This paper presents a comparative study of the raking damage to
high speed craft (HSC) and conventional ships. The analysis is
based on a detailed theoretical model for the raking resistance of
an assembled ship bottom structure and on the idea that the impact
conditions for various ship types have certain similarities. Thus,
damage statistics for one ship type can be scaled to another ship
type.The result of a raking damage calculation is sensitive to
various uncertain parameters, such as the impact velocity and the
rock height and shape. Conveniently, the paper shows that the
damage scaling factor is insensitive to these uncertainties.The
result of the analysis suggests that the normalised raking damage
(damage length/ship length) to HSC can be expected to be 3-4 times
longer than that to conventional ships. This implies that a
significant part of HSC grounding accidents will produce tears in
the full ship length.

Number of pages | 19 |
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Publication status | Published - 1998 |
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