Influence of different wave load schematization on global ship structural response
Paper i proceeding, 2018

Today, direct calculation using complete/full ship finite element (FE) models is the standard practice in structural design of complex ships (cruise and passenger ships, Ro-Ro, container ship, etc.). In the early design stage, time is one of the main drivers; therefore, linear static FE analysis is a common practice and considerable simplification in modelling (structural and loading) is needed to maintain time efforts within the required targets. Classification societies cover all those aspects through different design guidelines that help structural designers to streamline the design process and make rule-requested structural verification of the proposed design. Structural modelling aspects are well defined and established, but for the wave load modelling some questions arise. Wave pressure distribution can be defined using direct wave calculations (e.g. the panel method) or using the rule formulae definition. This paper presents a benchmark study carried out by the ISSC2018 Committee II-1 Quasi-Static Response. The objective was to investigate and compare alternatives to discretize and implement rule-defined wave loads from different classification societies on global FE models, and its impact on the global structural response. Results from calculations are presented on two ship types, a typical cargo ship and a passenger ship. Findings highlight the importance of identifying the lowest level of simplification in order to capture physical phenomena while minimizing errors and inaccuracy in direct structural analyses results.

wave loads modelling

Global FE model

structural response

Författare

Matteo Sidari

Fincantieri

Jerolim Andric

Sveučilište u Zagrebu

Jasmin Jelovica

University of British Columbia (UBC)

James Underwood

BMT Defence Services Ltd

Jonas Ringsberg

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Proceedings of The 3rd International Conference on Ships and Offshore Structures (ICSOS 2018)

1-10 ICSOS2018-033

The 3rd International Conference on Ships and Offshore Structures (ICSOS 2018)
Gothenburg, Sweden,

Chalmers styrkeområde Transport – finansiering 2018

Chalmers styrkeområde Transport, 2018-01-01 -- 2018-12-31.

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Styrkeområden

Transport

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Teknisk mekanik

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Grundläggande vetenskaper

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2018-10-11