Title page for ETD etd-12042009-020059

Type of Document Master's Thesis
Author Abel, Jeffry J.
URN etd-12042009-020059
Title Three-dimensional velocity extraction using laser Doppler vibrometry
Degree Master of Science
Department Mechanical Engineering
Advisory Committee
Advisor Name Title
Mitchell, Larry D. Committee Chair
West, Robert L. Jr. Committee Member
Wicks, Alfred L. Committee Member
  • Speed
Date of Defense 1993-02-03
Availability restricted

In the analysis of plates and beams, in-plane velocities have been assumed to be small and negligible. This was nearly an unavoidable assumption due to the fact that the in-plane velocity was near impossible to determine accurately with conventional techniques. This assumption needs to be checked experimentally. In addition, general engineering structures, such as machines, TV towers, buildings, etc., have major in-plane motions that are actually out-of-plane motions as viewed from another vantage point. These also need to be measured. Now with the use of a Laser Doppler Vibrometer the development of a method to measure three-dimensional velocities has provided the ability to measure inplane velocities accurately. This thesis outlines the methods used for such threedimensional extraction and gives an example of its use.

Not only is the final three-dimensional method described, but the whole process of developing the method is outlined. This will hopefully provide insight into the difficulties associated with this method as well as prevent other researchers from following similar fruitless approaches.

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