Abstract
The paper presents a hydrodynamic shape optimization procedure applicable at an early design stage to develop offshore structures with improved seakeeping qualities. Nonlinear programming algorithms are used to find minima of the selected objective function which qualifies the design. Evaluation and comparison of different designs are based on significant double amplitudes of forces and motions which are calculated for a given design sea spectrum. The hydrodynamic analysis is combined with long term wave statistics to minimize expected downtime. Due to a powerful automated shape generation and discretization technique, the procedure allows us to optimize different types of offshore structures. Results for various types of offshore structures are presented and verified by model tests.
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