Ultimate Strength Analysis of Stiffened Marine Structures
Summary
Ultimate strength analysis seeks to determine the maximum load-carrying capacity of ship and offshore structures composed of plates stiffened by longitudinal or transverse members. These stiffened panels form the primary load path under bending, compression and combined wave and gravity loading. Research combines theoretical formulations, experimental measurements and nonlinear finite-element simulations to capture the influence of geometric imperfections, welding-induced residual stresses, material nonlinearity and long-term degradation such as corrosion. Benchmark studies under uniaxial compression have driven convergence of design rules, while novel equivalent-layer approaches and data-driven surrogates are enabling rapid strength prediction at the design stage. Understanding ultimate limit states is critical for safe, weight-efficient hull girder design, for both intact and damaged conditions, and underpins global classification rules and risk-based assessments.
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Ultimate Strength Analysis of Stiffened Marine Structures publication trend
The graph below shows the total number of articles in ultimate strength analysis of stiffened marine structures across all publications each year (not limited to Nature Index journals).
Technical terms
Ultimate limit state (ULS): The condition at which a structure reaches its maximum load-carrying capacity before collapse or unacceptable deformations.
Buckling: A sudden lateral deflection or mode change in a structural member under compressive or bending loads leading to strength loss.
Stiffened panel: A plate element reinforced by longitudinal or transverse stiffeners to increase load capacity and resistance to buckling.
Nonlinear finite-element method (NLFEM): A computational simulation technique that accounts for material and geometric nonlinearity to predict post-yield and post-buckling behaviour.
References
- The ISSC 2022 committee III.1-Ultimate strength benchmark study on the ultimate limit state analysis of a stiffened plate structure subjected to uniaxial compressive loads. Marine Structures (2021).
- Computationally aware estimation of ultimate strength reduction of stiffened panels caused by welding residual stress: From finite element to data-driven methods. Engineering Structures (2022).
- Application of Equivalent Single Layer Approach for Ultimate Strength Analyses of Ship Hull Girder. Journal of Marine Science and Engineering (2022).
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