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<p>Accurate estimation of blast loads on structures is essential for reliable structural response and damage prediction. This paper introduces a novel approach to this challenge, studying the interaction between a localized blast wave and a cylindrical column. The blast wave is generated using an explosive-driven shock tube (EDST) positioned in front of the mid-span of a cylindrical column. The background-oriented schlieren technique is used to visualize the diffraction pattern of the blast wave around the column, and piezoelectric pressure gauges measure the loading distribution on its circumference. The experimental data indicate a reduction in reflected pressure of 51% and 93% at angular positions of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(40^\circ \)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mn>40</mn> <mo>∘</mo> </msup> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(90^\circ \)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mn>90</mn> <mo>∘</mo> </msup> </math></EquationSource> </InlineEquation> with respect to the front face of the column. Compared to the reflected pressure on a flat rigid plate under identical loading conditions, a reduction of 12% is found. Two different approaches are adopted in LS-DYNA to simulate the blast wave generation and progression within the EDST and around the column. The numerical results show a good agreement with the measured data and allow the selection of the most efficient finite element approach regarding CPU time.</p>

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Blast loading of cylindrical columns using a small-scale explosive-driven shock tube

  • 期刊论文

  • 发表日期：

    2025年10月13日

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  • B. R. Mohamed,
  • M. Azer,
  • A. Aldjabar,
  • B. Bachir,
  • T. Tine,
  • L. David

摘要

Accurate estimation of blast loads on structures is essential for reliable structural response and damage prediction. This paper introduces a novel approach to this challenge, studying the interaction between a localized blast wave and a cylindrical column. The blast wave is generated using an explosive-driven shock tube (EDST) positioned in front of the mid-span of a cylindrical column. The background-oriented schlieren technique is used to visualize the diffraction pattern of the blast wave around the column, and piezoelectric pressure gauges measure the loading distribution on its circumference. The experimental data indicate a reduction in reflected pressure of 51% and 93% at angular positions of \(40^\circ \) 40 ∘ and \(90^\circ \) 90 ∘ with respect to the front face of the column. Compared to the reflected pressure on a flat rigid plate under identical loading conditions, a reduction of 12% is found. Two different approaches are adopted in LS-DYNA to simulate the blast wave generation and progression within the EDST and around the column. The numerical results show a good agreement with the measured data and allow the selection of the most efficient finite element approach regarding CPU time.