Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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A Study on the Characteristics of Underwater Explosion for the Development of a Non-Explosive Test System

무폭약 시험 장치 개발을 위한 수중폭발 특성에 대한 연구

  • Lee, Hansol (Department of Naval Architecture & Ocean Engineering, Chungnam National University) ;
  • Park, Kyudong (Department of Naval Architecture & Ocean Engineering, Chungnam National University) ;
  • Na, Yangsub (Security Convergence Research Institute, KAIST) ;
  • Lee, Seunggyu (Department of Mechanical Engineering, KAIST) ;
  • Pack, Kyunghoon (Marine System Technology Institute, Agency for Defense Development) ;
  • Chung, Hyun (Department of Naval Architecture & Ocean Engineering, Chungnam National University)
  • 이한솔 (충남대학교 선박해양공학과) ;
  • 박규동 (충남대학교 선박해양공학과) ;
  • 나양섭 (카이스트 안보융합연구원) ;
  • 이승규 (카이스트 기계공학과) ;
  • 박경훈 (국방과학연구소 해양기술연구원) ;
  • 정현 (충남대학교 선박해양공학과)
  • Received : 2020.06.12
  • Accepted : 2020.08.13
  • Published : 2020.12.20
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Abstract

This study deals with underwater explosion (UNDEX) characteristics of various non-explosive underwater shock sources for the development of non-explosive underwater shock testing devices. UNDEX can neutralize ships' structure and the equipment onboard causing serious damage to combat and survivability. The shock proof performance of naval ships has been for a long time studied through simulations, but full-scale Live Fire Test and Evaluation (LFT&E) using real explosives have been limited due to the high risk and cost. For this reason, many researches have been tried to develop full scale ship shock tests without using actual explosives. In this study, experiments were conducted to find the characteristics of the underwater shock waves from actual explosive and non-explosive shock sources such as the airbag inflators and Vaporizing Foil Actuator (VFA). In order to derive the empirical equation for the maximum pressure value of the underwater shock wave generated by the non-explosive impact source, repeated experiments were conducted according to the number and distance. In addition, a Shock Response Spectrum (SRS) technique, which is a frequency-based function, was used to compare the response of floating bodies generated by underwater shock waves from each explosion source. In order to compare the magnitude of the underwater shock waves generated by each explosion source, Keel Shock Factor (KSF), which is a measure for estimating the amount of shock experienced by a naval ship from an underwater explosionan, was used.

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References

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