Evaluation of ultimate strength of stiffened panels under longitudinal thrust

Tanaka Satoyuki

Yanagihara Daisuke

Yasuoka Aya

Harada Minoru

Okazawa Shigenobu

Fujikubo Masahiko

Yao Tetsuya

Marine Structures

A series of collapse analyses is performed applying nonlinear FEM on stiffened panels subjected to longitudinal thrust. MSC.Marc is used. Numbers, types and sizes of stiffeners are varied and so slenderness ratio as well as aspect ratio of local panels partitioned by stiffeners keeping the spacing between adjacent longitudinal stiffeners the same. Initial deflection of a thin-horse mode is imposed on local panels and that of flexural buckling and tripping modes on stiffeners to represent actual initial deflection in stiffened panels in ship structures. On the basis of the calculated results, buckling/plastic collapse behaviour of stiffened panels under longitudinal thrust is investigated. The calculated ultimate strength are compared with those obtained by applying several existing methods such as CSR for bulk carriers and PULS. Simple formulas for stiffened panels, of which collapse is dominated fundamentally by the collapse of local panels between longitudinal stiffeners, are also examined if they accurately estimate the ultimate strength. Through comparison of the estimated results with the FEM results, it has been concluded that PULS and modified FYH formulas fundamentally give good estimation of the ultimate strength of stiffened panels under longitudinal thrust.

Stiffened panels

Longitudinal thrust

Buckling/plastic collapse

Ultimate strength

Nonlinear FEM analyses

Simple formulas

CSR-B

PULS

eng

Elsevier

© <2014>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/

This is not the published version. Please cite only the published version.

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[DOI] https://doi.org/10.1016/j.marstruc.2013.11.002 isVersionOf

日本学術振興会

Japan Society for the Promotion of Science

[Crossref Funder] https://doi.org/10.13039/501100001691

極限海象下における船体構造の崩壊解析に関する研究

Collapse Analysis of ship structure under extreme sea states

21760668