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Evaluation of displacements by means of 3D laser scanning in a mechanically loaded replica of a hull section of the Vasa ship
Division of Appplied Mechanics, Uppsala University, Box 534, SE-751 21, Uppsala, Sweden.
École Nationale Supérieure de Mécanique et des Microtechniques, 26 Rue de l'Épitaphe, 25000 Besançon, France.
Division of Appplied Mechanics, Uppsala University, Box 534, SE-751 21, Uppsala, Sweden.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering. (Wood science and technology)ORCID iD: 0000-0001-8404-7356
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2018 (English)In: Digital Applications in Archaeology and Cultural Heritage, ISSN 2212-0548, Vol. 11, article id e00085Article in journal (Refereed) Published
Abstract [en]

For a development of full-scale finite-element models of large objects in cultural heritage, it can be useful to mechanically test replicas of key parts to identify structural properties which would otherwise not be available. This paper presents full scale tests on a replica of a section of the hull of the 17th century warship Vasa in three load configurations. We focus on determining a displacement of the loaded replica from 3D laser measurements. Two measures were found useful: (i) 3D displacements at well-defined intersections of the wooden replica, and (ii) normal displacements of larger surfaces. Wood surfaces were preferred to steel parts of the rig since the latter showed more scatter in displacement values in their point clouds caused by their reflective properties. The measurements were verified with draw-wire sensors. Some of these sensors were attached to the steel rig supporting the replica and, therefore, measured relative displacements. The scanning data was also useful to quantify the absolute movement of the steel rig supporting the replica, which improved the precision of the measurements of replica deformation. Finally, it is discussed how the replica test results can be used in a model of the entire museum ship.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 11, article id e00085
Keywords [en]
3D laser scanning, Structural analysis, Vasa, Wood, Shear
National Category
Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-71806DOI: 10.1016/j.daach.2018.e00085Scopus ID: 2-s2.0-85057593098OAI: oai:DiVA.org:ltu-71806DiVA, id: diva2:1266687
Funder
Swedish Research Council for Environment, Agricultural Sciences and Spatial PlanningSwedish Research Council FormasVinnovaAvailable from: 2018-11-29 Created: 2018-11-29 Last updated: 2019-09-13Bibliographically approved

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Hagman, Olle

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