Reduction in ultimate strength capacity of corroded ships involved in collision accidents
Artikel i vetenskaplig tidskrift, 2018

Many studies in the literature present advanced numerical simulations of the assessment of the crashworthiness of marine structures. Most of these studies have not considered the effect of corrosion as an impairment of the struck structure’s resistance to the collision load and the consequence on the ship’s ultimate strength. The objective is to investigate the effects of sudden damage, and progressive deterioration due to corrosion, on the ultimate strength of a ship which has been collided by another vessel. Explicit finite element analyses (FEA) of collision scenarios are presented where factors are varied systematically in a parametric study, e.g. the vessels involved in the collision, and consideration of corroded ship structure elements and their material characteristics in the model. The striking ship is represented by a coastal tanker while the struck ship is either a RoPax ship, or, a coastal oil tanker vessel. The crashworthiness of the struck ships is quantified in terms of the shape and size of the damage opening in the side-shell structure, and the division of energy absorption between the striking and struck ships for the different collision simulations. The ultimate strength of the struck ship is calculated using the Smith method and the shape and size of the damage openings from the FEA. In conclusion, the study contributes to understanding of how corroded, collision-damaged ship structures suffer significantly from a reduction in crashworthiness and ultimate strength, how this should be considered and modelled using the finite element method and analysed further using the Smith method.

Smith method

parametric study

ship-ship collision

ultimate strength



Jonas Ringsberg

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Zhiyuan Li

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Erland Johnson

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

RISE Research Institutes of Sweden

Artjoms Kuznecovs

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Roozbeh Shafieisabet

Ships and Offshore Structures

1744-5302 (ISSN) 1754-212X (eISSN)

Vol. 13 Sup1 155-166

Chalmers styrkeområde Transport – finansiering 2018

Chalmers, 2018-01-01 -- 2018-12-31.


Hållbar utveckling

Innovation och entreprenörskap



Teknisk mekanik







Grundläggande vetenskaper


C3SE (Chalmers Centre for Computational Science and Engineering)



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