Title
Impact resistance cryogenic bunker fuel tanks
Author
Voormeeren, L.O.
Atli-Veltin, B.
Vredeveldt, A.W.
Publication year
2014
Abstract
The increasing use of liquefied natural gas (LNG) as bunker fuel in ships, calls for an elaborate study regarding the risks involved. One particular issue is the vulnerability of cryogenic LNG storage tanks with respect to impact loadings, such as ship collisions and dropped objects. This requires an understanding of the impact resistance of the storage tanks and the actual loads to be expected. No substantial literature exists on the actual energy absorbing capacity (crashworthiness) of cryogenic tanks. Main issues are material properties under cryogenic/moderate strain rate conditions and failure mechanisms associated with large deformation - fluid structure interaction, in particular the liquid-full condition. This paper reports material properties of stainless steel 304 at both ambient and cryogenic conditions. Also the effect of strain rate is addressed. Moreover, it describes and compares two approaches of predicting the effect of the 'liquid-full' condition on the impact resistance of LNG storage tanks. The first approach follows a multi-material Arbitrary-Lagrangian-Eulerian (ALE) formulation, whereas the second approach captures the fluid-structure interaction through an analytical loading subroutine, calculating the internal pressure as a function of tank volume decrease. Results of impact experiments on partially liquid-filled small-scale storage tanks are presented. The calculation methods have been validated against the experimental results. The results of the validation show that the crashworthiness of stainless steel (cryogenic) storage tanks can be well predicted through both the ALE and the analytical formulation.
Subject
Building Engineering & Civil Engineering
SD - Structural Dynamics
TS - Technical Sciences
High Tech Maritime and Offshore Systems
Marine
Industrial Innovation
Cryogenic
Impact
LNG bunker fuel
Pressure tanks
Crashworthiness
Fluids
Fuels
Loading
Ships
Strain rate
Finite element simulations
Pressure tanks
Stainless steel-304
To reference this document use:
http://resolver.tudelft.nl/uuid:57865669-9b8e-47f4-a631-52c164218e05
DOI
https://doi.org/10.1115/omae2014-23909
TNO identifier
520187
Publisher
American Society of Mechanical Engineers (ASME)
ISBN
9780791845431
Source
Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE, 4B, 1-9
Document type
conference paper