Reduction in ultimate strength capacity of corroded ships involved in collision accidents
Paper in proceedings, 2017

There are many studies in the literature which 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 of the current investigation is to study the effects of sudden damage (ship-ship collision), and progressive deterioration due to corrosion, on the ultimate strength of a ship which has been collided by another vessel. Explicit finite element analyses of collision scenarios are presented where several 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 vessels 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 vessel, for each collision simulation, is calculated using the Smith method and the shape and size of the damage openings from the finite element analyses. 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

ultimate strength

Corrosion

ship-ship collision

Author

Jonas Ringsberg

Chalmers, Shipping and Marine Technology, Marine Technology

Zhiyuan Li

Chalmers, Shipping and Marine Technology, Marine Technology

Erland Johnson

Chalmers, Shipping and Marine Technology, Marine Technology

RISE Research Institutes of Sweden

Artjoms Kuznecovs

Chalmers, Shipping and Marine Technology, Marine Technology

Roozbeh Shafieisabet

Chalmers, Shipping and Marine Technology, Marine Technology

Proceedings of The 2nd International Conference on Ships and Offshore Structures (ICSOS 2017)

127-140 ICSOS2017-008

The 2nd International Conference on Ships and Offshore Structures (ICSOS 2017)
Shenzhen, ,

Subject Categories

Mechanical Engineering

Vehicle Engineering

Metallurgy and Metallic Materials

Corrosion Engineering

Driving Forces

Sustainable development

Innovation and entrepreneurship

Areas of Advance

Transport

Materials Science

Roots

Basic sciences

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

More information

Latest update

10/8/2018