Novel Internal-Deformation Control to Bridge Fidelity Gap in Variable-Wing Aircraft Modeling

• Project/Area Number: 20K21041
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 24:Aerospace engineering, marine and maritime engineering, and related fields
• Research Institution: Tohoku University
• Principal Investigator: MAKIHARA Kanjuro 東北大学, 工学研究科, 教授 (60392817)
• Co-Investigator(Kenkyū-buntansha): 亀山 正樹 信州大学, 学術研究院工学系, 准教授 (30302178) ; 永井 大樹 東北大学, 流体科学研究所, 教授 (70360724) ; 川畑 成之 阿南工業高等専門学校, 創造技術工学科, 准教授 (70390507)
• Project Period (FY): 2020-07-30 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000); Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2020: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
• Keywords: 柔軟展開翼 / 展開翼 / 内部変形制御 / マルチフィデリティ / 可変翼 / 航空機モデリング / モーフィング / 風洞実験

Outline of Research at the Start

「可変翼機のマルチフィデリティ・モデリング法の確立」が目的である．構造モデルに新規アイデア【内部変形制御】を導入することで，表現変数の数を変更せずに，構造モデルの忠実度・詳細度（フィデリティ）を意のままに変えられる新しい構造解析手法の構築を目指す．内部変形を制御する変形拘束方程式をモデル式と連立するという【内部変形制御】の発想を持って，フィデリティの谷を解決する．国際共同研究と大型風洞実験を通して，理論解析と実証実験の両面から，提案手法の有効性を明らかにする．

Outline of Final Research Achievements

We established a structural analysis method that can change the fidelity and detail of the structural model of variable wing aircraft by using the innovative concept “internal deformation control”. We solved “valley of fidelity” with “internal deformation control” of controlling the deformation constraint equation that controls the internal deformation with the model expression. Through international joint research and large wind tunnel experiments, we clarified the effectiveness of the proposed method in both theoretical analysis and demonstration experiments. The significance of challenging research is (1) a research field with few previous studies and poor knowledge, and there is a budding element that challenges based on new ideas, (2) utilize new “internal deformation control”, international cooperation, and large wind tunnel experiments to realize the true multi-fidelity.

Academic Significance and Societal Importance of the Research Achievements

本研究は以下の４つの学術的意義や社会的意義を有する．(1) 知見が乏しい研究分野で新規研究を展開する萌芽的要素を持つ．(2) 新規アイデア【内部変形制御】と国際協力と大型風洞実験をフルに活用して「真のマルチフィデリティ」を実現する挑戦的意義を持つ．(3) 既存概念にとらわれない先進的研究で，当該分野の学術体系を転換する潜在性を持つ．勾配ベクトルを用いる提案手法は，可変翼を始め「関節ジョイントの大回転運動を伴う構造」の計算に適しており，従来の微小変形解析に比べ，大きな研究波及効果を持つ．(4) 将来発展例は，首振り機構を持つ大型洋上風車や災害地探索用羽ばたきドローンなど，多岐に渡る．

Research Products

• [Int'l Joint Research] The University of Manchester/University of Chester/Aston University(英国)
• [Int'l Joint Research] The University of Iowa(米国)
• [Int'l Joint Research] University of Warwick(英国)
• [Journal Article] Recent Advances in the Absolute Nodal Coordinate Formulation: Literature Review From 2012 to 2020 (2022)
  • Author(s): Otsuka Keisuke、Makihara Kanjuro、Sugiyama Hiroyuki
  • Journal Title: Journal of Computational and Nonlinear Dynamics Volume: 17 Issue: 8 Pages: 080803-080803
  • DOI: 10.1115/1.4054113
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Three-Dimensional Aeroelastic Model for Successive Analyses of High-Aspect-Ratio Wings (2021)
  • Author(s): Otsuka Keisuke、Wang Yinan、Makihara Kanjuro
  • Journal Title: Transactions of ASME, Journal of Vibration and Acoustics Volume: 143 Issue: 6 Pages: 061006-061006
  • DOI: 10.1115/1.4050276
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Geometrically nonlinear aeroelastic characteristics of highly flexible wing fabricated by additive manufacturing (2021)
  • Author(s): Tsushima Natsuki、Tamayama Masato、Arizono Hitoshi、Makihara Kanjuro
  • Journal Title: Aerospace Science and Technology Volume: 117 Pages: 106923-106923
  • DOI: 10.1016/j.ast.2021.106923
  • Peer Reviewed
• [Journal Article] Structural and aerodynamic characteristics of additively manufactured flexible wings (2020)
  • Author(s): TSUSHIMA Natsuki、TAMAYAMA Masato、MAKIHARA Kanjuro、ARIZONO Hitoshi
  • Journal Title: Transactions of the JSME (in Japanese) Volume: 86 Issue: 890 Pages: 19-00452-19-00452
  • DOI: 10.1299/transjsme.19-00452
  • NAID: 130007930429
  • ISSN: 2187-9761
  • Peer Reviewed / Open Access
• [Journal Article] Absolute Nodal Coordinate Formulation With Vector-Strain Transformation for High Aspect Ratio Wings (2020)
  • Author(s): Otsuka Keisuke、Wang Yinan、Makihara Kanjuro
  • Journal Title: Journal of Computational and Nonlinear Dynamics Volume: 16 Issue: 1 Pages: 1-10
  • DOI: 10.1115/1.4049028
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Absolute Nodal Coordinate Formulations for Aeroelastic Analysis of Next-Generation Aircraft Wings (2021)
  • Author(s): Otsuka, K., Dong, S., and Makihara, K.
  • Organizer: Proceedings of International Design Engineering Technical Conferences & Computers and Information in Engineering Conference (IDETC/CIE)
  • Int'l Joint Research
• [Presentation] Experimental Investigation of Flutter Power Generation with Piezoelectric Film (2021)
  • Author(s): Imagawa, K., Otsuka, K., Jia, Y., Shi, Y., Soutis, C., Kurita, H., Narita, F., and Makihara, K.
  • Organizer: Proceedings of the 18th International Conference on Flow Dynamics
  • Int'l Joint Research
• [Presentation] New MMC-Based Topology Optimization Method with Curvilinear Representation (2021)
  • Author(s): Hirotani, S., Dong, S., Kuzuno, R., Okada, T., Otsuka, K., and Makihara, K.
  • Organizer: Proceedings of the 18th International Conference on Flow Dynamics
  • Int'l Joint Research
• [Presentation] Nonlinear Aeroelastic Analysis Coupling Unsteady Vortex Lattice Method and Strain-Based Beam Formulation (2021)
  • Author(s): Otsuka, K., Dong, S., Wang, Y., Fujita, K., Nagai, H., and Makihara, K.
  • Organizer: Proceedings of the 18th International Conference on Flow Dynamics
  • Int'l Joint Research
• [Presentation] Strain-Based Geometrically Nonlinear Beam Formulation for Multibody Dynamic Analysis (2021)
  • Author(s): Otsuka, K., Wang, Y., Palacios, R., and Makihara, K.
  • Organizer: Proceedings of AIAA Scitech 2022 Forum
  • Int'l Joint Research
• [Presentation] Development of Multibody Dynamics Formulation Based on Canonical Theory (2021)
  • Author(s): Dong, S., Otsuka, K., Wang, Y., Fujita, K., Nagai, H., and Makihara, K.
  • Organizer: Proceedings of the 33rd International Symposium on Space Technology and Science
  • Int'l Joint Research
• [Presentation] 大変形を伴う板振動に関する研究 (2021)
  • Author(s): 今川慶，大塚啓介，槙原幹十朗
  • Organizer: 日本機械学会東北支部第56期総会講演会
• [Presentation] 歪を要素変数とする非線形梁要素の柔軟マルチボディ解析への拡張 (2021)
  • Author(s): 大塚啓介，Dong Shuonan，槙原幹十朗
  • Organizer: 歪を要素変数とする非線形梁要素の柔軟マルチボディ解析への拡張
• [Presentation] Flexible Wing Fluid-Structure Interaction Model Coupling Unsteady Vortex Lattice Method and Absolute Nodal Coordinate Formulation (2020)
  • Author(s): Otsuka, K., Dong, S., Wang, Y., Fujita, K., Nagai, H., and Makihara, K.
  • Organizer: Proceedings of the 20th International Symposium on Advanced Fluid Information
  • Int'l Joint Research
• [Presentation] Multibody Dynamic Analysis Based on Canonical Theory (2020)
  • Author(s): Dong, S., Otsuka, K., and Makihara, K.
  • Organizer: Proceedings of the 17th International Conference on Flow Dynamics
  • Int'l Joint Research
• [Presentation] Flexible Multibody Dynamics Using Absolute Nodal Coordinate Formulation with Internal Constraint Equation (2020)
  • Author(s): Otsuka, K., Dong, S., Hirotani, S., Kuzuno, R., and Makihara, K.
  • Organizer: Proceedings of the 15th International Conference on Motion and Vibration Control
  • Int'l Joint Research
• [Presentation] Multibody Modeling Using Absolute Nodal Coordinate Plate Element for Deployable Aerospace Structures (2020)
  • Author(s): Otsuka, K., Dong, S., Hirotani, S., Kuzuno, R., and Makihara, K.
  • Organizer: Proceedings of the 15th International Conference on Motion and Vibration Control
  • Int'l Joint Research
• [Presentation] 絶対節点座標法を用いた柔軟翼の非線形構造解析 (2020)
  • Author(s): 大塚啓介，Dong Shuonan，槙原幹十朗
  • Organizer: 第62回構造強度に関する講演会
• [Presentation] 弾性力を簡易化したANCF/CRBF梁モデルの運動解析 (2020)
  • Author(s): 廣谷俊輔，董鑠男，大塚啓介，槙原幹十朗
  • Organizer: 東北支部第56期秋季講演会
• [Remarks] 槙原・大塚 研究室 - 宇宙構造物工学分野
  • URL: http://web.tohoku.ac.jp/makihara/www-j/index-j.htm