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Durham e-Theses
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Use of Graded Laser Scanning to Generate Efficient Boundary Element Meshes

YANG, BINGRU (2011) Use of Graded Laser Scanning to Generate Efficient Boundary Element Meshes. Masters thesis, Durham University.

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Abstract

This thesis presents an approach which combines a reverse engineering technique with boundary element stress analysis, by generating a graded mesh to improve the simulation efficiency. A rectangular metal plate, a bar of a circular cross section, a gas turbine blade and a steam turbine blade were scanned at different resolutions using a (non-contact) laser scanner measurement to obtain the point clouds. Meshes of each object were generated in Rapidform and directly used in a boundary element stress analysis. In addition, the steam turbine blade was scanned using different scanning resolutions. From this, a graded mesh model of the blade was generated and then efficient boundary element stress analyses were performed. An application of a freeform surface reconstruction of a blade surface is also given. Also, several Matlab programs were written to repair the edges and the cylindrical surface of the meshes.

Item Type:Thesis (Masters)
Award:Master of Science
Keywords:reverse engineering, laser scanning, freeform surface reconstruction, graded mesh generation, boundary element stress analysis, RE and BEM integration.
Faculty and Department:Faculty of Science > Engineering and Computing Science, School of
Thesis Date:2011
Copyright:Copyright of this thesis is held by the author
Deposited On:07 Jun 2011 10:20

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