A reliability analysis method based on the mixed correlated competition model considering multi-performance degradation and sudden failures

Pan, Guangze; Guo, Guang-Qin; Li, Dan; Li, Yaqiu; Li, Qian; Liu, Wenwei

doi:10.1016/j.engfailanal.2023.107126

Cited by 8 publications

(1 citation statement)

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“…Competitive failure has always been a hot topic in reliability research. Zhu et al [21,22] evaluated a system's reliability by studying the competitive process of sudden failure caused by random impact and degradation failure caused by the degradation process, considering the impact on degradation trajectory and degradation rate. Zhao et al [23] described the degradation process of a low-voltage switchgear through the Wiener process, simulated sudden failure through exponential distribution, and described different failure situations through the ratio of median life of degradation failure to accidental failure to evaluate the reliability of a low-voltage switchgear.…”

Section: Introductionmentioning

confidence: 99%

Method for Evaluating the Reliability and Competitive Failure of Wind Turbine Gearbox Bearings Considering the Fault Incubation Point

et al. 2023

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Aiming to resolve the problem where the reliability of gearbox bearings of wind turbines is easily affected by random impact, this paper puts forward a reliability evaluation method for the competitive failure of gearbox bearings of wind turbines considering the fault incubation point. Firstly, we use Weibull distribution to simulate the fault latent process of wind turbine gearbox bearings. Secondly, a natural degradation model of gearbox bearing is established based on the Wiener process. Then, we model the random impact arrival frequency and impact intensity through a homogeneous Poisson process and normal distribution, respectively. Finally, based on considering the fault incubation point, the natural degradation of the bearing, the instantaneous degradation caused by impact, and the decline in the impact resistance of the bearing, a reliability evaluation model of gearbox bearings of wind turbines is established. A high-speed bearing of a gearbox from a wind farm in northern China is selected for simulation analysis. The results show that the proposed method can better describe the reliability decline process of the gearbox bearings of wind turbines, which has a specific guiding significance for the maintenance of wind turbines.

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Section: Introductionmentioning

confidence: 99%