Review of the dynamics of the underwater explosion bubble

Many researches show that underwater explosion can cause severe damage on warships.Shock wave in explosion only generates local damage on the warship;while the pulsating pressure and retarded flow resulted from bubble motion can induce total damage,endangering the total longitudinal strength and provoking the rupture in the midship section.Moreover,the jet formed in the bubble collapse phase will produce the local damage of structure.Recently the interaction of bubble and underwater structure was the focus of the international researches.Therefore,starting with the basic phenomenon of underwater explosion bubble,this paper mainly expounds the research development and present state in this field from theoretical analysis,experimental technique and numerical methods,and reviews and discusses the research progress and key techniques of underwater explosion bubble dynamics such as expansion,collapse and jet formation.Finally,some problems needing further settlement are put forward on the basis of former researches in order to offer consult for craft brothers.