Effects of the rebounding of a striking ship on structural crashworthiness during ship-ship collision
TLDR
In this paper, the authors study the rebounding phenomenon of a striking ship and its effect on the structural crashworthiness of the struck ship, and the results of the evaluation indicate that in the event of a side collision, the striking ship can either fully stuck or rebounding phenomena.Abstract:
The purpose of this paper is to study the rebounding phenomenon of a striking ship and its effect on the structural crashworthiness of the struck ship. Pioneer works on ship collision and mathematical formulations to assess energy after collision are described to summarize the behaviour of the ship structure under collision between ships in various scenarios. A benchmark study is conducted using laboratory tests of the resistance to penetration of a stiffened plate to validate the methodology of the present work, which uses finite element methods to model a series of dynamic collision scenarios. The setting and configuration of a full-scale collision analysis is introduced, along with the configurations of the defined scenarios. External and internal ship collision parameters are considered as parameters that will affect structural behaviour prior to and after ruptures. The results of the evaluation indicate that in the event of a side collision, the striking ship can either fully stuck or rebounding phenomena. These phenomena produce significant differences in term of internal energy and crushing force, which are included as crashworthiness criteria. The type of striking ship, as well as its velocity, significantly affects the rebounding of the striking ship and behaviour of the struck ship. A notable gap between medium and high-carbon steels is not found during observations of the structural crashworthiness accounting for structure materials. Finally, other criteria for assessing the mechanisms and effects of rebounding during a collision are summarized, i.e. kinetic energy, acceleration, and extent of damage.read more
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References
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Book
Finite Element Procedures
TL;DR: The Finite Element Method as mentioned in this paper is a method for linear analysis in solid and structural mechanics, and it has been used in many applications, such as heat transfer, field problems, and Incompressible Fluid Flows.
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On the resistance to penetration of stiffened plates, Part II: Numerical analysis
TL;DR: In this article, a series of indentation tests have been carried out quasi-statically on various configurations of stiffened panels and the performance of two failure criteria, referred to as the BWH instability criterion and the RTCL damage criterion, were investigated.
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On the resistance to penetration of stiffened plates, Part I – Experiments
Hagbart S. Alsos,Jørgen Amdahl +1 more
TL;DR: In this paper, a ship is assumed to settle vertically on a rock and contact actions are local and restricted to one plate section, and various configurations of stiffened panels are loaded laterally by a cone shaped indenter until fracture occurs.
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Practical techniques for finite element modeling to simulate structural crashworthiness in ship collisions and grounding (Part I: Theory)
TL;DR: In this article, the authors developed practical techniques useful for FE modeling to simulate structural crashworthiness of ships in collisions or grounding, which can be applied to existing test structural models, which involve both crushing and fracture behavior, are shown by a comparison with the experimental results and corresponding FE simulations to confirm the validity of the proposed methods.
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On the Reliability and Validity of Ship–Ship Collision Risk Analysis in Light of Different Perspectives on Risk
Floris Goerlandt,Pentti Kujala +1 more
TL;DR: In this paper, the reliability and validity of QRA through a case study of ship-ship collision risk is investigated. But, the reliability of the proposed encounter detection mechanisms is questionable and significant uncertainty is found regarding this encounter definition in the selected methods.