In this paper, the dynamic behavior of square plates with various thicknesses and stiffening configurations subjected to underwater explosion (UNDEX) are evaluated through a relatively novel approach which is called Incremental Explosive Analysis (IEA). The IEA estimates the different limit-states and deterministic assessment of plats’ behavior, considering uncertainty of loading conditions and...

Solution of near-field underwater explosion (UNDEX) problems frequently require the modeling two-way coupled fluid-structure interaction (FSI). This paper describes addition an embedded boundary method to UNDEX framework for multiphase, compressible and inviscid fluid using combined algorithms Runge–Kutta, discontinuous-Galerkin, level-set direct ghost-fluid methods. A computational dynamics (C...

The hulls of naval ships are exposed to forces and moments coming from internal external sources. Usually, these interactions that can be described mathematically by harmonic polyharmonic functions. shock UNDEX type (underwater explosion) works completely differently its time waveform is difficult describe with mathematical functions as pressure vs. time. paper presents a simplification physica...

Three-dimensional finite element analysis (3D-FEA) models have been used to evaluate the shock-resistance responses of various equipments, including armaments mounted on a warship caused by underwater explosion (UNDEX). This paper aims check possibility using one-dimensional (1D) FEA for responses. A frigate was chosen evaluation UNDEX. The divided into thirteen discrete segments along length s...

In naval warfare, underwater explosion (UNDEX) shock waves significantly influence the stability and safety of pressure hull structure equipment. This study investigated unique dynamic buckling a closed cylindrical shell subjected to far-field side-on UNDEX wave using three-dimensional numerical simulation based on acoustic–structural arithmetic. particular, flow-field response characteristics,...

This work presents a Direct Ghost Fluid Method (DGFM) as part of two-fluid numerical framework suitable to model explosive gas and water flows resulting from underwater explosion (UNDEX). Due the presence with shock waves in modeling domain, classic Eulerian methods inherent diffusion may not be effective. Numerical occurs due nonphysical diffused density at material interfaces, which creates s...

Behavior of blast wave in underwater explosion is of interest to metal forming community and ship designers. Underwater detonation is, also a potential hazard to the water intakes or a plant spent fuel pool. In this paper, some techniques for calculating free-field blast parameters such as pressure and impulse in underwater explosion and prediction of bubble pulsation parameters are presented a...

A model of formation, development, and acoustic properties of the bubble cloud resulting from an underwater explosion is presented. The model includes several parts: explosion globe dynamics, initial break-up of the explosion globe, turbulence created by the explosion globe fragmentation, and further break-up of the bubbles by the turbulence. The time history of the bubble cloud properties is c...