@Article{sv.2018.03637,
AUTHOR = {Brian Schwarz, Patrick McHargue, Mark Richardson},
TITLE = {ODS \& Modal Testing Using a Transmissi- bility Chain},
JOURNAL = {Sound \& Vibration},
VOLUME = {52},
YEAR = {2018},
NUMBER = {2},
PAGES = {1--6},
URL = {http://www.techscience.com/sv/v52n2/33761},
ISSN = {2693-1443},
ABSTRACT = {In this paper, we show how Operating Deflection Shapes (ODS’s) and mode shapes can be obtained experimentally from measurements that are made using <i>only two sensors</i> and <i>two short wires</i> to connect them to a multi-channel acquisition system. This new test procedure is depicted in Figure 1. Not only is the equipment required to do a test much more cost effective, but this method can be used to test <i>any sized test article</i>, especially large ones.<br/>

The testing method introduced here involves moving a pair of sensors along together in a prescribed manor, and calculating the Transmissibility between them. The resulting chain of Transmissibility’s is then postprocessed to obtain a <i>single reference set</i> of cross-channel measurements, from which ODS’s and mode shapes can be extracted.<br/>

A <i>“round trip”</i> example is used to show how an original set of modal parameters can be recovered by curve fitting a <i>single reference set</i> of output-only Cross spectra, and a <i>single reference set</i> of FRFs.},
DOI = {10.32604/sv.2018.03637}
}