Estimation of ultimate strength of continuous stiffened panel under combined transverse thrust and lateral pressure Part 1: Continuous plate

Abstract

A simplified method to estimate the ultimate strength of a continuous plate, typical in ship bottom plating, subjected to combined transverse thrust and lateral pressure is developed. A series of elastic/ elastoplastic large deflection finite element analysis (FEA) of a continuous plate supported along the lines of longitudinal stiffeners and transverse frames is performed. Attention is focused on the effect of a continuity of plating on its buckling and ultimate strengths, while the previous studies are mainly concerned with an isolated plate. Based on the FEA results, a set of formulae has been derived for the estimation of the ultimate strength of a continuous plate under combined transverse thrust and lateral pressure. An increase of elastic buckling strength and a change in the collapse mode from a simply supported mode to a clamped mode are considered as an effect of a continuity of plating. It has been proven from a comparison with FEA that the proposed formulae give very accurate predictions of the ultimate strength. r

Collapse Strength of Intact Ship Structures

“…Numerous authors have also studied the combined compressive loading and lateral pressure effects on the load capacity of plates [17,20,[81][82][83][84].…”

Ultimate strength formulation of stiffened panels under in-plane compression or tension with cracking damage

“…-Sideways initial deflection of stiffeners due to angular rotation about the panel-stiffener intersection line (Fujikubo et al, 2005):…”

Application of artificial neural networks to the evaluation of the ultimate strength of uniaxially compressed welded stiffened aluminium plates

“…37 Although it is assumed to be in a buckling mode in some research studies, the real shape of the initial deflection can be considered to be in a socalled thin-horse mode. 38,39 There are also different methods in order to establish such a complex thin-horse mode of the initial deflection in the plate and stiffener elements of the stiffened plates. One of the methods recently adopted by some researchers in a benchmark study on the ultimate strength analysis of stiffened aluminium plates 19 is selected in this paper.…”