20.500.12556/RUL-163915 Kurtosis control of amplitude-modulated non-gaussian signals for fatigue test Nadzor sploščenosti amplitudno moduliranega negaussovega signala za namene utrujenostnih preizkusov The amplitude modulation method was used to generate non-Gaussian signals that acted as excitation for fatigue tests. The fatigue life of structures under non-Gaussian excitation has been proven to be closely related to the features of the amplitude modulation signal (AMS) and kurtosis of the structural response. In this study, the modelling of the AMS by Beta and Weibull distributions and the resulting kurtosis range problem is first reviewed. To solve this problem, a new method for creating an AMS based on a linear combination of Beta and Weibull distributions is proposed. To ensure that the high kurtosis of the amplitude-modulated non-Gaussian signal is correctly transferred to the structural response, the method is further developed to fulfil the specifications for the fatigue damage spectrum (FDS) by controlling the spectral content of the AMS. Herein, a Gaussian AMS with a low-pass cutoff frequency is first generated and then converted to a Weibull or Beta AMS based on the cumulative distribution function (CDF) transformation. The proposed method is verified using simulated and field-measured data. The results show that the full range of specified kurtosis is achieved with the new AMS modelling method. The high kurtosis of the non-Gaussian input signal can be transferred to the linear system response if the mean value of AMS during the period of the system impulse response is the same as AMS. non-Gaussian signals amplitude modulation method fatigue damage spectrum kurtosis negaussovi signali metoda linearne kombinacije metoda amplitudne modulacije mejna frekvenca spekter utrujenostnih poškodb sploščenost true false true Angleški jezik Slovenski jezik Članek v reviji 2024-10-14 10:31:11 2024-10-14 10:31:16 2024-10-16 03:25:25 0000-00-00 00:00:00 2024 0 0 Str. 440-451 no. 9/10 Vol. 70 Sept.-Oct. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.3:620.1 0039-2480 10.5545/sv-jme.2023.908 211374595 Kurtosis_Control_of_Amplitude-Modulated_....pdf Kurtosis_Control_of_Amplitude-Modulated_....pdf 1 6A9385E8900DE1A39E5E45A2FC3D6409 3dcb5ecdba7eddaf10bae62f3e177b58d7870cd46ac8205208ae89539bdea781 a44eb23a-8a06-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=193896 https://www.sv-jme.eu/sl/article/kurtosis-control-of-amplitude-modulated-non-gaussian-signal-for-fatigue-test-purpose/ 1 7632a142-8a06-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=193895 Fakulteta za strojništvo Strojniški vestnik 0 0 0