Forensic Seismology and Boundary Element Method Application vis-à-vis ROKS Cheonan Underwater Explosion  

基于边界元和爆震分析韩国天安舰水下爆炸事件(英文)

作　　者：So Gu Kim 

机构地区：[1]Korea Seismological Institute

出　　处：《Journal of Marine Science and Application》2013年第4期422-433,共12页船舶与海洋工程学报（英文版）

摘　　要：On March 26,2010 an underwater explosion(UWE)led to the sinking of the ROKS Cheonan.The official Multinational Civilian-Military Joint Investigation Group(MCMJIG)report concluded that the cause of the underwater explosion was a 250 kg net explosive weight(NEW)detonation at a depth of 6 9 m from a DPRK"CHT-02D"torpedo.Kim and Gitterman(2012a)determined the NEW and seismic magnitude as 136 kg at a depth of approximately 8m and 2.04,respectively using basic hydrodynamics based on theoretical and experimental methods as well as spectral analysis and seismic methods.The purpose of this study was to clarify the cause of the UWE via more detailed methods using bubble dynamics and simulation of propellers as well as forensic seismology.Regarding the observed bubble pulse period of 0.990 s,0.976 s and 1.030 s were found in case of a 136NEW at a detonation depth of 8 m using the boundary element method(BEM)and 3D bubble shape simulations derived for a 136kg NEW detonation at a depth of 8 m approximately 5 m portside from the hull centerline.Here we show through analytical equations,models and 3D bubble shape simulations that the most probable cause of this underwater explosion was a 136 kg NEW detonation at a depth of 8m attributable to a ROK littoral"land control"mine(LCM).

关 键 词：CEPSTRUM SPECTROGRAM BUBBLE pulse TOROIDAL BUBBLE boundary element method ICCP forensic SEISMOLOGY underwater explosion 

分 类 号：U674.701[交通运输工程—船舶及航道工程]