MITESD_77S10_pres04 (1)

MITESD_77S10_pres04 (1) - ESD.77 ESD.77 Multidisciplinary...

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Unformatted text preview: ESD.77 ESD.77 Multidisciplinary System Design Optimization Spring 2010 Barge Design Optimization Anonymous MIT Students ESD.77 What is a barge? Flat bottomed vessel, typically non self propelled, used to carry low value, heavy or bulky items. 2 ESD.77 Motivation Interest in marine environment disciplines. Opportunity to use and bring together previous academic experience. A common ship design problem would be extremely complex to handle in one semester. 3 ESD.77 Multi disciplinary Hydrostatics Hydrodynamics Structural Mechanics 4 Compressive stress in deck Tensile stress in keel Image by MIT OpenCourseWare. Ship Motion Degrees of Freedom Yaw Heave Sway Surge Pitch Roll Image by MIT OpenCourseWare. Z M B N K e G W W L WL" W L WL" Image by MIT OpenCourseWare. ESD.77 Problem Formulation Design Variables Lower Bound Upper Bound Unit L Length 90 140 m B Beam 20 35 m D Depth 4 9 m t Plate Thickness 12 28 mm Design Parameters Value Unit v Speed 10 knots kg Payload vertical center of gravity 1.2D lcg Payload longitudinal center of gravity 0.5L Peak spectral frequency 0.7 rad/sec H Significant wave height 2.5 m Sea water density 1025 kg/m 3 str Material thickness 7850 kg/m 3 Design Objective is to maximize payload (P) s.t....
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MITESD_77S10_pres04 (1) - ESD.77 ESD.77 Multidisciplinary...

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