Abstract
Thin-walled stiffened panels are fundamental structural components that form the primary structure of the ship hull. The effectiveness of the stiffener configuration design needs to be assessed because members are unavoidably subjected to various load types during operations. In this situation, assessment is required to quantify the responses and determine the relationship between the structural resistance and input parameters. The aim of this work was to obtain structural resistance data on the stiffened side hull of a medium-sized tanker with various model configurations by using finite element analysis with different loading parameters, i.e., load type and angle, as the main inputs. The results indicate that stiffener configurations subjected to loads at the center and random positions influence the effectiveness in reducing the deformation. The results show that the stiffener is more effective when the location of the force is very close to the stiffener. Therefore, higher strength can be obtained with a design in which the area that is not supported by the stiffener is minimized.
Highlights
E ultimate strength of stiffened plates has been researched from various perspectives by employing different approaches that aim to investigate the influence of combinations of parameters on structural responses
Experimental and numerical investigations on the ultimate strength of stiffened plates subjected to combined biaxial compression and lateral loads showed that lateral pressure enhanced the loadcarrying capacity when the lateral force restrained deformation, as investigated by Ma et al [6]
The effects of various configurations of the stiffener cross section were numerically investigated by Ren et al [28] to determine the most suitable type to replace the original steel stiffener in the upper deck of a warship. e configuration of the stiffener/girder cross section has been investigated in other structural parts of different kinds of ships, such as the side hull [29], car deck [30], stern ramp door [31], unsymmetrical plate girder [32], and hull girder of a very large crude oil carrier (VLCC) [33]. e design that achieves the highest strength-to-weight ratio is identified as the best
Summary
The force types acting on a stiffened plate are in-plane compression or tension from the overall hull-girder bending moment or torsion, the shear force resulting from the hull-girder shear force, and lateral pressure from the external wave or shock loading [34]. The stiffened plate can be subjected to loads with various force directions and angles simultaneously to determine the structural response. The solid element in finite element analysis has certain advantages compared to the shell and has desirable characteristics in numerical calculations: i.e., the solid element has no geometric limitations, requires no geometric preprocessing, and allows stress and strain to be profiled through the thickness. Both the shell and solid elements are superior in terms of the meshing freedom. The acquired criteria were applied to the geometry, which was designated as the subject of finite element calculations
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