Ship-like target design for underwater explosion experiments

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Authors
  1. Smith, M.J.
  2. Lee, J.J.
Corporate Authors
Defence Research and Development Canada, Atlantic Research Centre, Halifax NS (CAN);Defence Research and Development Canada, Suffield Research Centre, Ralston AB (CAN)
Abstract
The design of floating ship-like targets is considered with the objective of reproducing at reduced scale most of the loading and response effects that would occur in a full-scale vessel in a close proximity underwater explosion event. Some candidate designs are produced based on simple parameterized cross sections. Design parameters are then iteratively adjusted so as to satisfy parameter constraints and the overall design objectives, which include alignment between the fundamental natural period and the explosion gas bubble pulsation period. Candidate designs are proposed, and the shock and gas bubble loading and target response in each case are extensively studied using a 3D coupled Eulerian-Lagrangian simulation methodology. The results of these simulations show that the details of the loading and the response among the four models are significantly different despite the similarity of the test configurations. Local deformation and damage are observed in some models, and a global whipping response is observed in other models. Because of the small scale of the configurations selected, buoyancy effects are very small and this may limit the applicability of the configurations to full-scale.

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Keywords
Underwater explosion;close proximity UNDEX;whipping, gas bubble;water jet;hydrocode;coupled Eulerian-Lagrangian
Report Number
DRDC-RDDC-2017-R096 — Scientific Report
Date of publication
01 Sep 2017
Number of Pages
92
DSTKIM No
CA045295
CANDIS No
805694
Format(s):
Electronic Document(PDF)

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