Primož Ogrinec (Avtor), Janko Slavič (Avtor), Miha Boltežar (Avtor)

Povzetek

In vibration fatigue, three unique types of loads are typical: random, harmonic and impulse. In an application any of these loads are possible. A fatigue-life analysis is possible in the time and frequency domains using the frequency-response function of a structure. Recent studies demonstrated that the impulse loads influence the accuracy of a fatigue-life prediction in the frequency domain. The focus of this research is a theoretical study of an equivalent harmonic load to the impulse load on a single-degree-of-freedom system in order to investigate the feasibility of impulse loads in vibration testing. This research shows that there is a relationship between the impulse and harmonic loads that is related to the underlying dynamic properties (e.g., damping, natural frequency). Based on a theoretical analysis an experimental procedure was developed for both cases of excitation, which was able to confirm the theoretical analysis. Using the modal decomposition the single-degree-of-freedom approach can be generalized to multiple-degrees-of-freedom systems.

Ključne besede

vibration fatigue;random loads;spectral methods;fatigue life;stationary loading;non-stationary loading;non-Gaussian loading;vibration testing;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 531:620.178.3(045)
COBISS: 16942107 Povezava se bo odprla v novem oknu
ISSN: 0039-2480
Matična publikacija: Strojniški vestnik
Št. ogledov: 479
Št. prenosov: 356
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarni naslov: Ekvivalenca harmonskih in impulznih obremenitev v vibracijskem utrujanju
Sekundarne ključne besede: vibracijsko utrujanje;naključne obremenitve;spektralne metode;utrujanje materiala;stacionarne obremenitve;ne-stacionarne obremenitve;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 631-640, SI 82
Letnik: ǂVol. ǂ65
Zvezek: ǂno. ǂ11/12
Čas izdaje: Nov.-Dec. 2019
DOI: 10.5545/sv-jme.2019.6197
ID: 11392455