Fifth International Congress on Sound and Vibration December 15-18, 1997 Adelaide, South Australia Power Flow Using Electro - Optic Holography, Part 1: Obtaining the Structural Phase
نویسندگان
چکیده
Electro-Optic Holography (EOH) is a laser based, fill field diagnostic technique used to measure micron sized deflections in statically displaced or vibrating structures. When applied to dynamically excited objects, EOH yields the time averaged displacement profile of the object surface. To obtain the structural power flow from EOH measurements, the structural phase must be extracted. This paper provides an overview of the EOH technique and describes a novel method successfi.dly used to obtain the vibrational phase from EOH measurements. Experimental results fkom a sinusoidally driven cantilever beam are presented in support of this new method.
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