In this paper, the structural design of mast and rigging of sail yachts is presented from a practical viewpoint, highlighting main idealization concepts of structural behavior. At fi rst, the analytical procedures available in open literature are briefl y reviewed, considering current industrial practice in scantling design of sail yachts. Applicable rules are considered as well. Then, more complex scantling procedures, taking advantage of modern computation facilities, are presented. Indeed, fi nite element (FE) analyses are more and more routinely used by designers. However, large deformations and slacking behavior of rigging and sails require nonlinear calculations, making convergence of algorithms diffi cult. In this case, limit states should be carefully defi ned; description of environmental actions and loads application on the structural system need engineering judgment, skill of FE analysts and sailing practice to completely understand the performance of the structure. Examples of applications on a typical modern sail yacht highlight that the design of these fascinating slender structures is really challenging and their design is still largely based on empiricism.
Scantling of mast and rigging of sail boats: a few hints from a test case to develop improved design procedures
RIZZO, CESARE MARIO;BOOTE, DARIO
2010-01-01
Abstract
In this paper, the structural design of mast and rigging of sail yachts is presented from a practical viewpoint, highlighting main idealization concepts of structural behavior. At fi rst, the analytical procedures available in open literature are briefl y reviewed, considering current industrial practice in scantling design of sail yachts. Applicable rules are considered as well. Then, more complex scantling procedures, taking advantage of modern computation facilities, are presented. Indeed, fi nite element (FE) analyses are more and more routinely used by designers. However, large deformations and slacking behavior of rigging and sails require nonlinear calculations, making convergence of algorithms diffi cult. In this case, limit states should be carefully defi ned; description of environmental actions and loads application on the structural system need engineering judgment, skill of FE analysts and sailing practice to completely understand the performance of the structure. Examples of applications on a typical modern sail yacht highlight that the design of these fascinating slender structures is really challenging and their design is still largely based on empiricism.
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