An extensive study of a ship's survivability after collision – A parameter study of material characteristics, non-linear FEA and damage stability analyses
Journal article, 2012

Throughout the world, ships are continuously being declared as total losses and a significant part of these accidents are collisions between ships. The International Maritime Organization strives towards a more risk-based view on addressing the damage stability of ships. The current study addresses the survivability following a ship collision by the use of a sequential (de-coupled) computational methodology. The methodology is comprised of structural analysis of a collision scenario followed by dynamic damage stability simulations of the struck ship in order to establish the time to capsize of the struck ship. The emphasis of the current investigation is on the structural computations of the collision event; explicit finite element analyses are presented for a case study of a collision scenario. In particular, uncertainties of input parameters in the finite element simulations and their impact on the shape and size of the damage opening area, and time to capsize of the struck ship, are addressed. Material modelling aspects are studied; scatter in material properties within a material class as well as damage modelling. In addition, the effects of using a deformable or rigid striking bow section, the friction coefficient, the collision angle and the speed of the striking ship are studied. On the basis of the results presented, assumptions commonly used in these kinds of analysis are discussed. Recommendations for a sufficient level of simplifications for arriving at reliable results in numerical simulation of ship collisions are made.

Non-linear FEA

Analysis of variance

Fracture

Collision

Uncertainty analysis

Damage stability

Author

Per Hogström

Chalmers, Shipping and Marine Technology, Division of Marine Design

Jonas Ringsberg

Chalmers, Shipping and Marine Technology, Division of Marine Design

Marine Structures

0951-8339 (ISSN)

Vol. 27 1 1-28

Driving Forces

Sustainable development

Innovation and entrepreneurship

Areas of Advance

Transport

Materials Science

Roots

Basic sciences

Subject Categories

Reliability and Maintenance

Other Materials Engineering

Vehicle Engineering

DOI

10.1016/j.marstruc.2012.03.001

More information

Created

10/8/2017