20.500.12556/RUL-113726 Harmonic equivalence of the impulse loads in vibration fatigue Ekvivalenca harmonskih in impulznih obremenitev v vibracijskem utrujanju 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. vibration fatigue random loads spectral methods fatigue life stationary loading non-stationary loading non-Gaussian loading vibration testing vibracijsko utrujanje naključne obremenitve spektralne metode utrujanje materiala stacionarne obremenitve ne-stacionarne obremenitve true false true Angleški jezik Slovenski jezik Članek v reviji 2020-01-29 13:35:02 2020-01-29 13:35:06 2022-08-26 03:47:11 0000-00-00 00:00:00 2019 0 0 Str. 631-640 no. 11/12 Vol. 65 Nov./Dec. 2019 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 531:620.178.3(045) 0039-2480 10.5545/sv-jme.2019.6197 16942107 762116 RAZ_Ogrinec_Primoz_2019.pdf RAZ_Ogrinec_Primoz_2019.pdf 1 A1923181359F71C3AB88EAFE91CEC449 f54c971b8b1c4f44e0018261b9b1c018a7796501ef160a077b809cccfcc15b7a 2551cc60-a1b8-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=125824 https://www.sv-jme.eu/sl/article/harmonic-equivalence-of-the-impulse-loads-in-vibration-fatigue/ 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=125823 Fakulteta za strojništvo 0 0 0