Experimental investigation of multiple barrier structures subject to contact underwater explosion

• Main Authors: Vitaly V. Chizhevsky, Andrei I. Dulnev
• Format: Article
• Language: English
• Published: Krylov State Research Centre 2018-08-01
• Series: Труды Крыловского государственного научного центра
• Subjects: contact underwater explosion; barrier; filler
• Online Access: http://transactions-ksrc.ru/eng/archive/Experimental-investigation-of-multiple-barrier-structures-subject-to-contact-underwater-explosion/
• ISSN: 2542-2324; 2618-8244

Object and purpose of research. The paper investigates the physical failure patterns in multiple barrier structures caused by a contact underwater explosion and looks at how the ultimate explosion resistance of the total structure and damage of individual barriers depend on the main structural parameters (thickness of barriers, spacing of barriers, etc.) as well as various types of filler materials between barriers. Materials and methods. The studies are based on the model test data obtained for steel multiple-barrier structures. Water or two-phase gas/liquid medium of bubble structure are used as fillers. Main results. Empirical relations are suggested and justified for estimation of deformation parameters for the main barrier as well as the extent of damage to outer plating and dividing barrier. It is shown that by using a two-phase gas/liquid filler in multiple-barrier structures it is possible to significantly reduce damage inflicted on individual barriers as well as to raise the overall level of structure resistance to contact underwater blasts. Conclusion. The results of this study can be useful in design of multiple barrier systems for efficient resistance to underwater explosions, as well as in verification of computational models of contact underwater explosions on hull structures.