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Atunuation effect of underwater explosion by porous media

Research Project

Project/Area Number 25420134
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Fluid engineering
Research InstitutionAichi Institute of Technology

Principal Investigator

Kazutaka Kitagawa  愛知工業大学, 工学部, 教授 (50278230)

Co-Investigator(Kenkyū-buntansha) OHTANI Kiyonobu  東北大学, 流体科学研究所, 助教 (80536748)
Research Collaborator ABE Atsushi  伊藤忠テクノソリューションズ
NAGAHIRO Daiki  愛知工業大学, 大学院, 博士前期課程
NOMURA Tatsuya  愛知工業大学, 大学院, 博士前期課程
Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords水中爆発の減衰 / 爆発環境緩和技術 / 水中爆発の軽減 / 水中衝撃波 / 衝撃波
Outline of Final Research Achievements

Collision of underwater explosion and any shape body is one of the research topics related to attenuate the shock environment in any structures for disaster prevention from from strong explosion hazards. This study is the attenuation and reduction effect of underwater explosion, bubble pulsation and bubble jet flow near the complex boundaries. A gas bubble is producing by the explosive. It is expanding the ellipsoid shape by effect of moving boundary of foam. At contraction phase, a gas bubble is moving to downward and bubble jet flow is generating apart from a foam surface by weak downward flow.Time histories of total stress (sum of contact stress of foam skeleton, gas pressure and hydraulic pressure) in foam is demonstrated a stress which is smaller than that due to the rigid wall. Total stress in foam attenuated up to 99 % of peak dynamic pressure in rigid wall.
Attenuation of underwater explosion could attenuate and mitigate by using porous compressible foam.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (17 results)

All 2016 2015 2014 2013 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (14 results) (of which Int'l Joint Research: 1 results) Remarks (1 results)

  • [Journal Article] Attenuation of underwater explosion propagating through porous compressible foam2015

    • Author(s)
      Kitagawa K, Nomura T, Ohtani K, Abe A
    • Journal Title

      Science and Technology of Energetic Materials

      Volume: 76-6 Pages: 127-132

    • NAID

      40020737025

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Micro-explosive-induced underwater shock wave propagation and reflection at the interface2015

    • Author(s)
      Ohtani K, Ogawa T
    • Journal Title

      Science and Technology of Energetic Materials

      Volume: 76-6 Pages: 139-143

    • NAID

      40020737038

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 水中爆発と各種形状の可変空隙媒体との衝突干渉2016

    • Author(s)
      長廣大樹,大谷清伸,北川一敬
    • Organizer
      平成27年度衝撃波シンポジウム
    • Place of Presentation
      熊本大学
    • Year and Date
      2016-03-07
    • Related Report
      2015 Annual Research Report
  • [Presentation] Attenuation and reduction effect of underwater explosion by porous materials2015

    • Author(s)
      Kitagawa K,Nagahiro D,Ohtani K,Konishi Y, Abe A
    • Organizer
      Fifteenth International Symposium on Advanced Flow Information
    • Place of Presentation
      Sendai International Center Sendai
    • Year and Date
      2015-10-27
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 時系列PIV を用いた水中爆発周辺流れ場の可視化2015

    • Author(s)
      北川一敬,大谷清伸,長廣大樹
    • Organizer
      可視化情報 学会全国講演会
    • Place of Presentation
      京都工芸繊維大学 松ヶ崎キャンパス
    • Year and Date
      2015-10-10
    • Related Report
      2015 Annual Research Report
  • [Presentation] 水中爆発周辺流れ場のPIV 計測2015

    • Author(s)
      長廣大樹,北川一敬,大谷清伸
    • Organizer
      火薬学会2015 年度春季研究発表会
    • Place of Presentation
      慶應義塾大学日吉キャンパス
    • Year and Date
      2015-05-28
    • Related Report
      2015 Annual Research Report
  • [Presentation] 水中爆発と凹凸形状の可変形空隙媒体との衝突干渉2015

    • Author(s)
      長廣大樹,野村達也,,北川一敬,大谷清伸,阿部淳
    • Organizer
      平成26年度衝撃波シンポジウム
    • Place of Presentation
      伊香保,群馬,日本
    • Year and Date
      2015-03-09 – 2015-03-11
    • Related Report
      2014 Research-status Report
  • [Presentation] PIVによる水中爆発周りの流れ場の可視化2015

    • Author(s)
      北川一敬,野村達也,長廣大樹,大谷清伸
    • Organizer
      平成26年度衝撃波シンポジウム
    • Place of Presentation
      伊香保,群馬,日本
    • Year and Date
      2015-03-09 – 2015-03-11
    • Related Report
      2014 Research-status Report
  • [Presentation] Attenuation of underwater explosion propagating through porous compressible foam2014

    • Author(s)
      K. KITAGAWA, T. NOMURA, K. OHTANI, A. ABE
    • Organizer
      The 5th International Symposium on Energetic Materials and their Applications
    • Place of Presentation
      福岡,日本
    • Year and Date
      2014-11-12 – 2014-11-14
    • Related Report
      2014 Research-status Report
  • [Presentation] Attenuation and reduction effect of underwater explosion by porous materials(2nd report)2014

    • Author(s)
      K. KITAGAWA, K. OHTANI, A. ABE
    • Organizer
      Fourteenth International Symposium on Advanced Fluid Information
    • Place of Presentation
      仙台,日本
    • Year and Date
      2014-10-08 – 2014-10-10
    • Related Report
      2014 Research-status Report
  • [Presentation] 水中爆発と凹凸形状物体の衝突干渉2014

    • Author(s)
      野村達也,北川一敬,大谷清伸,阿部淳
    • Organizer
      平成25年度衝撃波シンポジウム
    • Place of Presentation
      相模原,日本
    • Related Report
      2013 Research-status Report
  • [Presentation] Interaction between underwater explosion and porous foam layer2013

    • Author(s)
      K. Kitagawa, A. Abe and K. Ohtani
    • Organizer
      29th International Symposium on Shock waves (ISSW29)
    • Place of Presentation
      Wisconsin, USA
    • Related Report
      2013 Research-status Report
  • [Presentation] The Behavior of Micro Explosive Charge Underwater Explosion near the Rigid Wall2013

    • Author(s)
      K. Kitagawa and A. Abe
    • Organizer
      Seventh International Symposium on Scale Modeling (ISSM-7)
    • Place of Presentation
      Hirosaki, JAPAN
    • Related Report
      2013 Research-status Report
  • [Presentation] Attenuation and Reduction Effect of Underwater Explosion by Porous Materials2013

    • Author(s)
      K. Kitagawa and K. Ohtani
    • Organizer
      Thirteenth International Symposium on Advanced Fluid Information
    • Place of Presentation
      Sendai, JAPAN
    • Related Report
      2013 Research-status Report
  • [Presentation] 剛壁面下方における水中爆発およびバブル挙動の数値解析2013

    • Author(s)
      阿部淳,北川一敬,石黒文博
    • Organizer
      火薬学会2013年度春季研究発表会
    • Place of Presentation
      横浜,日本
    • Related Report
      2013 Research-status Report
  • [Presentation] 水中爆発時の生成ガスと凹凸形状物体の衝突干渉の可視化2013

    • Author(s)
      野村達也,北川一敬,大谷清伸
    • Organizer
      高速度イメージングとフォトニクスに関する総合シンポジウム 2013 (JCHSIP2013)
    • Place of Presentation
      室蘭,日本
    • Related Report
      2013 Research-status Report
  • [Remarks] 非一様複雑構造媒体による衝撃波・爆風環境の減衰効果

    • URL

      http://aitech.ac.jp/~kitagawa/

    • Related Report
      2013 Research-status Report

URL: 

Published: 2014-07-25   Modified: 2019-07-29  

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