Articles of The Transactions of KSRC

Effect of close proximity underwater explosion upon elements of hull structures

Full text article ( in russian)

Year	2019
Issue	387
Volume	1
Pages	73–92
Caption	Effect of close proximity underwater explosion upon elements of hull structures
Authors	Dulnev A
Keywords	underwater explosion, hydrostatic pressure, straining, failure, experiment, computer-based simulation
DOI	10.24937/2542-2324-2019-1-387-73–92
Summary	Object and purpose of research.This paper investigates straining and failure specifics of multi-barrier structures and specimens of polymeric composite materials under effect of a close proximity underwater explosion, as well as studies the behavior of stiffened cylindrical shells under joint effect of explosion and hydrostatic pressure. Subject matter and methodsThe studies are based on the test data obtained in Krylov State Research Centre Explosion Chamber, as well as on computer-based simulation of underwater explosion and structural straining. Main results.This study is the first-ever demonstration that second pulsation of bubble has crucial influence upon straining character and parameters of a cylindrical shell with circular stiffeners under joint effect of close underwater explosion and high (5–7 MPa) hydrostatic pressure. It has been established that in terms of fiber tear GRP samples are ~ 2 times more explosion-resistant than CRP ones. It was found how main structural parameters of multi-barrier structures influence their explosion resistance Conclusion.The results of this study must be taken into account in development of structures that efficiently resist close underwater explosion.