Trans RINA, Vol 153, Part B2, Intl J Small Craft Tech, 2011 Jul-Dec


analysis via the implemented finite element analysis, as described in section 3.2. A homogenous and isotropic sailcloth has been chosen for both sails (E = 5 GPa and thickness = 0.5 mm). The mechanical properties of battens are listed in Table 7. As soon the non-linear finite element analysis achieves


convergence, stress and


displacement are presented with numerical data and graphical plots (Figure 5).


Table 7: Battens section and stiffness. Batten


Jib


Section [mm]


1 2 3 4 5


4 x 26 4 x 26 4 x 28 4 x 28 -


E [GPa]


35 35 35 35 -


Mainsail


Section [mm]


19 x 8


19 x 10 38 x 14 38 x 14 38 x 14


Table 8: Structural analysis main results. Jib


Figure 4: Pressure distribution and wake shape resulting from the aerodynamic analysis.


δmax (% luff) σmax


Clew load


Halyard load Tack load


0.23 m (1.2%) 104 MPa 8.4 kN 8.6 kN 1.6 kN


E [GPa]


35 35


112 112 112


Mainsail


0.26 m (1.3%) 85 MPa 12.8 kN 11.4 kN 1.5 kN


Figure 5: Stress distribution on the TP52 sailplan, resulting from the structural analysis (threshold set to 15 MPa). H = high stress zone (clew and head corner).


The aerodynamic loads are automatically transferred onto the FEM of the sailplan to perform the structural


B-122


Figure 6: Total displacement distribution on the TP52 sailplan, resulting from the aeroelastic analysis. H = high displacement zone (upper leech).


©2011: The Royal Institution of Naval Architects


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