Structural analysis of SLICE hulls
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The overall objective of this work is to investigate the structural aspects of a novel hull design called SLICE, developed by Lockheed under contract to Office of Naval Research. The program MAESTRO (The Method for Analysis, Evaluation, and Structural Optimization), which is a finite element-PC based analysis tool designed to facilitate the modeling of ocean engineering structures was used for the investigation. A three dimensional model of the SLICE structure was exposed to six different load cases. Each load case represents a different wave to hull angle interaction. Three cases were subjected to sea state 5, and the last three cases were exposed to sea state 8. Since the SLICE lacks the continuous underwater hull that offers the large longitudinally rigidity for the SWATH, its longitudinal structure is of concern and the transverse structure becomes a concern with the possibility of severe torsional loads midships on the box. The following concerns are addressed in this work: (1). Compare and verify the SLICE structure's reactions to the different load cases with known SWATH reactions. (2). Verify if the beam seas which provide the maximum prying side force in the SWATH also affect the SLICE structure similarly. (3). Validate the program MAESTRO by varying structural parameter for the "box" of the SLICE structure and then exposing it to the same load cases and comparing to the baseline model.
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