Vibration analysis and nondestructive testing using holographic techniques.
Hoffmann, Phillip P.
Fuhs, Allen E.
MetadataShow full item record
Real-time holograms were made of Aluminum rectangular plates. The plates were cyclically vibrated with a piezoelectric driver to allow the fundamental frequencies to be measured and the mode shapes observed. These results were compared with theoretical frequency calculations. The plates were flawed by three different methods, and real-time holograms were again made. The resonant frequencies of each plate were recorded, and each mode shape was observed. A comparison between the plates before and after the flaws was made to determine the applicability of holography to the nondestructive testing of vibrating objects. Results indicate that holographic nondestructive testing (HNDT) of vibrating objects shows great promise for future applications.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Naval Postgraduate School Physics (2013);The Casimir Effect: The demonstration shows that traveling water waves carry momentum. Here is a container of liquid. It is ethyl alcohol with the dye flourescein so that the waves can be seen. Water works, too, but alcohol ...
Tait, Nicole Lynn (Monterey, California. Naval Postgraduate School, 1995-12);High speed oscillatory flows, like high speed mean flows, are capable of inducing time-averaged heat transfer effects. This research involves the analytical solution of a model problem of zero-mean internal oscillatory ...
The use of computer intensive statistical modeling in estimating the variability of marine fouling communities. Martin, David L. (Monterey, California. Naval Postgraduate School, 1983-06);The variability of the fouling community in Monterey Bay was investigated by suspending 100 mild steel plates in Monterey Harbor. The plates were painted with either a nontoxic control paint or one of three antifouling ...