Simulation of the Guirguis cylinder experiment using coupled Chinook/LS-DYNA

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Authors
  1. Gannon, L.
Corporate Authors
Defence Research and Development Canada, Atlantic Research Centre, Halifax NS (CAN)
Abstract
A methodology for simulating the response of structures to the shockwave produced by close-proximity underwater explosions (UNDEX) is demonstrated using the Chinook hydrocode coupled with the LS-DYNA explicit dynamics finite element (FE) code. The simulation reproduces an experiment wherein a 2.8 g charge of pentaerythritol tetranitrate (PETN) is detonated inside a water-filled aluminum cylinder. The secondary loading resulting from reflection of the shockwave off of the gas bubble as a rarefaction wave is reproduced along with consequent reloading of the structure due cavitation closure in the fluid. The simulation results are in good agreement with experimental measurements of structural deformation and pressure at the inner wall of the cylinder. The predicted peak radial deformation of the cylinder wall at the mid-height is within 5.5% of the measured value.

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Keywords
Underwater explosion;finite element analysis;Chinook;validation
Report Number
DRDC-RDDC-2017-R002 — Scientific Report
Date of publication
01 Jan 2017
Number of Pages
40
DSTKIM No
CA044520
CANDIS No
805053
Format(s):
Electronic Document(PDF)

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