Browsing NTNU Open by Author "Rezaei, Ashkan"
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Comparative analysis of rolling contact fatigue life in a wind turbine pitch bearing with different modeling approaches
Rezaei, Ashkan; Schleich, Florian; Menck, Oliver; Grassmann, Matthis; Bartschat, Arne; Nejad, Amir R. (Journal article; Peer reviewed, 2024)The load calculation for wind turbines usually does not take pitch bearings into account, and the pitch-bearing internal load distribution is calculated in a decoupled process. In the current study, a coupled wind turbine ... -
Effect of wind speed distribution and site assessment on pitch bearing loads and life
Rezaei, Ashkan; Nejad, Amir R. (Peer reviewed; Journal article, 2023)In this paper, the wind speed distribution at thirteen onshore and offshore wind sites has been studied. Different probability distributions are used to estimate the wind speed distribution. Several goodness-of-fit indicators ... -
Effects of wind field characteristics on pitch bearing reliability: a case study of 5 MW reference wind turbine at onshore and offshore sites
Rezaei, Ashkan; Guo, Yi; Keller, Jonathan; Nejad, Amir R. (Peer reviewed; Journal article, 2023)This paper presents a study on pitch bearing basic rating life affected by wind field characteristics at both onshore and offshore wind sites. The National Renewable Energy Laboratory 5 MW reference wind turbine is selected ...