Large Deformation Fluid-Structure Interaction and Interface Tracking for Chinook


  1. Alexander, D.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);MARTEC Ltd, Halifax NS (CAN)
The ability to assess the loading, response and survivability of naval structures and equipment to withstand the effects of underwater weapons containing non-ideal explosives is of fundamental importance; particularly for determining the threat damage potential of new weapon technologies, and developing effective counter-measures. Further advancement of the Martec Limited’s Chinook computational fluid dynamics software is detailed, with more advanced methods for material interface tracking and structural large deformation capability for fluid structure interaction (FSI). The local mesh adaptation technique modifies the CFD mesh in the cells adjacent to the structure, such that the cell faces correspond to the location of the structure, allowing for precise determination of pressure loads and interface velocities. Details of the numerical implementation and theory are provided. A series of validation cases were performed in order to verify the FSI and material interface tracking functionality and validate the results. The large deformation capability, initially detailed here, can be applied for any FSI interaction, such as applications in underwater explosions, particle break-up, aerodynamic ablation, and structural failure. The large deformation capability allows for assessment of failure properties and the behaviour of structures under high-rate impulse loading.

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Report Number
DRDC-ATLANTIC-CR-2011-343 — Contractor Report
Date of publication
01 Feb 2012
Number of Pages
Electronic Document(PDF)

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