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Comparison of computational methods for evaluation of wave-load-induced fatigue damage accumulation in a containership structure detail

Viktor Ogeman (Institutionen för sjöfart och marin teknik, Marine Design) ; Wengang Mao (Institutionen för sjöfart och marin teknik, Marine Design) ; Jonas Ringsberg (Institutionen för sjöfart och marin teknik, Marine Design)
Proceedings of the Fifth International Conference on Computational Methods in Marine Engineering (MARINE 2013) in Hamburg, Germany, May 29-31, 2013 (Editors B. Brinkmann and P. Wriggers), International Center for Numerical Methods in Engineering (CIMNE), Barcelona, Spain p. 342-353. (2013)
[Konferensbidrag, refereegranskat]

In this study different methods, from linear strip theory to more complex non-linear panel methods, are employed to estimate the hydrodynamic loads on a 4400TEU container ship. Subsequently, the structural stresses are computed using the finite element method and engineering beam theory. The calculated stresses are used to evaluate the fatigue damage in a detail of the ship structure using the rainflow counting method and different spectral methods. It is concluded that, for the studied part of the structure with governing uniaxial stresses due to wave loading, disregarding vibrational responses, it is sufficient to evaluate the fatigue damage using a spectral method, i.e. the so-called narrow band approximation, without any compensation.

Nyckelord: Direct calculation, Engineering beam theory, Fatigue damage, FEM, Panel method, Rainflow counting, Spectral fatigue methods, Strip theory, Structural stresses



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Denna post skapades 2013-05-31. Senast ändrad 2014-01-15.
CPL Pubid: 177729

 

Institutioner (Chalmers)

Institutionen för sjöfart och marin teknik, Marine Design (2012-2014)

Ämnesområden

Transport
Hållbar utveckling
Sannolikhetsteori och statistik
Teknisk mekanik
Farkostteknik

Chalmers infrastruktur