A 1D–3D mixed method for the numerical simulation of blast waves in confined geometries

Benselama, Adel M.; William-Louis, Mame; Monnoyer, F.

doi:10.1016/j.jcp.2009.06.010

Cited by 24 publications

(29 citation statements)

References 19 publications

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“…By fitted data in Table 1, k f = 3.1 is determined and from Figure 6 is the results of   R f from numerical simulation and Eqn (12). Figure 7 shows the comparison of the typical time T r , T d and T f between numerical simulation and the present model and they agree well at a long range of scaled distance.…”

Section: R(m)mentioning

confidence: 59%

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Studying an engineering model on an air blast wave

Wang¹,

Gong²,

Xiong³

et al. 2014

WIT Transactions on the Built Environment

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This paper presents a new engineering model on the air blast wave of TNT explosive. The model is built and the parameters are calibrated based on numerical simulated pressure time data of shock wave in air. The model describes the peak overpressure, impulse, typical time and attenuation coefficient of the shock wave with new computational equations. Comparison of pressure configuration for the scaled distance shows that the present engineering model can give consistent results with the numerical code and experiments.

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Section: R(m)mentioning

confidence: 59%

“…Figure 2B is relative error of fitted data for overpressure and it shows the maximum error is about 7%. Figure 3 is the comparison of the peak overpressure between the present model and the previous engineering equations [2][3][4][5][6][7] and some experiments in literature [11,12].…”

Section: R(m)mentioning

confidence: 99%

Studying an engineering model on an air blast wave

Wang¹,

Gong²,

Xiong³

et al. 2014

WIT Transactions on the Built Environment

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“…First is a period of spherical pressure wave propagation and its interaction with the structure in the near-field. After a distance of 4∼6 times' radii from the explosive centre, it evolves into second phase; that is, after complicated interactions in first phase the blast wave propagates along tunnel axis like a 1-dimensional plane wave [22,23]. Therefore, the loading on the tunnel from inner explosion is quite complicated.…”

Section: The Description Of Blast Loads Due To a Centric Point-sourcementioning

confidence: 99%

Vibration of a Cylindrical Tunnel under a Centric Point-Source Explosion

Zhao

Chen

Vafeidis

et al. 2017

Shock and Vibration

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Underground tunnels are vulnerable to terrorists' bombing attacks, which calls for studies on tunnel's response to internal explosive loading. In this paper, the dynamic response of a cylindrical tunnel to an ideal centric point explosion was treated as an axisymmetric 2-dimensional problem, in which the tunnel was modeled with a continuous anisotropic shell, while the ground medium's effect was accounted for with linear elastic Winkler springs and the explosive loading described by a temporal and spatial function. The governing equation of the motion is a fourth-order partial differential equation, for which a numerical method combining finite difference with the implicit Newmark-method was adopted. This method avoided complicated integral transform and numerical inverse transformation, thus allowing efficient parameter study. The maximum radial displacement was found on the cricle of the center of explosive, where hoop stress is the maximum principal stress. The anisotropy showed little influence on maximum hoop stress. Within the range of ground medium's modulus, minor influence on maximum hoop stress was incurred. This research may be helpful to hazard assessment and protective design for some critical subway tunnels.

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“…One cube wall was joined to a tube of 16.8 cm in diameter and 128 cm in length, which was in turn connected to another tube at some distance (see Fig. 3b) [19]. A TNT explosive charge with mass of 18.5 g was detonated at the joint of the cube with the tube.…”

Section: Ipicse-2016mentioning

confidence: 99%

Blast load estimation using Finite Volume Method and linear heat transfer

Lidner

Szcześniak

2016

MATEC Web Conf.

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Abstract. From the point of view of people and building security one of the main destroying factor is the blast load. Rational estimating of its results should be preceded with knowledge of complex wave field distribution in time and space. As a result one can estimate the blast load distribution in time. In considered conditions, the values of blast load are estimating using the empirical functions of overpressure distribution in time (Δp(t)). The Δp(t) functions are monotonic and are the approximation of reality. The distributions of these functions are often linearized due to simplifying of estimating the blast reaction of elements. The article presents a method of numerical analysis of the phenomenon of the air shock wave propagation. The main scope of this paper is getting the ability to make more realistic the Δp(t) functions. An explicit own solution using Finite Volume Method was used. This method considers changes in energy due to heat transfer with conservation of linear heat transfer. For validation, the results of numerical analysis were compared with the literature reports. Values of impulse, pressure, and its duration were studied.

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A 1D–3D mixed method for the numerical simulation of blast waves in confined geometries

Cited by 24 publications

References 19 publications

Studying an engineering model on an air blast wave

Studying an engineering model on an air blast wave

Vibration of a Cylindrical Tunnel under a Centric Point-Source Explosion

Blast load estimation using Finite Volume Method and linear heat transfer

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