Simulating the blast wave from detonation of a charge using a balloon of compressed air

Blanc, Ludovic; Herrera, S. Santana; Hanus, Jean‐Luc

doi:10.1007/s00193-017-0774-0

Cited by 13 publications

(11 citation statements)

References 28 publications

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“…We model air as a viscous fluid; this is not dictated solely by physical, but also by practical reasons, namely to avoid to avoid numerical, spurious oscillations in the rise in pressure over the blast wave. For a more detailed description of the fluid-structure interaction phenomena and their modelling, we refer to [21,22,23,20]. Further details can also be found in [6].…”

Section: Empirical Modelsmentioning

confidence: 99%

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Resistance of museum artefacts against blast loading

Masi

Stefanou

Vannucci³

et al. 2020

Journal of Cultural Heritage

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The response of museum artefacts and statues subjected to deliberate explosions of moderate intensity is investigated and their vulnerability assessed. The study focuses on the most predominant failure mechanisms, namely overturning and fracture due to the tensile stresses developed by the impact of shock waves. The rocking response is investigated relying on the existing knowledge and theory of inverted pendulum structures subjected to earthquake loadings. An analytical, established approach for determining the overturning domain, developed in a previous study, is used to investigate the critical stand-off distance between the target and the explosive in order to avoid toppling. The proposed analytical model is adopted by defining appropriate correction parameters to consider the real geometry of the museum objects. We assess the overturning domain of some emblematic statues of high aesthetic and cultural value, and namely:

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Section: Empirical Modelsmentioning

confidence: 99%

“…[22]): the balloon analogue models the explosive source and air is assumed as an ideal gas. The material parameters for the constitutive laws of the balloon are those detailed in [21] (p. 645, model #6). To ensure mesh convergence, the elements size of the Eulerian domain is fixed to 1.0 cm.…”

Section: Fluid-structure Interaction Effectmentioning

confidence: 99%

Resistance of museum artefacts against blast loading

Masi

Stefanou

Vannucci³

et al. 2020

Journal of Cultural Heritage

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“…Through numerical simulations, detonation, propagation of shock waves and their interaction with deformable structures can be efficiently modelled with a Coupled Eulerian-Langrangian (CEL) scheme. For more, see [23,16,24].…”

Section: Numerical Physics-based Modelsmentioning

confidence: 99%

“…[23]): the balloon analogue models the explosive source and air is assumed as an ideal gas. The material parameters for the constitutive laws of the balloon are those detailed in [16] (p. 645, model #6). To ensure mesh convergence, the elements size of the Eulerian domain is fixed to 1.0 cm.…”

Section: Fluid-structure Interaction Effectmentioning

confidence: 99%

Rocking Response and Overturning of Museum Artefacts Due to Blast Loading

Masi¹,

Stefanou²,

Vannucci³

et al. 2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…More specifically, the predictions of our analytical model are compared to detailed numerical analyses that consider the above mentioned phenomena, a combined sliding/rocking behaviour, and the possibility of uplifting (flight mode). The numerical analyses are three-dimensional, they benefit from the well-established balloon analogue [18] for modelling the explosive source and they are based on a Coupled Eulerian-Langrangian (CEL) scheme for modelling the propagation of shock waves and their interaction with the rocking block. It is worth emphasizing that a complete 3D fluid-structure interaction of shock waves with all sides of the block is considered in order to assess the validity of our modelling assumptions and simplifications.…”

Section: Introductionmentioning

confidence: 99%

Rocking response of inverted pendulum structures under blast loading

Masi

Stefanou

Vannucci³

et al. 2019

International Journal of Mechanical Sciences

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We investigate the dynamics of inverted pendulum structures under fast-dynamic excitations arising from an explosion. We model blast actions using established empirical models and best-fit interpolations of existing experimental tests. We focus attention on pure rocking response mechanisms. We present moment balance equations and overturning conditions. Inspired by previous works in the frame of earthquake engineering, we derive new analytical, closed-form solutions for the rocking response and the overturning domain of slender blocks due to explosions. The analytical findings and assumptions are validated through existing experimental tests and detailed three-dimensional numerical simulations, which consider the full interaction between the blast waves and the structure. We show that unilateral rocking response and overturning are predominant mechanisms compared to sliding and uplifting. Finally, we develop design charts to be used as a straightforward decision making tool for determining the critical stand-off distance between the explosive source and the target in order to prevent overturning. Our model can be easily applied for the design of protective devices to preserve artefacts, secure buildings and humans, as well as for devising energy absorbing systems based on rocking.

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Simulating the blast wave from detonation of a charge using a balloon of compressed air

Cited by 13 publications

References 28 publications

Resistance of museum artefacts against blast loading

Resistance of museum artefacts against blast loading

Rocking Response and Overturning of Museum Artefacts Due to Blast Loading

Rocking response of inverted pendulum structures under blast loading

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