Numerical simulation of effect of explosive action on overpasses

doi:10.14256/jce.1943.2016

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…Various numerical codes have been developed to simulate the penetration process, with the aim to accurately represent the physical aspects of penetration whilst minimizing computational time (Kemmoukhe et al, 2019). Computer programs that are used for numerical simulation of explosive action are known as hydrocode programs and are specialized for simulations in fluid dynamics (Draganić and Varevac, 2017). The most used commercial hydrocodes for shaped charge modelling are most likely AUTODYN and LS-DYNA.…”

Section: Numerical Simulationmentioning

confidence: 99%

The efficiency of a small sized hand-made shaped charge

Bohanek

Dobrilović

Tumara

et al. 2022

MGPB

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Shaped charges are widely used in many different fields. The two main users of shaped charges are the military, where shaped charges are used as a weapon against armoured targets, and the oil industry, to perforate wells. Very often, shaped charges are the subject of scientific research focused on optimising shaped charge parameters and increasing the efficiency of shaped charges. Considering a significant number of parameters affecting the penetration depth, the optimization of shaped charge parameters is a complex process. This paper describes research on the efficiency of small handmade shaped charges. In this research, two methods are used, the first one involves simulations with numerical software and the second one is site testing. AUTODYN software was used for the numerical simulations. One of the simulations was focused on the shape and velocity of the shaped charge jet and the second on the penetration of the jet into the target material. On-site efficiency of shaped charges at different standoff distances was tested. The experimental result was compared with the AUTODYN simulation result for hand-made shaped charges placed at a distance of 90 mm from the target material. The results of the simulations agree very well with the results of the site tests. Some advantages and disadvantages of each approach are also observed.

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Section: Numerical Simulationmentioning

confidence: 99%

The efficiency of a small sized hand-made shaped charge

Bohanek

Dobrilović

Tumara

et al. 2022

MGPB

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An Overview of Methods for Blast Load Testing and Devices for Pressure Measurement

Draganić

Varevac

Lukić

2018

Advances in Civil Engineering

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A brief review of experimental methods for testing blast effects on structures is presented. Methods are classified in four groups: field tests, shock tubes, pendulum systems, and new techniques (blast simulator). Description of each method is given together with overall specification of possible instruments used in each test. In today’s modern era of computers which are becoming powerful tool implemented in all aspects of life and also scientific research, comparison of experimental and numerical techniques is also given. Comparison of data obtained from different experimental methods show that careful planning and execution leads to reliable results in terms of pressure, impulse, stress, and damage quantification.

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Statistical Analysis of Blast Wave Decay Coefficient and Maximum Pressure Based on Experimental Results

Lukić

Draganić

Gazić

et al. 2020

WIT Transactions on the Built Environment

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Various expressions have been given in the literature for calculating blast wave parameters. Without experimental testing, it is difficult to determine which expression will predict the actual measurements more realistically. In this paper, a statistical analysis of two blast wave parameters, maximum overpressure and pressure-time diagram decay coefficient, was conducted based on field tests of the cylindrical TNT charge free-air detonation. Simple numerical simulation was also performed in order to compare the obtained maximum overpressures with the field test measurements. A comparison of the maximum free-field overpressures provided insights on the influence of the air mesh size as this proved to be a critical parameter. Statistically obtained blast wave decay coefficient and the maximum overpressure was compared with the analytical expressions given by different authors to determine the most appropriate description of experimental tests. Expressions are given depending on the scaled distance, i.e. the ratio of standoff distance to measuring sensors and cubic root of the charge mass. Expressions for blast wave parameters are used for a quick approximation of blast load for further analysis of structural elements, so their accurate determination ensures more realistic blast analysis and safer design.

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Numerical simulation of effect of explosive action on overpasses

Cited by 3 publications

References 18 publications

The efficiency of a small sized hand-made shaped charge

The efficiency of a small sized hand-made shaped charge

An Overview of Methods for Blast Load Testing and Devices for Pressure Measurement

Statistical Analysis of Blast Wave Decay Coefficient and Maximum Pressure Based on Experimental Results

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