Blast wave mitigation from a straight tube using glass beads

• Homae Tomotaka

  Department of Maritime Technology, National Institute of Technology, Toyama College

• Shimura Kei

  Faculty of Science and Engineering, Keio University

• Sugiyama Yuta

  Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST)

• Wakabayashi Kunihiko

  Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST)

• Matsumura Tomoharu

  Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST)

• Nakayama Yoshio

  Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST)

抄録

Mitigation of a blast wave from a straight tube using glass beads was evaluated to examine blast-wave mitigation by glass beads on a tube floor. Glass beads of 0.6 mm or 3.0 mm diameter were installed on the floor of a square, 330-mm-long straight tube with cross-sectional area of 30 × 30 mm². Arrangement of the glass beads on the tube floor was varied in four ways. The glass bead layer thickness was 5.0 mm, so that the glass beads did not contact with the test explosive. One end of the tube was closed. A specially designed small detonator that contained 100 mg lead azide was ignited near the closed end of the tube as the test explosive. The dependence of mitigative effect on the glass bead diameter and the arrangement was evaluated by measuring the blast pressures outside the tube. The glass beads mitigated the blast wave. The “without glass beads equivalency” analysis revealed that small-diameter glass beads absorbed more energy than large-diameter beads did. The absorbed energy was approximately 40 % of the explosion energy. Results of this study also revealed that the glass beads, which were not near the explosive, are more important for blast mitigation than a water layer on the tube floor.

収録刊行物

• Science and Technology of Energetic Materials

  Science and Technology of Energetic Materials 81 (6), 164-170, 2020

  一般社団法人 火薬学会

キーワード

• buffer arrangement
• blast wave
• glass beads,
• blast mitigation
• particle size

詳細情報

• CRID: 1391975831239009536
• NII論文ID: 130007975418
• DOI: 10.34571/stem.81.6_164
• ISSN: 24346322
• ISSN: 03685977
• ISSN: 13479466
• 本文言語コード: en
• データソース種別:
  • JaLC
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可