The development of structural analysis of planing crafts has led designers and builders to look for further information on the real hull stress level, mainly when cruising at high speed and subject to high wave impact. With the appearance of exotic materials such as high strength fibers and PVC foam in sandwich construction, the light weight of the craft has become important when searching for high performance. Therefore designers have been looking for new structural analysis techniques for stress and strain calculations to find more realistic safety factors involved in the structural design of these boats. In this work, regarding the complexity of the model, boundary conditions,l oads, and mechanical properties, the finite element method was chosen to solve the problem, and a 50-foot sportfisherman, designed by Tom Fexas, and built in sandwich construction by Mares Marazul Shipyard, Rio de Janeiro, Brazil was modeled. In a second stage of the analysis, the bottom's high stress areas was refined to achieve the stress distribution in the bottom stringer system. Real conditions were simulated where the boat cruising at high speed collided with a characteristic wave; at this moment, stress and strain were evaluated. In order to compare the stress levels obtained with the finite element model, strain gauges measurements were taken in a real boat in a range of speeds.
Finite element structural analysis on planning boats due to wave impact
Strukturanalyse mit finiten Elementen an schnellfahrenden Booten zur Stoßsimulation durch Wellen
1992
6 Seiten, 6 Bilder, 3 Tabellen, 11 Quellen
Aufsatz (Konferenz)
Englisch
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