The dynamic process of an underwater explosion (UNDEX) bubble in the vicinity deformable structures is a complex phenomenon that has been studied by many researchers. UNDEX transient problem results highly distorted and large deformation structure. previous work introduced various solutions for studying interaction between nearby widely solved combination boundary element method (BEM) finite (F...

structural health monitoring of cracked structures is one of beloved subject of researchers recently. consider of crack behavior in the water and energy pipeline is important because of environmental problems. in this paper consider of crack parameters in the underwater pipe subjected to mechanical transient load is investigated. for this purpose, three- dimensional parametric model of cracked ...

the current manuscript presents the validation of smoothed particle hydrodynamics (sph) techniques for wave generation by underwater explosion, utilizing the so-called dualsphysics numerical model. this numerical method is used to analyze generated waves which are initiated by man-made or natural explosions below free surface level of sea. in spite of the modeling limitations (e.g. absence of o...

This work describes the development of a hybrid framework Runge–Kutta (RK), discontinuous Galerkin (DG), level set (LS) and direct ghost fluid (DGFM) methods for simulation near-field early-time underwater explosions (UNDEX) in early-stage ship design. UNDEX problems provide series challenging issues to be solved. The multi-dimensional, multi-phase, compressible inviscid fluid-governing equatio...

Current Navy implementation of statutory requirements for naval surface combatants dictates the performance of a ship shock trial in order to determine the vulnerability of a ship to an underwater explosion (UNDEX) non-contact shock threat environment. The shock trial features a series of shots, typically three to four, at increasing levels of severity culminating in a two-thirds ship design le...

Abstract An experimental and computational investigation was conducted to study the interaction between bubbles generated by an underwater explosive (UNDEX) a nearby steel plate structure. The experiments were performed for different standoff distances investigate gas bubble rigid High-speed photography utilized capture bubble’s behavior, series of pressure transducers used record emitted histo...