Date of Award


Publication Type

Master Thesis

Degree Name



Mechanical, Automotive, and Materials Engineering


Engineering, Mechanical.


North, W. P. T.,




This research explores extending D Sight use on steady-state dynamic (vibrating) surfaces. The objectives of the research were: to determine if D Sight can be used to determine the mode shapes and location of nodes in a steady-state vibrating surface; to study the effect of varying the angle of incidence and determine an optimum angle; to correlate these results with finite element vibration analysis; and to determine if this method can be applied to the problem of locating subsurface debonds. It was found that as the angle of incidence increased the contrast of the image increased. A small angle of incidence was found to be optimum for a polished surface. The finite element vibration modeling found many mode shapes but seemed to miss some that were very evident in the experimental work. Otherwise there was a fair correlation between the mode shapes that were found in both. To look for debonds, a cross-brace was fastened to the back of a brass plate. Dynamic D Sight enhanced the image of the debonds although the debonds were visible even in the static D Sight images. In another case a point contact was fastened to the back of the plate. Again it was visible in the static view but in the Dynamic D Sight image it could be observed how the point contact affected the mode shapes of the vibrating plate. (Abstract shortened by UMI.)Dept. of Mechanical, Automotive, and Materials Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1993 .A955. Source: Masters Abstracts International, Volume: 32-02, page: 0702. Adviser: W. P. T. North. Thesis (M.A.Sc.)--University of Windsor (Canada), 1993.