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Development of evacuation area map for unexploded bomb safety disposal processing based on computational mechanics perspective

Research Project

Project/Area Number 16K01305
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Social systems engineering/Safety system
Research InstitutionOkinawa National College of Technology

Principal Investigator

HIGA Yoshikazu  沖縄工業高等専門学校, 機械システム工学科, 教授 (20335368)

Co-Investigator(Kenkyū-buntansha) 井山 裕文  熊本高等専門学校, 機械知能システム工学科, 教授 (40300660)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords不発弾処理 / 数値シミュレーション / ジャーガル / 島尻マージ / 土壌動特性 / 避難マップ / ライナープレート / 可視化 / 土壌特性 / 衝撃波 / 解析・評価 / 国土整備
Outline of Final Research Achievements

For the purpose of contributing to the safety processing technology of unexploded bombs from the computational mechanics perspective, we have investigated in detail by numerical simulation about the effect of the different explosive amounts, bombing shapes and dynamic characteristics of soils on the fragment behaviors. From a series of computational simulation, we have clarified as follows: (1) Dynamic characteristics of Okinawa's unique soil "Shimajiri Maaji" were clarified. (2) It was revealed that about 30 to 50% of fragments associated with soil surface explosion can be suppressed by reducing exit diameter of the liner plate application to 2/3. (3) It was shown that it is possible to reduce positively the radius of evacuation area by controlling the liner plate application. (4) It was shown that it is possible to create an evacuation map by introducing the estimated reachable distance of the fragments into the geographic information system.

Academic Significance and Societal Importance of the Research Achievements

計算力学的視点に立脚した理論的根拠に基づく避難区域の設定ならびに避難区域の積極的な縮小化を目指した処理壕の設計を可能とすることで,区域内の活動を制限することで生ずる経済活動の停止とこれにともなう損失を最小限に抑えることが可能となる.
また,金属・土壌動特性を律速する固体力学分野へ爆発的な燃焼を記述する熱力学+反応場が複層的かつ複雑に絡まる問題を対象としたマルチフィジックス現象を取り扱うため,学術的意義は極めて大きい.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (19 results)

All 2019 2018 2017 2016

All Journal Article (7 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 7 results,  Open Access: 4 results,  Acknowledgement Compliant: 1 results) Presentation (12 results) (of which Int'l Joint Research: 8 results,  Invited: 3 results)

  • [Journal Article] 計算力学的視点による不発弾の安全化処理-地中・地表面爆発問題の数値シミュレーション-2019

    • Author(s)
      比嘉 吉一,井山裕文
    • Journal Title

      設計工学

      Volume: Vol.54, No.2 Pages: 91-97

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Numerical Simulation of Electrical Discharge Characteristics Induced by Underwater Wire Explosion2018

    • Author(s)
      Ryo HENZAN, Yoshikazu HIGA, Osamu HIGA, Ken SHIMOJIMA and Shigeru ITOH
    • Journal Title

      Materials Science Forum

      Volume: Vol. 910 Pages: 72-77

    • DOI

      10.4028/www.scientific.net/msf.910.72

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Numerical Simulation for Soil Surface Explosion Problem, - A study of fragments controlling effect using liner plate application -2018

    • Author(s)
      Yoshikazu HIGA, Hirofumi IYAMA, Ken SHIMOJIMA, Osamu HIGA and Shigeru ITOH
    • Journal Title

      2018 Third International Conference on Engineering Science and Innovative Technology (ESIT)

      Volume: 1 Pages: 1-4

    • DOI

      10.1109/esit.2018.8665029

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Experimental Study and Computational Simulation for Shock Characteristics Estimation of Okinawa's Soils "Jahgaru"2017

    • Author(s)
      Yoshikazu HIGA, Hirofumi IYAMA, Ken SHIMOJIMA, Masatoshi NISHI and Shigeru ITOH
    • Journal Title

      The International Journal of Multiphysics

      Volume: 11(3) Issue: 3 Pages: 245-253

    • DOI

      10.21152/1750-9548.11.3.245

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Numerical Simulation of Explosive Forming Using Detonating Fuse2017

    • Author(s)
      Hirofumi IYAMA, Yoshikazu HIGA, Masatoshi NISHI and Shigeru ITOH
    • Journal Title

      The International Journal of Multiphysics

      Volume: 11(3) Issue: 3 Pages: 233-244

    • DOI

      10.21152/1750-9548.11.3.233

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Numerical Simulation of Electrical Discharge Characteristics Induced by Underwater Wire Explosion2017

    • Author(s)
      Ryo HENZAN, Yoshikazu HIGA, Osamu HIGA, Ken SHIMOJIMA and Shigeru ITOH
    • Journal Title

      Materials Science Forum

      Volume: 印刷中

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Optical Examination of Shockwave Propagation Induced by an Underwater Wire Explosion2016

    • Author(s)
      Osamu HIGA, Atsushi YASUDA, Yoshikazu HIGA, Ken SHIMOJIMA, Kazuyuki HOKAMOTO and Shigeru ITOH
    • Journal Title

      The International Journal of Multiphysics

      Volume: 10(4) Pages: 343-353

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Numerical Simulation of Shock Wave Propagation for Shock Parameter Calculation2019

    • Author(s)
      Hirofumi IYAMA, Yoshikazu HIGA, Masatoshi NISHI and Shigeru ITOH
    • Organizer
      International Symposium on Explosion, Shock wave and High-energy reaction Phenomena 2019 (ESHP2019)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental Observation for Dynamic Characteristics of "Shimajiri Maaji" and its Evaluation using Computational Simulation2019

    • Author(s)
      Yoshikazu HIGA, Shotaro UEHARA, Hirofumi IYAMA, Ken SHIMOJIMA, Osamu HIGA and Shigeru ITOH
    • Organizer
      International Symposium on Explosion, Shock wave and High-energy reaction Phenomena 2019 (ESHP2019)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 沖縄県固有土壌の動特性評価と土中爆発問題の数値シミュレーション2018

    • Author(s)
      上原 彰太郎,比嘉 吉一,井山 裕文
    • Organizer
      日本機械学会第31回計算力学講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Computational simulation for contribute to unexploded bomb disposal problem using SPH scheme2018

    • Author(s)
      Yoshikazu HIGA, Hirofumi IYAMA, Ken SHIMOJIMA and Osamu HIGA
    • Organizer
      The International Conference on Engineering and Applied Sciences
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Computational Prediction of Electrical Discharge Characteristics and Shockwave Propagation Behavior induced by Underwater Wire Explosion2018

    • Author(s)
      Ryo HENZAN, Yoshikazu HIGA, Ken SHIMOJIMA, Osamu HIGA and Shigeru ITOH
    • Organizer
      Yellow Sea Rim Workshop on Explosion, Combusion and other Energetic Phenomena for Various Environmental Issues
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] SPH simulation of Fragment Behavior Prediction for Soil Surface Explosion2018

    • Author(s)
      Yoshikazu HIGA, Ken SHIMOJIMA, Hirofumi IYAMA, Osamu HIGA and Shigeru ITOH
    • Organizer
      Yellow Sea Rim Workshop on Explosion, Combusion and other Energetic Phenomena for Various Environmental Issues
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 島尻マージの動特性評価と数値シミュレーション2017

    • Author(s)
      上原 彰太郎,比嘉 吉一,井山 裕文
    • Organizer
      日本機械学会 九州学生会 第48回学生員卒業研究発表講演会
    • Place of Presentation
      西原町,沖縄
    • Year and Date
      2017-03-03
    • Related Report
      2016 Research-status Report
  • [Presentation] Numerical Simulation for Soil Surface Explosion Problem by SPH method2017

    • Author(s)
      Yoshikazu HIGA, Hirofumi IYAMA, Ken SHIMOJIMA, Osamu HIGA and Shigeru ITOH
    • Organizer
      MULTIPHYSICS 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 島尻マージの実験による動特性評価と数値シミュレーション2017

    • Author(s)
      比嘉 吉一,上原 彰太郎,井山 裕文,比嘉 修,下嶋 賢
    • Organizer
      日本材料学会 第12回 材料の衝撃問題シンポジウム
    • Related Report
      2017 Research-status Report
  • [Presentation] Experimental Study and Computational Simulation for Shock Characteristics Estimation of Okinawa's Soils "Jahgaru"2016

    • Author(s)
      Yoshikazu HIGA, Hirofumi IYAMA, Ken SHIMOJIMA, Masatoshi NISHI and Shigeru ITOH
    • Organizer
      International Symposium on Explosion, Shock wave and High-energy reaction Phenomena 2016 (ESHP2016)
    • Place of Presentation
      Beijing, China
    • Year and Date
      2016-09-26
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Numerical Simulation of Explosive Forming Using Detonating Fuse2016

    • Author(s)
      Hirofumi IYAMA, Yoshikazu HIGA, Masatoshi NISHI and Shigeru ITOH
    • Organizer
      International Symposium on Explosion, Shock wave and High-energy reaction Phenomena 2016 (ESHP2016)
    • Place of Presentation
      Beijing, China
    • Year and Date
      2016-09-26
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Computational Prediction of Underwater Shock Wave Propagation and Reflection Behavior at the Interface for Various Acoustic Impedance Materials2016

    • Author(s)
      Yoshikazu HIGA, Hirofumi IYAMA, Ken SHIMOJIMA and Shigeru ITOH
    • Organizer
      Yellow Sea Rim Workshop on Explosion, Combusion and other Energetic Phenomena for Various Environmental Issues (YSR2016)
    • Place of Presentation
      Kumamoto, Japan
    • Year and Date
      2016-07-01
    • Related Report
      2016 Research-status Report
    • Invited

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Published: 2016-04-21   Modified: 2020-03-30  

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