The dynamics of three-dimensional underwater explosion bubble

Zhang, A-Man; Yao, Xiongliang; Yu, Xiaoyong

doi:10.1016/j.jsv.2007.10.007

Cited by 49 publications

(18 citation statements)

References 14 publications

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“…Many researchers have performed underwater explosion simulations to study bubble pulsation. [5][6][7][8] Most underwater explosion simulations base on forward problem, and detonation product EOS parameters are of importance and necessity in the forward simulations. [9][10][11][12] Standard method of characteristics is a classical calculation method and has clear physical significance.…”

Section: Introductionmentioning

confidence: 99%

A modified method of characteristics and its application in forward and inversion simulations of underwater explosion

Zhang

Chao

2016

AIP Advances

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This paper introduces a modified method of characteristics and its application in forward and inversion simulations of underwater explosion. Compared with standard method of characteristics which is appropriate to homoentripic flow problem, the modified method can be also used to deal with isentropic flow problem such as underwater explosion. Underwater explosion of spherical TNT and composition B explosives are simulated by using the modified method, respectively. Peak pressures and flow field pressures are obtained, and they are coincident with those from empirical formulas. The comparison demonstrates the modified is feasible and reliable in underwater explosion simulation. Based on the modified method, inverse difference schemes and inverse method are introduced. Combined with the modified, the inverse schemes can be used to deal with gas-water interface inversion of underwater explosion. Inversion simulations of underwater explosion of the explosives are performed in water, and equation of state (EOS) of detonation product is not needed. The peak pressures from the forward simulations are provided as boundary conditions in the inversion simulations. Inversion interfaces are obtained and they are mainly in good agreement with those from the forward simulations in near field. The comparison indicates the inverse method and the inverse difference schemes are reliable and reasonable in interface inversion simulation.

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Section: Introductionmentioning

confidence: 99%

A modified method of characteristics and its application in forward and inversion simulations of underwater explosion

Zhang

Chao

2016

AIP Advances

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“…Global response of a surface ship was analyzed by estimating the bubble loading by Vernon's method and simplifying the structure as a BernoullieEuler beam as well as finite element method [12e14]. Also, BEM was used to estimate bubble loading in the structural global response studies [5,6]. All those works primarily focused on the deformation of a specific structure with less universality.…”

Section: Introductionmentioning

confidence: 99%

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

Nie

Zhang

2015

Marine Structures

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a b s t r a c tThree 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. In the near-field, the material starts to yield, thus leading to structure breakdown immediately; remarkable structural global elastic deformation occurs in the middle-field as well as substantial movement; and a structure moves as a rigid body with negligible deformation for the far-field. Equivalent dimensionless parameters are obtained by two different dimensional analysis methods, among which a dominant similarity parameter is found out. Thus, a scaling law providing us with a relation between structural global response and the dominant similarity parameter is yielded, which can be used for demarcating the three regimes quantitatively. To demonstrate, three models corresponding to typical submarine parameters are performed in the case studies. Quantitative criterion of the three regimes is presented along with the regime diagrams. The structural global response features such as the deformation and maximal acceleration/speed of different regimes are provided as well.

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“…The scaled explosion parameters normalized by enables the result of a small scale explosion to convert and to predict into large-scale one. [5] In experimentally investigate this problem, underwater explosion were conducted by detonating micro-explosive, which provide to the performance of attenuation and protection to the dynamic process. The aim of the present research is to investigate the attenuation effect of underwater explosion by porous elastic material.…”

Section: Introductionmentioning

confidence: 99%