Results 21 to 30 of about 246,393 (287)

Airblasts Generated by Underwater Explosions [PDF]

open access: yesThe Journal of the Acoustical Society of America, 1964
The pressure-time history of airblasts produced by deep underwater explosions is characterized by a fast-rising peak (P1), a broader second peak (P2), and a subsequent rarefaction phase (P3). P1 is traditionally associated with the least-time propagation path.
Ira Dyer   +2 more
openaire   +1 more source

Modeling on the reflection and focusing process of the underwater explosion shock waves by an ellipsoidal reflector [PDF]

open access: yes, 2018
In the present study, based on the theories of shock wave propagation and nonlinear reflection and focusing, we modelled the reflection and focusing of the underwater explosion shock waves by an ellipsoidal reflector, where the shock wave characteristics
Guo, R., Guo, Rui, Liu, L Lei, Liu, Lei
core   +2 more sources

Numerical simulation of rubber coating circular plates subjected to near-field underwater explosion

open access: yesZhongguo Jianchuan Yanjiu, 2018
[Objectives] To study the coating effects on structures subjected to near-field underwater explosion, [Methods] the coupling Runge-Kutta Discontinuous Galerkin Method, Boundary Element Method and Finite Element Method are developed in this paper to solve
JIN Zeyu   +3 more
doaj   +1 more source

Interaction between Reflected Shock and Bubble in Near-wall Underwater Explosion

open access: yes, 2015
Shock and pulsating bubble, as two processes for structure damage in underwater explosion, are often studied separately due to their different time scales.
李家春, 聂冰川, 张会琴
core   +1 more source

Underwater Image Enhancement Using An Integrated Colour Model. [PDF]

open access: yes, 2007
In underwater situations, clarity of images are degraded by light absorption and scattering. This causes one colour to dominate the image.
Talib, Abdullah Zawawi   +3 more
core   +1 more source

Calculation of explosion bending moment in hull girders subjected to non-contact underwater explosions

open access: yesZhongguo Jianchuan Yanjiu, 2017
Non-contact underwater explosion can generate violent movement on hull girders,which may cause longitudinal strength problems. The explosion bending moment can be calculated using a detailed finite element ship model,but this costs considerable working ...
WU Guangming   +3 more
doaj   +1 more source

On the regimes of underwater explosion for a submerged slender structure by pulsating bubble [PDF]

open access: yes, 2015
Three regimes: near-, middle- and far-fields of underwater explosion are proposed in this study aiming at providing an overview on the responses of submerged slender structure by pulsating bubble.
Li, JC (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.   +3 more
core   +1 more source

The Impact of the Latest 3D Technologies on the Documentation of Underwater Heritage Sites [PDF]

open access: yes, 2013
Documenting underwater cultural heritage is a challenging undertaking. Underwater environment is not a man’s natural habitat and special equipment and devices had to be invented so that he could enter and study this environment.
Kovačič, Rok   +5 more
core   +1 more source

Underwater Channel Characterization to Design Wireless Sensor Network by Bellhop [PDF]

open access: yes, 2016
Acoustic underwater link due to low attenuation is employed for underwater sensor network (UWSN). Due to water changing physical properties and different environmental conditions, the sound propagation for every underwater channel are different.
Bahrami, Nima; Universiti Teknologi Malaysia   +3 more
core   +1 more source

Numerical modeling and simulation of underwater explosions interacting with discrete rigid bodies

open access: yesAIP Advances, 2023
The smoothed particle hydrodynamics (SPH) method is widely used to simulate underwater explosion phenomena. However, previous studies have focused on the interaction between the underwater explosion and continuous structures (e.g., steel plates and dams),
Tao Zhang   +3 more
doaj   +1 more source

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