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Weight optimization of large scale sandwich structures with acoustic and mechanical constraints
KTH, Superseded Departments, Aeronautical and Vehicle Engineering.ORCID iD: 0000-0003-0198-6660
2003 (English)In: Journal of Sandwich Structures and Materials, ISSN 1099-6362, E-ISSN 1530-7972, Vol. 5, no 3, 253-266 p.Article in journal (Refereed) Published
Abstract [en]

A generic model of it railway car body in sandwich design was weight optimized subject to various constraints. These constraints were global natural frequency constraints. buckling and wrinkling constraints, and sound reduction constraints. A finite element model was used for global analysis. while sandwich plate theory was used for local structural analyses. The acoustic model for sound reduction was a sandwich plate model. The optimization procedure started with an infeasible initial design and produced it final design which fulfilled all requirements. yet had a reduced weight. The optimization wits performed with and without acoustic constraints and the results imply that the acoustic requirements will produce a heavier design than when the optimization is performed with mechanical constraints only.

Place, publisher, year, edition, pages
2003. Vol. 5, no 3, 253-266 p.
URN: urn:nbn:se:kth:diva-22665DOI: 10.1177/109963603027910ISI: 000184083700003OAI: diva2:341363
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Wennhage, Per
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