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Strength Analysis of Superyacht Superstructures with Large Openings


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DOI: https://doi.org/10.15866/ireme.v11i1.9289

Abstract


The superyacht manufacturing industry is currently facing big challenges, mainly related to the present economic crisis. Manufacturers are then competing on the ground of better and more aesthetic external and interior designs. This trend often leads to structural strength related issues, which can compromise the static or dynamic stability of superyacht hull. In several instances, the aforementioned fact is met, as in large openings and docks to recover tenders and the enlargement of windows to allow for better lighting of internal living spaces. So, for what the hull is concerned, large windows replaced small portholes on the yacht sides at mid length, rising non trivial problems about longitudinal strength. The same trend appeared on superstructures sides where traditional windows have been enlarged till to become glass doors extended from deck to deck allowing passengers to enjoy full sea landscapes. Despite the positive effect on the general design performance, this nice innovation implies serious structural problems. In fact in side areas where these doors are fitted the only structural elements are represented by very slender vertical stiffeners. The combined action of bending and compressive loads, together with the fact that superstructures are usually made by aluminium light alloy, can be the cause of buckling phenomena with severe consequences on structure and glass integrity. The same aspect has a negative influence on the bending efficiency of superstructures, meaning by that the level of cooperation of superstructures with hull strength. In this paper the contribution to steel hull strength of light alloy superstructures with large openings is studied by the finite element approach. The contribution of glazing windows to the primary response to global bending moment has been assessed as well.
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Keywords


Superyacht; Strength Analysis; FEM; Glazing Structures; Bending Efficiency

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References


Caldwell J.B.,The effect of superstructures on the longitudinal strength of ships, trans. R.I.N.A. 1957.

Johnson A.J., Stresses in deckhouse and superstructure’, trans. R.I.N.A. 1957.

Chapman J.C., The interaction between a ship hull and a long superstructures, trans. R.I.N.A. 1957.

AlbertoniF., Barbato A., Ivaldi A., Hull – superstructure interaction. A naval ship case – study, 2000.

Zanic V., Andric J., Preberg P., Superstructure deck effectiveness of the generic ship types – a concept design methodolog’, Maritime Transportation and Exploration of Ocean and Coast Resources 2005.

Okumoto Y., Takenda Y., Mano M., Okada, T., Design of ship hull structures, Springer, 2009.

Roy J., Munro B., Walley S., Meredith A., Longitudinal versus Transversely Framed Structures for Large Displacement Motor Yachts, 20th International HISWA Symposium on Yacht Design and Yacht Construction, Amsterdam, The Netherlands, 2008.

Mackney M. D. A., Foss C.T.F., Superstructure effectiveness in the preliminary assessment of the hull behavio’, Marine Technology, Vol 36, n°1, January 1999.

R.I.Na., Rules for the classification of yachts designed for commercial use, 2013.

Msc Software Company, Nastran User Guide, Newport Beach, CA, USA, 2014.

Verbaas S., van der Werff T., Structural design and loads on large yachts, 17th International HISWA Symposium on Yacht Design and Yacht Construction, Amsterdam, The Netherlands, 2002

Jansen K.M., Glass as a load bearing material in yacht industries,23rd International HISWA Symposium on Yacht Design and Yacht Construction, Amsterdam, The Netherlands, 2014

Verbaas F., Use of glass and the regulations, 22nd International HISWA Symposium on Yacht Design and Yacht Construction, Amsterdam, The Netherlands, 2012

Gragnani L., Tonelli A., Boote D., Pais T., Experimental investigation on the damping coefficient of laminated glass for large yachts, NAV 2015 18th International Conference on Ships and Shipping Research, Lecco (IT)

Gragnani L., Tonelli A., Boote D., Pais T., Acoustic characterization of laminated glass for superyacht windows, Design & Construction of Super & Mega Yachts, 13-14 May 2015, The GelataMuseo del Mare, Genoa (IT)


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