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Fatigue assessment of amplitude-modulated non-stationary random vibration loading

  • Designing mechanical structures exposed to random vibration loading compromises the central challenges of defining comprehensive load assumptions and of processing these efficiently in a fatigue assessment. For this matter of statistical load description, frequency-domain methods withhold major advantages. They describe random vibration loading by its power spectral density, which allows drastic data reduction, to conduct efficient response analyses and to derive a statistical description of resulting load spectra. Nevertheless, this procedure is limited to stationary Gaussian loading. Thus, this paper proposes an extension of the frequency-domain approach to a special class of non-stationary loading – amplitude-modulated processes. These consist of a unique vibration state that varies in intensity, which is represented by a modulating signal. This paper develops a methodology to test for amplitude-modulated processes, to derive efficient measures for the intensity variation and to include this behavior in a fatigue assessment carried out in frequency-domain. The full methodology is presented via a set of simulated data.

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Metadaten
Author:Arvid TrappORCiD, Mafake James Makua, Peter WolfsteinerORCiD
URN:urn:nbn:de:bvb:m347-opus-2346
DOI:https://doi.org/10.1016/j.prostr.2019.08.050
Parent Title (English):Procedia Structural Integrity
Publisher:Elsevier B.V.
Document Type:Article
Language:English
Date of Publication (online):2022/01/11
Year of first Publication:2019
Publishing Institution:Hochschule für angewandte Wissenschaften München
Contributing Corporation:ICSI 2019 The 3rd International Conference on Structural Integrity
Release Date:2022/01/11
GND Keyword:MaterialermüdungGND; SonogrammGND
Page Number:8
First Page:379
Last Page:386
Note:
Sonderdruck aus: Procedia Structural Integrity 17(2019), S. 379–386
Departments and Institutes:Fakultäten der Hochschule München / FK 03 Fakultät für Maschinenbau, Fahrzeugtechnik, Flugzeugtechnik
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 60 Technik
Illustrations:grafische Darstellung/en
Licence (German):Creative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International
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