Abstract
This work is concerned with the study of severity and location of a transverse crack in a wood beam. There exist several ways of solving this problem, including both analytical and numerical approaches. However, this study takes into consideration simple, but efficient analytical approaches to study the case of a simply supported beam subject to a crack. The investigation concerns monitoring the variation of eigenfrequencies with crack depth for the few lowest modes of vibration, and vibrations both in the longitudinal and the bending modes are taken into consideration. Experimental results are also reported for supporting the theoretical predictions.
Zusammenfassung
Diese Untersuchung betrifft das Ausmaß und die Lokalisation eines transversalen Risses in einem Holzbalken. Mehrere Methoden, sowohl analytische als auch numerische Ansätze, existieren, um dieses Problem zu lösen. In dieser Arbeit kommen einfache, aber effiziente Methoden zum Einsatz, um im Fall eines einfach unterstützten Balkens die Rissbildung zu untersuchen. Dabei wird die Variation der Eigenfrequenzen mit der Risstiefe für die niedrigsten Schwingungszustände verfolgt. Berücksichtigt werden dabei die Schwingungen sowohl in longitudinaler als auch in Biegerichtung. Experimentelle Egebnisse, die die theoretischen Vorhersagen bestätigen, werden ebenfalls mitgeteilt.
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Ouis, D. Assessment of severity and localisation of a transversal crack in a wood beam through a study of its natural modes of vibration. Holz Roh Werkst 62, 17–22 (2004). https://doi.org/10.1007/s00107-003-0442-1
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DOI: https://doi.org/10.1007/s00107-003-0442-1