Reduction of global effects on vehicles after IED detonations

Denefeld, V.; Heider, N.; Holzwarth, A.; Sättler, Axel; Salk, M.

doi:10.1016/j.dt.2014.05.005

Cited by 16 publications

(6 citation statements)

References 3 publications

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“…(7) Recently, Heider and co-workers (Heider and Klomfass, 2005;Heider et al, 2013;Denefeld et al, 2014) investigated dynamic loading experienced by vehicles and vehicle occupants due to the detonation of nearby IEDs. This was done by systematically employing a combination of scaled experiments and numerical simulations.…”

mentioning

confidence: 99%

Design optimization of a mine-blast-venting solution for protection of light-tactical-vehicle subjected to shallow-buried underbody mine detonation

Grujičić

Yavari

Snipes

et al. 2016

Multidiscipline Modeling in Materials and Structures

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Purpose – The purpose of this paper is computer-aided engineering analysis of the recently proposed side-vent-channel concept for mitigation of the blast-loads resulting from a shallow-buried mine detonated underneath a light tactical vehicle. The concept involves the use of side-vent-channels attached to the V-shaped vehicle underbody, and was motivated by the concepts and principles of operation of the so-called “pulse detonation” rocket engines. By proper shaping of the V-hull and side-vent-channels, venting of supersonically expanding gaseous detonation products is promoted in order to generate a downward thrust on the targeted vehicle. Design/methodology/approach – The utility and the blast-mitigation capacity of this concept were examined in the prior work using computational methods and tools which suffered from some deficiencies related to the proper representation of the mine, soil, and vehicle materials, as well as air/gaseous detonation products. In the present work, an attempt is made to remove some of these deficiencies, and to carry out a bi-objective engineering-optimization analysis of the V-hull and side-vent-channel shape and size for maximum reduction of the momentum transferred to and the maximum acceleration acquired by the targeted vehicle. Findings – Due to the conflicting nature of the two objectives, a set of the Pareto designs was identified, which provide the optimal levels of the trade-off between the two objectives. Originality/value – To the authors’ knowledge, the present work is the first public-domain report of the side-vent-channel blast-mitigation concept.

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mentioning

confidence: 99%

Design optimization of a mine-blast-venting solution for protection of light-tactical-vehicle subjected to shallow-buried underbody mine detonation

Grujičić

Yavari

Snipes

et al. 2016

Multidiscipline Modeling in Materials and Structures

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show abstract

“…e arbitrary Lagrangian-Eulerian (ALE) algorithm implemented in the LS-DYNA environment, a widely used tool for blast modelling [13,18,21,23], was chosen to provide the numerical solution to the problem. e problem equations could then be rewritten in a more suitable form, where the convective and advective terms were explicitly presented, as well as taking into account the plain formulation:…”

Section: Numerical Model Descriptionmentioning

confidence: 99%

“…erefore, deflectors using the shape effect are used to mitigate blast effects, with the v-shaped hull ("V") being the most typical. Quantitative evaluation of a "V" deflector, in comparison with a flat panel, has been the subject of many papers [13][14][15]. e action of the protector aims to preserve a vehicle's trajectory and has been undisputedly shown to reduce injury to occupants.…”

Section: Introductionmentioning

confidence: 99%

On the Blast Mitigation Ability of Multiple V-Shape Deflectors

Stanisławek

Morka

2020

Shock and Vibration

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This paper presents a 2D numerical study of v-shape deflectors subjected to high explosive charge detonation. The literature provides many papers concerning the appropriate geometry of blast protection deflectors. Such structures require a relatively high distance between the ground and the vehicle chassis. In most cases, the placement of a deflector is not possible or it cannot cover the whole area under a chassis. An interesting question that arises is to what extent a set of small deflectors would be able to mitigate blast effects. The content of this paper constitutes an answer to this question. Three analyses were conducted: (1) multiplication of triangle components, (2) effect of deflector size, and (3) geometry-induced shock dynamics. The problem was solved with the use of modelling and simulation methods, in particular, CFD-FEM implemented in the LS-DYNA code. It was considered a plain issue in computational fluid dynamics, where space discretization for each option was built with two-dimensional elements to ensure efficient calculations. Deflectors were described using a rigid wall boundary condition, and an adequate simplified detonation model was assumed. The primary measure of the results was reaction force history, with momentum transfer and pressure distribution maps considered supplementary. The studies performed showed that both minimizing the v-shape deflector size and surrounding it with adjacent structures had a negative impact on its blast mitigation effectiveness. However, for each multi-v-shape deflector, some improvement was present, and, therefore, in situations where the installation of a typical protector is not possible due to dimensional requirements, it may offer a compromise solution.

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“…They found that numerical models cannot instutite appropriate forces compared to the experimental tests with the physical ATD. Denefeld et al [11] carried out several blast tests with different ground clearances and vehicle geometries. They validated numerical simulation parameters for the investigation of IED effects on vehicles and crew members.…”

Section: Sakarya University Journal Of Science 23(3) 382-389 2019mentioning

confidence: 99%

Investigation of dynamic response of a mannequin in a vehicle exposed to land mine blast

Erdik¹

2019

Sakarya University Journal of Science

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Explosive devices are serious threats for armored vehicles and occupants. Following detonation of a high explosive, blast loads, which are transferred through shock waves to the vehicle hull, might potentially cause severe injuries on the body parts. Anthropomorphic test devices (ATDs) allow for injury assessment of occupants in armored vehicles subjected to land mine explosion in accordance with injury criteria standards. This study examines the emerging role of numerical simulations in the context of survivability of combat vehicles in modern warfare. The objective of this paper is to contribute to the understanding of numerical simulation for dynamic response of human dummies seated in armored vehicles subjected to land mine by comparing the performance of Hybrid-III 50th percentile ATD in numerical simulation with that of full-scale blast testing. Therefore, force and acceleration data were collected from critical body parts; tibia, pelvis, lumber spine, upper neck, and head of the mannequin in blast testing. Those data were compared with numerical simulation results. The numerical simulations were performed in LS-DYNA using CONWEP blast loading method. It was found that the numerical simulation results are in accord with those obtained from blast testing.

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Reduction of global effects on vehicles after IED detonations

Cited by 16 publications

References 3 publications

Design optimization of a mine-blast-venting solution for protection of light-tactical-vehicle subjected to shallow-buried underbody mine detonation

Design optimization of a mine-blast-venting solution for protection of light-tactical-vehicle subjected to shallow-buried underbody mine detonation

On the Blast Mitigation Ability of Multiple V-Shape Deflectors

Investigation of dynamic response of a mannequin in a vehicle exposed to land mine blast

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