Interaction of underwater explosion bubble with complex elastic-plastic structure

张阿漫,; 姚熊亮,

doi:10.1007/s10483-008-0111-z

Cited by 13 publications

(8 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4). The acoustic-wave amplitudes in horizontal components (N-S component) are stronger than those in the vertical component, which is consistent with the splitting direction of the ship as shown in the toroidal bubble deformation 11 of high-resolution spectra in Fig. 5.…”

Section: Introductionsupporting

confidence: 86%

“…Love waves strongly appear on the N-S (tangential) component in the time domain because the ship headed for 327º with 6.7 knots when it was split into two parts in the direction of the NS and Love waves are detected on the tangential component. The rst bubble pulse (BP) appears on the vertical component (HHZ) showing the rarefaction motion (downward collapse) whereas bubble jets (BJ) are present on the horizontal components (N-S and E-W) due to the vortex motion 11 in the time-domain and frequencydomain, but the initial toroidal bubble deformation (a large peak TB) and last toroidal bubble deformation (a small peak TB) on the N-S component (HHN) on the high-resolution spectra due to the splitting direction in the north-south direction. The maxima amplitudes on the spectra start with the rst toroidal bubble deformation (TB) 8-9,11 and are followed by a bubble jet (Fig.…”

Section: Spectral Analysesmentioning

confidence: 99%

See 1 more Smart Citation

Forensic seismologiy for an underwater explosion vis- à-vis the ROKS Cheonan Sinking

Kim¹

2022

Preprint

View full text Add to dashboard Cite

For a very shallow underwater explosion, spectral analysis is preferable to cepstral analysis to find characteristics of a bubble pulse and reverberation effects. Time-domain analyses show bubble pulses and bubble jets as well as positive polarities of the first P-wave arrivals on the vertical component, and spectral analyses also clearly reveal the bubble pulse and reverberation effects. The ROKS Cheonan sinking was a shallow underwater explosion that occurred near the surface showing a bubble jet characteristic resulting in splitting the ship into two pieces including a bubble pulse. The findings of a bubble jet and a toroidal bubble deformation including a bubble pulse are highlighted in this study. The ROKS Cheonan sinking took place off the Baengnyeong Island in the Yellow Sea of the Korean Peninsula at a depth of about 8 m in the sea depth of 44 m on March 26, 2010. The explosive charge weight was estimated at 136 kg TNT using the seismological analyses and boundary element method. The 136 kg TNT is equivalent to one of the abandoned land control mines (LCM) that were deployed near the Northern Limited Lines (NLL) in the Yellow Sea by the South Korean Navy in the late 1970s.

show abstract

Section: Introductionsupporting

confidence: 86%

Section: Spectral Analysesmentioning

confidence: 99%

Forensic seismologiy for an underwater explosion vis- à-vis the ROKS Cheonan Sinking

Kim¹

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Our longer term goal is to develop a coupled BEM‐FEM approach for the complete fluid‐structure interaction (FSI) problem, a natural approach when the surrounding medium can, as here, be considered as unbounded. FEM‐BEM coupling is for instance used in soil‐structure interaction 16,51 or in FSI, see References 52‐54 on the effect of underwater explosions on shells. In the present

𝒵

‐BEM framework that forces time‐domain solutions to be computed at once over the whole time interval of interest, developing a convergent iterative algorithm that alternates time‐domain BEM (fluid) solutions and FEM (structure) solutions remains a significant issue which we are currently investigating.…”

Section: Discussionmentioning

confidence: 99%

A fast boundary element method using the Z‐transform and high‐frequency approximations for large‐scale three‐dimensional transient wave problems

Mavaleix-Marchessoux

Bonnet

Chaillat

et al. 2020

Numerical Meth Engineering

View full text Add to dashboard Cite

Three-dimensional (3D) rapid transient acoustic problems are difficult to solve numerically when dealing with large geometries, because numerical methods based on geometry discretization (mesh), such as the boundary element method (BEM) or the finite element method (FEM), often require to solve a linear system (from the spacial discretization) for each time step. We propose a numerical method to efficiently deal with 3D rapid transient acoustic problems set in large exterior domains. Using the -transform and the convolution quadrature method, we first present a straightforward way to reframe the problem to the solving of a large amount (the number of time steps, M) of frequency-domain BEMs. Then, taking advantage of a well-designed high-frequency approximation, we drastically reduce the number of frequency-domain BEMs to be solved, with little loss of accuracy. The complexity of the resulting numerical procedure turns out to be O(1) in regard to the time discretization and O(N log N) for the spacial discretization, the latter being prescribed by the complexity of the used fast BEM solver. Examples of applications are proposed to illustrate the efficiency of the procedure in the case of fluid-structure interaction: the radiation of an acoustic wave into a fluid by a deformable structure with prescribed velocity and the scattering of an abrupt wave by simple and realistic geometries.

show abstract

“…The influence rule is studied by changing the distance parameter r f systematically in this section. For the influence of other parameters, refer to [17] and [18].…”

Section: Influence Of Characteristic Parameters On Bubble Breakupmentioning

confidence: 99%

Numerical simulation of bubble breakup phenomena in a narrow flow field

Zhang

Song

et al. 2010

Appl. Math. Mech.-Engl. Ed.

Self Cite

View full text Add to dashboard Cite

Based on the boundary integral method, a 3D bubble breakup model in a narrow flow field is established, and a corresponding computation program is developed to simulate the symmetrical and asymmetrical bubble breakup. The calculated results are compared with the experimental results and agree with them very well, indicating that the numerical model is valid. Based on the basic behavior of bubbles in a narrow flow field, the symmetrical and asymmetrical bubble breakup is studied systematically using the developed program. A feasibility rule of 3D bubble breakup is presented. The dynamics of sub-bubbles after splitting is studied. The influences of characteristic parameters on bubble breakup and sub-bubble dynamics are analyzed.

show abstract

Interaction of underwater explosion bubble with complex elastic-plastic structure

Cited by 13 publications

References 21 publications

Forensic seismologiy for an underwater explosion vis- à-vis the ROKS Cheonan Sinking

Forensic seismologiy for an underwater explosion vis- à-vis the ROKS Cheonan Sinking

A fast boundary element method using the Z‐transform and high‐frequency approximations for large‐scale three‐dimensional transient wave problems

Numerical simulation of bubble breakup phenomena in a narrow flow field

Contact Info

Product

Resources

About