ISUM approach for collapse analysis of double-bottom structures in ships

Masahiko Fujikubo; Daisuke Yanagihara; Yuu Setoyama; Daniel Virgil Olaru

ISUM approach for collapse analysis of double-bottom structures in ships

Masahiko Fujikubo, Daisuke Yanagihara, Yuu Setoyama, Daniel Virgil Olaru

Research output: Contribution to journal › Article

Abstract

An application of ISUM to analyse the collapse behaviour of large ship structural modules is developed. The system analysis of a double-bottom structure as well as isolated floor and girder models is achieved with models consisting of large plate elements and beam-column elements for the inner and outer bottom plating and of Timoshenko beam elements for the girder web plates. Fundamental collapse modes and localized failures in a double-bottom structure under pressure loads are obtained in a very short time compared to FEM. Local collapse of rectangular plate panels under transverse thrust rapidly spreads from the central area of the double-bottom towards the sides and stool supports, but the structure exhibits considerable reserve strength in the overall bending.

Original language	English
Pages (from-to)	224-231
Number of pages	8
Journal	International Journal of Offshore and Polar Engineering
Volume	13
Issue number	3
Publication status	Published - Sep 2003
Externally published	Yes

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Ocean Engineering
Mechanical Engineering

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Fujikubo, M., Yanagihara, D., Setoyama, Y., & Olaru, D. V. (2003). ISUM approach for collapse analysis of double-bottom structures in ships. International Journal of Offshore and Polar Engineering, 13(3), 224-231.

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AB - An application of ISUM to analyse the collapse behaviour of large ship structural modules is developed. The system analysis of a double-bottom structure as well as isolated floor and girder models is achieved with models consisting of large plate elements and beam-column elements for the inner and outer bottom plating and of Timoshenko beam elements for the girder web plates. Fundamental collapse modes and localized failures in a double-bottom structure under pressure loads are obtained in a very short time compared to FEM. Local collapse of rectangular plate panels under transverse thrust rapidly spreads from the central area of the double-bottom towards the sides and stool supports, but the structure exhibits considerable reserve strength in the overall bending.

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