A New Shock Tube Facility for Tunnel Safety

Colombo, M.; Prisco, Marco di; Martinelli, Paolo

doi:10.1007/s11340-010-9430-7

Cited by 27 publications

(18 citation statements)

References 20 publications

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“…The purpose of the SSTF is to produce a loading similar to that from blast events within controlled laboratory environments. Shock tubes are widely used to study structures exposed to blast loading (see Andreotti et al, 2015; Colombo et al, 2011; LeBlanc et al, 2007; Subramaniam et al, 2009); however, such studies often report the pressure–time histories without fully addressing the requirements to blast performance. According to relevant European (NS-EN 13123-1, 2001; NS-EN13124-1, 2001) and International (ISO 16934, 2007) standards, a shock tube used in blast applications should ensure the consistent reproduction of a plane shock wave normal to the surface of the test object.…”

Section: Experimental Validationmentioning

confidence: 99%

“…Experimental validation is ideal since it represents the actual physics of the problem, and controlled small-scale experiments could therefore be used to validate the current computational methods and improve the understanding of the structural response during blast events. An alternative to explosive detonations is the shock tube technique (see Andreotti et al, 2015; Aune et al, 2015; Colombo et al, 2011; LeBlanc et al, 2007; Lloyd et al, 2010). This is a well-known experimental technique within the field of gas dynamics using well-defined and easily controllable initial conditions providing good repeatability of each test.…”

Section: Introductionmentioning

confidence: 99%

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A shock tube facility to generate blast loading on structures

Aune

Fagerholt

Langseth

et al. 2016

International Journal of Protective Structures

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This study evaluates the performance of a new shock tube facility used to produce blast loading in controlled laboratory environments. The facility was found to generate a planar shock wave over the tube cross section by measuring the pressure distribution on a massive steel plate located at the end of the tube. The properties of the shock wave proved to be a function of driver length and driver pressure, and the positive phase of the measured pressure-time histories was similar to those generated from actual far-field explosive detonations. However, the shock tube is also suited to investigate fluid-structure interaction effects and the behaviour of materials in blast events. This was demonstrated using a three-dimensional digital image correlation technique to measure the deformation field of thin steel plates. Synchronization of the threedimensional digital image correlation and pressure measurements enabled a thorough investigation of the entire experiment and identification of fluid-structure interaction effects. Finally, one-dimensional numerical simulations were performed to investigate the wave patterns during the experiments.

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Section: Experimental Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A shock tube facility to generate blast loading on structures

Aune

Fagerholt

Langseth

et al. 2016

International Journal of Protective Structures

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“…Low pressure gas is also called as a driven gas which is referred toward the shock wave. Driver gas is also known as high pressure gas (Colombo et al, 2011;Dey et al, 2020). Shock tubes can also be used as a tool to direct the blast waves and to know about the exploitation materials and about the flying debris.…”

Section: Introductionmentioning

confidence: 99%

Development of cost-effective shock tube based on experimental and numerical analysis

Ramesh

Kengaiah²,

Gutema

et al. 2021

AEAT

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Purpose The purpose of the study is to design economical shock tube. It is an instrument used for experimental investigations not only related to shock phenomena but also for the behavior of the material when it is subjected to high-speed flow. The material used here in this shock tube is stainless steel ss304 and aluminum. A shock tube consists of two sections, namely, the driver and the driven. The gas in the driven and driver is filled with atmospheric air and nitrogen, respectively, under the predominant condition. Design/methodology/approach The focus of the study is on the design and fabrication of shock tubes. a shock tube is a research tool to make an aerodynamic test in the presence of high pressure and temperature by generating moving normal shock waves under controlled conditions. Findings The main necessity for instrumentation in the shock tube experiment is to know the velocity of the moving shock wave from which the other parameters can be calculated. the pressure transducers are located in the shock tube in various locations to measure aerodynamic parameters in terms of pressure. Originality/value The main objective of this project work is to make an experimental setup to produce supersonic velocity with the readily available material in the market in a highly safe manner.

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“…Conventional blast simulators often employ a constant cylindrical driver with a sudden and abrupt expansion section leading up to the test section (Alay et al, 2018;Chandra et al, 2012;Dallriva et al, 2016;Lloyd et al, 2009;Stolz et al, 2016). In other cases, expanding circular drivers are connected directly and abruptly to a straight test section (Ritzel, 2007) or simply in a constant cross-section for the entire length of the blast simulator (Aune et al, 2016;Colombo et al, 2010). These configurations often lead to various problems in the generated flow as illustrated in Figure 1 as well as being unable to develop the distinct negative phase of a free-field explosion.…”

Section: Introductionmentioning

confidence: 99%

Approximating a far-field blast environment in an advanced blast simulator for explosion resistance testing

Gan

Remennikov

Ritzel³

et al. 2020

International Journal of Protective Structures

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While the current state of blast-resistant design methods is based largely on empirical observations of actual explosive testing or numerical simulations, experimental testing remains the ultimate method for validating blast protection technologies. Field trials for performing systematic experimental studies are exceedingly expensive and inefficient. Conventional blast simulators (shock tubes) enable blast testing to be performed in a safe and controlled laboratory environment but are significantly deficient. The Australian National Facility of Physical Blast Simulation based on the ‘Advanced Blast Simulator’ concept was established to address the shortcomings of conventional blast simulators (shock tubes). The blast simulator at the National Facility of Physical Blast Simulation is a state-of-the-art design having a test section of 1.5 × 2.0 m with dual-mode driver able of operating with either compressed gas or gaseous detonation modes. The simulator is capable of a range of blast-test configurations such as full-reflection wall targets and diffraction model targets. This article aims to demonstrate the ability of the Advanced Blast Simulator in accurately generating a far-field blast environment suitable for high-precision and repeatable explosion testing of various building components. Blast pressure-time histories generated with the Advanced Blast Simulator are validated against equivalent TNT free-field curves reproduced with Conventional Weapons Effects Program. Numerical models based on Computational Fluid Dynamics were developed in ANSYS FLUENT to accurately characterise and visualise the internal flow environment of the National Facility of Physical Blast Simulation Advanced Blast Simulator. The Computational Fluid Dynamics model was also used to explain experimental observations and to determine density and dynamic pressure information for comparisons with free-field explosion conditions.

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A New Shock Tube Facility for Tunnel Safety

Cited by 27 publications

References 20 publications

A shock tube facility to generate blast loading on structures

A shock tube facility to generate blast loading on structures

Development of cost-effective shock tube based on experimental and numerical analysis

Approximating a far-field blast environment in an advanced blast simulator for explosion resistance testing

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