000021637 001__ 21637
000021637 005__ 20170622131257.0
000021637 04107 $$aeng
000021637 046__ $$k2017-06-15
000021637 100__ $$aFirus, Andrei
000021637 24500 $$aMICROWAVE INTERFEROMETRY MEASUREMENTS FOR RAILWAY-SPECIFIC APPLICATIONS

000021637 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021637 260__ $$bNational Technical University of Athens, 2017
000021637 506__ $$arestricted
000021637 520__ $$2eng$$aThe microwave interferometry is a rather new measurement method, whose functioning principle allows the non-contact synchronous acquisition of structural displacements for several points along a structure, with accuracy in sub-millimetre range at a sampling rate of up to 4 kHz. Due to the high sampling rate, the acquisition of dynamic responses is also possible. Hence, main modal structural parameters such as natural frequencies and damping ratios can be straightforwardly identified. Furthermore, the synchronous measurement of several points along the targeted object, achieved due to a range resolution of about 0.75 m, may allow the direct determination of modal shapes. Under consideration of its novel character and a lack of previous experience with respect to railway-specific tasks, the measurement method had to be subjected to a systematic and comprehensive validation process prior to a reliable implementation in everyday practice. The validation process included several parallel measurements and comparisons with conventional measurement techniques. Besides the direct verification of the quality of the results, it was used as well for defining boundary conditions and limitations of the measurement method with respect to railway-specific applications. As a result, an evaluation matrix was created, which illustrates the applicability of the microwave interferometry for different types of structures. This paper gives a brief introduction of the microwave interferometry and presents some aspects and selected results of the validation process, which was performed within a cooperation project between the TU Darmstadt (Germany) and the German Railways (Deutsche Bahn AG). 1

000021637 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021637 653__ $$amicrowave interferometry, dynamic measurements, railway bridge dynamics

000021637 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021637 720__ $$aFirus, Andrei$$iGrunert, Günther$$iPullamthara, Jiny Jose$$iBecker, Matthias$$iSchneider, Jens
000021637 8560_ $$ffischerc@itam.cas.cz
000021637 8564_ $$s4439172$$uhttps://invenio.itam.cas.cz/record/21637/files/17334.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS28] New experimental techniques for structural identification and health monitoring
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000021637 962__ $$r21500
000021637 980__ $$aPAPER