@article {Zhou:2017:1354-2575:189,
title = "Improving the reliability of industrial multi-MW wind turbines",
journal = "Insight - Non-Destructive Testing and Condition Monitoring",
parent_itemid = "infobike://bindt/insight",
publishercode ="bindt",
year = "2017",
volume = "59",
number = "4",
publication date ="2017-04-01T00:00:00",
pages = "189-195",
itemtype = "ARTICLE",
issn = "1354-2575",
url = "https://www.ingentaconnect.com/content/bindt/insight/2017/00000059/00000004/art00005",
doi = "doi:10.1784/insi.2017.59.4.189",
keyword = "WIND TURBINES, GEARBOX, CONDITION MONITORING, FEA, ACOUSTIC EMISSION",
author = "Zhou, J and Roshanmanesh, S and Hayati, F and Junior, V Jantara and Wang, T and Hajiabady, S and Li, X Y and Basoalto, H and Dong, H and Papaelias, M",
abstract = "Although wind turbine gearboxes are designed to remain in service for 20-25 years, this is not normally the case due to defects initiating and developing prematurely. A large number of gearboxes fail after seven to eight years in service. In offshore wind farms, gearbox failures have
been reported after only one to two years in service, leading to noteworthy production losses. Reliability issues associated with wind turbine gearboxes are yet to be resolved. Within this paper, the quality of materials used for manufacturing wind turbine gearbox gears and bearings has been
evaluated. The damage mechanisms affecting gearbox materials have been investigated based on metallographic analysis carried out on failed samples removed from in-service industrial wind turbines. Finite element analysis (FEA) has been carried out in order to simulate damage initiation and
propagation under in-service conditions. The results have been compared with the experimental observations made on the failed field samples and have been found to be in good agreement. The applicability of acoustic emission in detecting and identifying defects in different wind turbine gearbox
components remotely has been assessed following measurements in the field.",
}