Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Water Wave Propagation Caused by Underwater Blasting in a 3D Numerical Wave Tank

3차원 수치파동수조에서 수중발파에 의한 수면파의 전파해석

  • Lee, Woo-Dong (Department of Ocean Civil Engineering, Institute of Marine Industry, Gyeongsang National University) ;
  • Jeong, Yeon-Myeong (Institute of Marine Industry, Gyeongsang National University) ;
  • Choi, Kyu-Nam (Daewoo Engineering & Construction Co., Ltd.) ;
  • Hur, Dong-Soo (Department of Ocean Civil Engineering, Institute of Marine Industry, Gyeongsang National University)
  • 이우동 (국립경상대학교 해양산업연구소 해양토목공학과) ;
  • 정연명 (국립경상대학교 해양산업연구소) ;
  • 최규남 ((주)대우건설) ;
  • 허동수 (국립경상대학교 해양산업연구소 해양토목공학과)
  • Received : 2019.01.09
  • Accepted : 2019.08.12
  • Published : 2019.08.31
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Abstract

When underwater blasting is conducted, both shock waves and water waves have an effect on adjacent coastal areas. In this study, an empirical formula for estimating the details of water waves caused by underwater blasting was applied to a non-reflected wave generation system, and a 3D numerical wave tank (NWT) was improved to reproduce the generation and propagation of such water waves. The maximum elevations of the propagated water waves were comparatively analyzed to determine the validity and effectiveness of the NWT. Good agreement was demonstrated between the empirical and simulation results. The generation and propagation of water waves were also simulated under each underwater blasting scenario for the removal of the Todo islet at the Busan Newport International Terminal (PNIT). It was determined that the water waves generated by the underwater blasting scenario examined in this study did not have a significant impact on the PNIT. In addition, multiple-charge blasting caused higher wave heights than single-charge blasting. As the amount of firing charge increased, the wave height also increased. Finally, larger water waves were generated during the later blasting conducted at a deeper depth as compared with an earlier blasting conducted at a relatively shallow depth.

Keywords

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