Visualization techniques for representing scalar velocity fields over one- and two dimensional
vibrating structures are investigated. High spatial density velocity fields are
measured over a vibrating beam and a vibrating plate by a scanning laser velocimeter.
The velocity measurements are assumed to contain noise.
This thesis proposes a model on which principles and goals of scientific
visualization are applied to experimental structural dynamics. Various mathematical
functions and parameter estimation techniques are studied to obtain suitable
mathematical models for fitting the scattered data sets. A two window displaying
method, including a main display window and a zoom window, is adopted for visualizing
the two-dimensional velocity data. To visualize three-dimensional velocity fields, four
representation methods, the illuminated shade surface, the wireframe surface, the color
contour surface, and the three-dimensional vector representation are demonstrated to
visualize velocity fields. A dynamic animation of the plate's dynamic response is also
demonstrated.
Results demonstrate the feasibility of using visualization techniques to manipulate
complicated scalar velocity data and visualizes the dynamic response of the free-free
beam and completely free rectangular plate vibrations.
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