Ship structural design support methodology for the reliability based design optimization (RBDO)

Žanić, Vedran and Pirić, Karlo and Prebeg, Pero (2014) Ship structural design support methodology for the reliability based design optimization (RBDO). = Ship structural design support methodology for the reliability based design optimization (RBDO). In: ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2014, 08-13.06.2014., San Francisco; United States.

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The objective of the paper is to present the structural design support system (DeSS) rationale for the reliability based design optimization (RBDO) in the concept design phase. Basic steps are as follows: • Interactive identification of the design problem (design variables, constraints, objectives) as well as design problem variates and their distribution parameters. Safety related design criteria are used as objectives and as constraints in the presented procedure; • Calculation of the cross section ultimate longitudinal strength criteria based on the extended Smith's method; based on the Report SSC-398; • Selection of non-dominated designs (Pareto-optimal, NDD points) for the given deterministic design criteria; • Calculation of reliability/deterministic safety measures. Novel FASTREL code, based on the Dimension Reduction Method (DRM) is used for the reliability calculations; • Generation of insight into the Multi Attribute Decision Making (MADM) process with 5D graphic presentation of designs in design and attribute spaces in the interactive OCTOPUS Designer (Demak/DeView) IT modules. Practical application of the developed concept design methodology and of the design environment to the structural design of the verifiable test example corresponding to SSC-398 report. DeSS was used in fast generation of optimal designs using MODM (MOSLP) and MADM (MOPSO) techniques. To speed up the RBDO design process deterministic and probabilistic formulations of design problem were run concurrently and supporting each other are presented using the safety related design attributes (deterministic and reliability based) for the NDD supported decision-making technique. Copyright © 2014 by ASME.

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): Decision making; Machine design; Naval architecture; Pareto principle; Reliability; Safety engineering; Structural design; Dimension reduction method; Distribution parameters; Interactive identification; Multi attribute decision making; Probabilistic formulation; Reliability calculation; Reliability-based design optimization; Structural design support systems; Design
Divisions: 600 Department of Naval Engineering and Marine Technology > 620 Chair of Marine Structures Design
Indexed in Web of Science: Yes
Indexed in Current Contents: No
Citations JCR: 0 (25.10.2017.)
Date Deposited: 21 May 2015 11:57
Last Modified: 25 Oct 2017 09:30

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