Numerical investigation on dynamic ultimate strength of stiffened panels considering real loading scenarios

Abstract

In the last 10 years, the importance of whipping on the extreme hull girder loads has received much attention from designers and classification societies. The most common practice to evaluate the ultimate strength of a relatively soft floating structure is to compare the maximum dynamic vertical bending moment after a slamming event with the quasi-static hull girder capacity. Some aspects regarding the current procedure remain unclear, like the capability of the current hydro-elastic methods to accurately predict the extreme dynamic response on the basis of a linear elastic structural model. Moreover, the whipping-induced stresses have a higher frequency than the ordinary wave-induced stresses; hence, the dynamic effects may provide additional strength reserves for the structure and should be investigated. Therefore, the aim of this paper is to investigate the dynamic ultimate strength of stiffened panels considering real loading scenarios, associated with wave loads and whipping response.

Full-scale collapse testing of a steel stiffened plate structure under cyclic axial-compressive loading

“…Very recently, Li et al [13] proposed an analytical method to predict the ultimate strength behaviour of steel plates and stiffened panels under various patterns of cyclic loading. Jagite et al [14] investigated dynamic ultimate strength behaviour of steel stiffened plate structures under more realistic scenarios of cyclic loading. In fact, this problem may also be associated with shakedown limit states [15,24].…”

A Two-Step Approach for Evaluating the Dynamic Ultimate Load Capacity of Ship Structures

“…Jagite et al [24] defined dynamic ultimate capacity as the maximum load that can be applied to the ship structure without causing structural collapse. When the impact duration is large, the dynamic ultimate load capacity becomes easier to calculate by the FEM.…”

An empirical formula to assess ultimate strength of initially deflected plate: Part 1 = propose the general shape and application to longitudinal compression

“…The ultimate limit state (ULS), accident limit state (ALS), fatigue limit state (FLS), and serviceability limit state (SLS) can be subsumed under the LSD category (Paik, 2018). Concerning LSD, several studies have recently been conducted by many research groups (Ao et al, 2020;Doan et al, 2020;Georgiadis and Samuelides, 2019;ISSC, 2018;Jagite et al, 2019;Kong et al, 2020;Lee et al, 2019;Lee and Paik, 2020;Li and Benson, 2019;Li et al, 2020;Li et al, 2021;Shi and Gao, 2020;Tatsumi and Fujikubo, 2020;Tatsumi et al, 2020;Zhang et al, 2020).…”