Stage 1: Test Cases in Calm Water - Roll decay test
It is proposed to study separately the damaged condition of the ship in calm water,
which is well defined and feasible to be inspected and validated by model
experimental tests, before proceeding to a repeat of a study on the damaged ship’s
stability in waves. This should clarify identified problems in properly predicting some
fundamental properties of the damaged ship, like the employed damping models and
the ship’s natural period.
This part of the benchmark study, which can be completed within the present
committee’s period, should consist of the following (study on at least two ship cases):
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Numerical reproduction of intact ship roll decay test
Numerical reproduction of roll decay test of ship with trapped water inside
specified compartment, variation of the amount of water (and position).
Numerical reproduction of in/egress flow through specified damage opening
(possible: variation of damage opening), comparison with results of captive of
forced motion model tests.
Numerical reproduction of roll decay test of a ship with specified damage
opening.
Preliminary Time Schedule (Stage 1)
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Announcement of intended new benchmark study, December 2003
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Evaluation of participating interest, January 2004
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Specification of benchmark study extent, February 2004
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Preparation of guidelines, March 2004
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Preparation of experimental test data, March 2004
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Announcement of benchmark study, April 2004
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Study results gathering, September 2004
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First analysis and reporting of results, October 2004
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Forum discussion of results, October/November 2004 (STAB Workshop
2004)
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Update study report, December 2004
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Released final report with results and conclusions, January 2005
ITTC – STAB COMMITTEE – DAMAGE STAB. BENCHMARK STUDY 2004