Note: Device for underwater laboratory simulation of unconfined blast waves.

Rev Sci Instrum

BTG Research, 9574 Simon Lebleu Road, Lake Charles, Louisiana 70607, USA.

Published: June 2015

AI Article Synopsis

  • Shock tubes are commonly used to simulate blast waves in air, but there is a lack of experimental models for underwater blast waves.
  • An oxy-acetylene underwater blast simulator has been developed, capable of producing peak blast pressures of around 1860 kPa with decent consistency (average standard deviation of 150 kPa).
  • By changing the distance from the blast source, a range of peak pressures (460 kPa to 1860 kPa) can be achieved.

Article Abstract

Shock tubes simulate blast waves to study their effects in air under laboratory conditions; however, few experimental models exist for simulating underwater blast waves that are needed for facilitating experiments in underwater blast transmission, determining injury thresholds in marine animals, validating numerical models, and exploring mitigation strategies for explosive well removals. This method incorporates an oxy-acetylene driven underwater blast simulator which creates peak blast pressures of about 1860 kPa. Shot-to-shot consistency was fair, with an average standard deviation near 150 kPa. Results suggest that peak blast pressures from 460 kPa to 1860 kPa are available by adjusting the distance from the source.

Download full-text PDF

Source
http://dx.doi.org/10.1063/1.4922828DOI Listing

Publication Analysis

Top Keywords

blast waves
12
underwater blast
12
peak blast
8
blast pressures
8
1860 kpa
8
blast
7
note device
4
underwater
4
device underwater
4
underwater laboratory
4

Similar Publications

: This study explores how thoracic orientation affects lung pressure and injury outcomes from shock waves, building on earlier research that suggested human posture impacts injury severity. : A layered finite element model of the chest was constructed based on the Chinese Visual Human Dataset (CVH), including the rib and intercostal muscle layers. The dynamic response of the chest under 12 different angle-oriented shock waves under incident pressures of 200 kPa and 500 kPa was calculated.

View Article and Find Full Text PDF

Stress wave dispersion can result in the loss or distortion of critical high-frequency data during high-strain-rate material tests or blast loading experiments. The purpose of this work is to demonstrate the benefits of correcting stress wave dispersion in split-Hopkinson pressure bar experiments under various testing situations. To do this, an innovative computational algorithm, SHPB_Processing.

View Article and Find Full Text PDF
Article Synopsis
  • Veterans often experience hearing loss due to blast-induced injuries, particularly affecting the organ of Corti (OC) and hair cells in the cochlea, which are hard to measure experimentally.!* -
  • A new 3D finite element model was developed to simulate how blast waves affect the OC, using components like sensory cells and surrounding fluid to more accurately assess potential injury locations.!* -
  • The model showed significant structural strain where hair cells connect, suggesting a higher risk of damage from blasts, and it improved prediction accuracy by including interstitial fluid compared to previous models.!*
View Article and Find Full Text PDF

Temporal changes of neurobehavior in rats following varied blast magnitudes and screening of serum biomarkers in early stage of brain injury.

Sci Rep

December 2024

Xi'an Key Laboratory of Toxicology and Biological Effects, Research Center for Toxicological and Biological Effects, Institute for Hygiene of Ordnance Industry, Xi'an, 710065, China.

Blast neurotrauma has been linked to impairments in higher-order cognitive functions, including memory, attention, and mood. Current literature is limited to a single overpressure exposure or repeated exposures at the same level of overpressure. In this study, a rodent model of primary blast neurotrauma was employed to determine the pressure at which acute and chronic neurological alterations occurred.

View Article and Find Full Text PDF

Mg (Magnesium ion) can affect bone tissue metabolism by regulating related signaling pathways in bone metabolism. However, how to realize precise controlled release of Mg in bone regeneration treatment still presents a challenge. Herein, for the first time, the GelMA-BP (Gelatin Methacryloyl-Bisphosphonate) and the composite nano-bubble system are fused to construct the Mg blasting controlled-release hydrogel microspheres, the stability of the nano-bubbles in the microspheres is enhanced through metal coordination complexation, and the burst of the nano-bubbles is controlled by using ultrasonic cavitation to achieve the precise controlled release of Mg, ultimately effectively promoting bone reconstruction.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!