Abstract
Abstract This work aims to investigate the mechanical behavior of steel-plated structures under a raking incident and to quantify the effect of the mesh size in nonlinear finite element (NLFE) analysis. To conveniently comprehend nonlinear phenomena, i.e., the grounding which takes place in this work, a series of theoretical contact formulations was defined. In the main analysis, raking, which is a part of the grounding scenario, was strictly assumed as contact between a tanker, which was assumed to have thin-walled steel, and a seabed rock in the form of a solid obstruction. Designed raking scenarios were calculated using the FE method by using the nonlinear phenomena of the material behavior in the calculation. The findings of this work indicated that the possibility of expanding the recommended mesh size in FE simulation should be evaluated by quantifying the behavior of structural responses, such as energy, the force damage pattern, and acceleration, subjected to a variety of applied meshing techniques. The results concluded that a notable difference occurred when the mesh size was more than 132 mm (ratio 11 based on the plate dimension in this work), and this size is strictly recommended to be used for calculation of the element length-to-thickness (ELT) ratio. Assessment in time simulation showed that applying larger mesh sizes will reduce the simulation time but increase the maximum values of the crashworthiness parameters, i.e., energy, force, acceleration, and displacement.
Highlights
This work aims to investigate the mechanical behavior of steel-plated structures under a raking incident and to quantify the effect of the mesh size in nonlinear finite element (NLFE) analysis
The findings of this work indicated that the possibility of expanding the recommended mesh size in Finite Element (FE) simulation should be evaluated by quantifying the behavior of structural responses, such as energy, the force damage pattern, and acceleration, subjected to a variety of applied meshing techniques
The results concluded that a notable difference occurred when the mesh size was more than 132 mm, and this size is strictly recommended to be used for calculation of the element length-to-thickness (ELT) ratio
Summary
Abstract: This work aims to investigate the mechanical behavior of steel-plated structures under a raking incident and to quantify the effect of the mesh size in nonlinear finite element (NLFE) analysis. Active, numerous improvements to navigational and sailing instruments have been conducted to provide better ship operability, especially in critical conditions (fog, heavy sea and narrow waterways) and extreme regions (the Arctic [8, 9], and disaster-prone regions) These efforts aim to avoid such accidental loads (for example, collisions and groundings) from taking place so that the risks of oil spillage and foundering can be reduced as much as possible. Many problems in the field of accidental loads for marine structures require more recent investigation and evaluation due to the nature of collisions and groundings as nonlinear phenomena Advanced computational methodology, such as the Finite Element (FE), is taken as a decent solution for calculating structural responses. An evaluation of the results will provide an estimation that will assist with expanding the current meshing strategy so that calculation times can be improved without neglecting the reliability aspect or similarity of the calculation results of the selected reference
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
