Numerical simulations of a tanker collision with a bergy bit incorporating hydrodynamics, a validated ice model and damage to the vessel

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DOIResolve DOI: http://doi.org/10.1016/j.coldregions.2012.04.006
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TypeArticle
Journal titleCold Regions Science and Technology
ISSN0165-232X
Volume81
Pages2635; # of pages: 10
SubjectBergy bit collision; Numerical simulation; Ship damage
AbstractNumerical simulations of a collision between a loaded tanker and a bergy bit have been conducted using LSDyna ™ software. The simulations incorporated hydrodynamics, via LS-Dyna's ALE formulation, and a validated crushable foam ice model. The major portion of the vessel was treated as a rigid body and a section of the hull, located on the starboard side of the forward bow where the ice contact occurred, was modeled as typical ship grillage that could deform and sustain damage as a result of the collision. Strategies for dealing with the highly varying mesh densities needed for the simulations are discussed as well as load and pressure distribution on the grillage throughout the course of the collision. Realistic movement of the bergy bit due to the vessel's bow wave prior to contact with the ice was observed and the damage to the grillage resembled published results from actual grillage damage tests in the lab. A load measurement from the lab tests compared reasonably well with a rough estimate from the simulation. The collision eventually ruptured the hull in a ripping fashion resembling documented incidents of vessel impacts with ice masses.
Publication date
LanguageEnglish
AffiliationOcean, Coastal and River Engineering; National Research Council Canada
Peer reviewedYes
NRC numberOCRE-IR-2012-07
NPARC number21268586
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Record identifiere9293405-f3c2-45b0-92e5-e79adee9233c
Record created2013-10-24
Record modified2016-05-09
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