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Structural desin of a bulbous bow with regard to collision safety
Publikationstyp
Conference Paper
Date Issued
2013
Sprache
English
Author(s)
TORE-URI
Start Page
901
End Page
911
Citation
Marine 2013 : computational methods in marine engineering V ; proceedings of the V International Conference on Computational Methods in Marine Engineering, held in Hamburg, Germany, 29 - 31 May 2013 / CIMNE. Birgitt Brinkmann ... (ed.). - 1. ed. - Barcelona : Internat. Center for Numerical Methods in Engineering, 2013. - Seite 901-911
Contribution to Conference
Publisher
Internat. Center for Numerical Methods in Engineering
Dimensioning of bulbous bows is based on conservative and usually empirically developed Classification Rules. Furthermore their structural design is subordinate to manufacturing aspects. Thus bulbous bow structures are mostly overdimensioned and could be regarded as rigid in case of a ship collision. Weakening bulbous bows stiffness results in noticeable influence on absorbable collision energies. Anyhow this approach is limited because usual operating loads like hydrostatic pressure or slamming loads are still to be considered. The paper describes a design approach for bulbous bows that aims at the best compromise between preferably weak regarding collision load on the one hand and preferably stiff under operating load on the other hand. Linear and nonlinear FEM-calculations based on ultimate load theory are combined in order to estimate stability of weakened designs. Examinations are accompanied by nonlinear explicit FEM-calculation of a ship collision scenario taking into account stiffness of striking and struck ship.
Subjects
Buffer bow
Bulbous bow
Crashworthiness
Ship collision
Structural design
DDC Class
600: Technik
620: Ingenieurwissenschaften