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A study of the coupling between test data accuracy and life prediction
Linnaeus University, Faculty of Technology, Department of Mechanical Engineering. (Maskinteknik)ORCID iD: 0000-0002-4404-5708
Linnaeus University, Faculty of Technology, Department of Mechanical Engineering. (Maskinteknik)
University of Southern Denmark, Denmark. (Technology and Innovation)
University of Southern Denmark, Denmark. (Technology and Innovation)ORCID iD: 0000-0003-2025-7842
2014 (English)In: Proceedings of ISMA2014 including USD2014: 26th International Conference on Noise and Vibration Engineering and 5th International Conference on Uncertainty in Structural Dynamics, 15-17 September 2014, Leuven, Belgium / [ed] P. Sas, H. Denayer & D. Moens, Leuven: Katholieke Universiteit Leuven, Department of Mechanical Engineering , 2014, p. 415-428Conference paper, Published paper (Other academic)
Abstract [en]

Computational models are regularly used to predict responses and the life of structures. Often, the computational models are validated by use of data stemming from vibration testing. However, the damping values are almost always taken from test alone and hence cannot be validated. Experimentally obtained damping values are well known to have relatively high uncertainties. In the present paper we investigate how life time predictions are affected by modal damping uncertainties by simulating responses due to random loads. The simulations are based on experimental modal analysis results of a structure consisting of two steel plates which are joined by bolts, tested under several different experimental support conditions. The results illustrate the importance of careful consideration of experimental test setups, as these can strongly affect the obtained damping estimates. This, in turn, can lead to large differences in predicted life time.

Place, publisher, year, edition, pages
Leuven: Katholieke Universiteit Leuven, Department of Mechanical Engineering , 2014. p. 415-428
Keywords [en]
damping, modal, testing, fatigue
National Category
Applied Mechanics
Research subject
Technology (byts ev till Engineering), Mechanical Engineering
Identifiers
URN: urn:nbn:se:lnu:diva-37088ISI: 000352201000033Scopus ID: 2-s2.0-84913525255ISBN: 9781634395069 (print)OAI: oai:DiVA.org:lnu-37088DiVA, id: diva2:748002
Conference
26th International Conference on Noise and Vibration Engineering, ISMA 2014, Leuven, Belgium, September 15-17, 2014
Available from: 2014-09-17 Created: 2014-09-17 Last updated: 2016-12-13Bibliographically approved

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Linderholt, AndreasChen, YoushengBrandt, Anders

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Output format
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