year Final Research Report Summary

Development of evolutionary structural optimization design under kinematics and control system

Research Project

Project/Area Number 13450091
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Dynamics/Control
Research InstitutionTokyo Institute of Technology

Principal Investigator

OKUMA Masanki  Tokyo Institute of Technology, Mechanical and Aerospace Engineering, Professor, 大学院・理工学研究科, 教授 (60160454)

Co-Investigator(Kenkyū-buntansha) NAKAHARA Takeshi  Tokyo Institute of Technology, Mechanical and Aerospace Engineering, Assistant professor, 大学院・理工学研究科, 助手 (00334516)
TAMURA Shinji  Tokyo Institute of Technology, Information Science and Engineering, Associate professor, 大学院・情報理工学研究科, 助手 (70323798)
KAJIWARA Itsuro  Tokyo Institute of Technology, Mechanical and Aerospace Engineering, Associate professor, 大学院・理工学研究科, 助教授 (60224416)
Project Period (FY) 2001 – 2003
KeywordsStructural Optimization / Structural Dynamics / Structure of dragonfly / Light-weight and Stiffening Design / Precise Finite Element Modelling / Nonlinear Optimization / Vibration Control / Connecting Rod
Research Abstract

The purpose of this research is to develop a new evolutionary structural optimization design methods under kinematics and control system and, in addition, to investigate the structural advanced feature of dragonflies from the viewpoint of structural dynamics. New evolutionary structural optimization methods for static and dynamics have been developed. Then, their advantages and practical usefulness have been investigated using some kinds of basic application studies. This research has published some valuable technical papers and reports and has eventually obtained a ph.D degree to a graduate student of ph.D course who contributed to this research project The dependency problem of initial structures was deeply investigated and was made weak to optimum solutions. This investigation invented the new evolutionary structural optimization. Therefore, the method steadily creates very good results. A cantilever model, a bridge model and a connecting rod in engine etc. were optimally designed by the methods and their good results were obtained. In addition, a health monitoring system is developed as a kind of artificial nerve system for mechanical structural systems. Because the structures to be designed by such evolutionary optimization methods should be implemented such self-monitoring systems. Very precise investigation of dragonfly wings was carried out from the viewpoint of str-uctural dynamics. Vibration testing gave the fundamental natural frequencies and natural modes of the wings. Vein network pattern was accurately measured using a digital microscope and a finite element model of a dragonfly wing was created. The finite element model is available for various computer simulation studies. Finally, the result of this research will be able to create the possibility and usefulness of future development on this sort of research works to the investigators and others

  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] 金 裕永: "三次元構造物の形態自動最適化に関する研究"学位論文(東京工業大学). (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Woo Young Kim, Takeshi Nakahara, Masaaki Okuma: "An Evolutionary Optimization Method for Designing Three-Dimensional Structures"Proceedings of the 5^<th> World Congress on Structural and Multi-disciplinary Optimization. (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Naoto Fuse, Masaaki Okuma, Jin-Young Jeon, Takeshi Nakahara: "A Study on Noise Reduction of Vibrating Plate by its Curvature Optimum Design and Optimum Rib Attachment"The 10^<th> International Conference on Sound and Vibration. (CD-ROM). 3917-3924 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 金 祐永, 中原健志, 大熊政明: "三次元構造物の自動最適化のための生長変形法の開発(第2報 動力学最適化の基本アルゴリズムの開発と基礎検討)"日本計算工学会・論文集 http://save.k.u-tokyo.ac.jp/jsces/. (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 大熊政明, 天野淳之, 中原健志: "3Dデジタイザーと実験データ利用による高精度有限要素モデルの作成法"日本機械学会機械力学計測制御部門講演会D&D2003 CD-ROM講演論文集. (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Woo Young KIM: "Dissertation of ph.D degree"Tokyo Institute of Technology. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Woo Young KIM, Takeshi NAKAHARA, Masaaki Okuma: "An Evolutionary Optimization Method for Designing the Three-Dimensional Structures (The 1st Report : Fundamental Algorithm and Basic Application Study on Statics),"Journal of JSCES. Vol.5, No.20020019. 25-31 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Woo Young KIM, Takeshi NAKAHARA, Masaaki OKUMA: "An Evolutionary Optimization Method for Designing Three-Dimensional Structures, (The 2nd Report : Fundamental Algorithm on Dynamics and Basic Case Study),"Journal of JSCES, http://save.k.u-tokyo.ac.jp/jsces/. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Woo Young Kim, Takeshi Nakahara, Masaaki Okuma: "An Evolutionary Optimization Method for Designing Three-Dimensional Structures,"Proceedings of the 5^<th> World Congress on Structural and Multi-disciplinary Optimization. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Naoto Fuse, Masaaki Okuma, Jin-Young Jeon, Takeshi Nakahara: "A Study on Noise Reduction of Vibrating Plate by its Curvature Optimum Design and Optimum Rib Attachment,"proceedings of The 10^<th> Intenational Conference on Sound and Vibration. (CD-ROM). 3917-3924 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takeshi Nakahara, Masaaki Yamamoto, Yusuke Ohya, Masaaki Yamamoto: "Bolt loosening detection using vibration characteristics of thin plate with piezoelectric elements,"Proceedings of SPIE Vol.5391, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace System. (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Woo Young KIM, Ph.D Dissertation: ""A Study on Evolutionary Optimization Method for Designing Three-Dimensional Structures""Tokyo Institute of Technology. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hisayoshi Matsuoka, Masaaki Okuma: "New method of modal anarysis for cirindrical structure by standing wave separation and application of tire modeling,"Transactions of JSME. 68-375. 3322-3328 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masaaki Okuma: "Experimental Spatial Matrix Identification and a Consideration of the Relationship between the Uniqueness of Solution and the Practical Implementation,"International Conference Proceedings of Experimental and Theoretical Mechanics 2002. 190-197 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Taro Tomatsu, Modak S., Masaaki Okuma, Kundra T.: "Identification and prediction of F-shape structure dynamics by spatial matrix identification method,"proceedings of ISMA2002. (CD-ROM). (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hisayoshi Matsuoka, Masaaki Okuma: "A new experimental modal parameter estimation method for cylindrical structures by standing wave decomposition and application to tire modeling,"proceedings of ISMA2002. (CD-ROM). (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takeshi Nakahara, Masaaki Okuma: "On the Development of Real-Time Structural Health monitoring Methods (1st Report, Measurement of Frequency Response Functions under Steady Operational Condition),"Transactions of JSME. 67-660. 2476-2483 (2001)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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