An integrated approach was developed that simultaneously covered all relevant aspects of early ship design: main dimensions, hull form, hydrodynamics and powering; structures, strength and weight estimates; safety including intact and damage stability; economics; and regulatory requirements. An example application was presented for an Aframax tanker with the aim of realizing better safety (lower OOI), efficiency (lower EEDI) and economics (lower RFR). Formal explorations and exploitations were combined to investigate the design space and, subsequently, advance competing design proposals into certain directions. About 2500 variants were realized, each instance having its individual hull form (outer shell), tank compartmentation and an inner steel structural system. The integrated system brings together sophisticated software systems for analysis and simulation. Challenging issues, like CFD simulations, can be replaced by systematic numerical series and suitable meta-models (RSM). This not only speeds up the time needed for investigations by several orders of magnitude but it also reduces the complexity associated with CFD analyses and, hence, allows to already utilize them early in the process when gains are potentially the highest. The presented example showed that once a (quasi-randomly created) database of variants is available it is quick and easy to search for the preferred combination of measures of merit. One may then choose a more conservative design, being a balanced all-rounder, or deliberately decide to favor a more extreme solution, featuring excellent performance in one measure of merit. Additional investigations can be done easily once the CAE environment is established, for instance to gain an appreciation of the relationship between costs and safety or to cheek the robustness of the favored design. Setting up an integrated approach still requires quite some effort at this point in time. Nevertheless. the necessary software is available and the presented project proved feasibility. Major prerequisites are parametric models which allow automation. Significant design improvement can then be realized even for moderate deviations from established design practice.
An integrated approach for simulation in the early ship design of a tanker
COMPIT, International Conference on Computer and IT Applications in the Maritime Industries, 10 ; 411-425
Schriftenreihe Schiffbau ; 650
2011
15 Seiten, 13 Bilder, 5 Tabellen, 12 Quellen
Aufsatz (Konferenz)
Englisch
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