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Article

On the Modeling of Ship Stiffened Panels Subjected to Uniform Pressure Loads

by
Efstathios L. Platypodis
and
Konstantinos N. Anyfantis
*
Shipbuilding Technology Laboratory, School of Naval Architecture and Marine Engineering, National Technical University of Athens, 9 Heroon Polytechniou Av., Zografos, 15780 Athens, Greece
*
Author to whom correspondence should be addressed.
Appl. Mech. 2022, 3(1), 125-143; https://doi.org/10.3390/applmech3010010
Submission received: 7 January 2022 / Revised: 27 January 2022 / Accepted: 28 January 2022 / Published: 1 February 2022
(This article belongs to the Special Issue Mechanics and Control using Fractional Calculus)

Abstract

Stiffened panels constitute structural assemblies of the entire ship hull, i.e., double bottom, side shell, deck areas, etc. Prescriptive dimensioning of the stiffeners (web thickness and height and flange thickness and breadth) is solely based on the application of beam bending theories. This work is divided into two parts. The first part involves the assessment of the structural response of one-way (single-bay) stiffened panels under uniform pressure. The objective is to evaluate the effectiveness of alternative approaches in obtaining accurate secondary stress fields. Both state-of-the-art analytical solutions (Paik, Schade, CSR, Miller) and numerical calculation tools (finite element analysis (FEA)) are employed and compared for this purpose. When it comes to cross-stiffened panels, numerical methods are usually used within the design process which is time demanding. The second part of this work focuses on the development of a fast, yet effective, prescriptive approach. This approach will allow the dimensioning of the longitudinal stiffeners by considering the secondary stress field. Combining finite element analysis and the Euler–Bernoulli bending theory, the effect of the transverse stiffeners to the longitudinal stiffeners is examined in order to estimate the type of support on the boundaries of the transverse stiffeners. Determining the type of support, will make it possible to apply the classical formula of bending stress instead of using finite element analysis, thus limiting the computational cost. Preliminary calculations show that most of the examined cases may be treated as fully clamped beams subjected to uniform pressure.
Keywords: stiffened panels; shear lag; beam bending; finite element analysis (FEA) stiffened panels; shear lag; beam bending; finite element analysis (FEA)

Share and Cite

MDPI and ACS Style

Platypodis, E.L.; Anyfantis, K.N. On the Modeling of Ship Stiffened Panels Subjected to Uniform Pressure Loads. Appl. Mech. 2022, 3, 125-143. https://doi.org/10.3390/applmech3010010

AMA Style

Platypodis EL, Anyfantis KN. On the Modeling of Ship Stiffened Panels Subjected to Uniform Pressure Loads. Applied Mechanics. 2022; 3(1):125-143. https://doi.org/10.3390/applmech3010010

Chicago/Turabian Style

Platypodis, Efstathios L., and Konstantinos N. Anyfantis. 2022. "On the Modeling of Ship Stiffened Panels Subjected to Uniform Pressure Loads" Applied Mechanics 3, no. 1: 125-143. https://doi.org/10.3390/applmech3010010

APA Style

Platypodis, E. L., & Anyfantis, K. N. (2022). On the Modeling of Ship Stiffened Panels Subjected to Uniform Pressure Loads. Applied Mechanics, 3(1), 125-143. https://doi.org/10.3390/applmech3010010

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