Abstract
SUMMARY Semi-analytical methods for analysis of plate crushing and ship bow damage in head-on collisions are developed in this paper. Existing experimental and theoretical studies for crushing analysis of plated structures are summarized and compared. Simple formulae for determining the crushing force, force-deformation curve and damage extent of a ship bow, expressed in terms of ship principal particulars, are derived for longitudinally stiffened oil tankers and bulk carriers with length of 150 metres and above. The methods are compared with published results and good agreement is achieved. The approach developed can be used easily to determine the crushing resistance and damage extent of the ship bow when ship length and collision speed are known. The method can be used in probabilistic analysis of damage extents in ship collisions where a large number of calculations are generally required.
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