The student David Cubillas Álvarez obtained an OUTSTANDING qualification with 'CUM LAUDE' mention

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The student David Cubillas Álvarez obtained an OUTSTANDING qualification with 'CUM LAUDE' mention

THESIS

The student David Cubillas Álvarez obtained an OUTSTANDING qualification with 'CUM LAUDE' mention

2022·11·18

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Thesis title: Development of methodologies to analyse the performance of pitch bearing raceways under fretting wear damage

Court:

  • Chairmanship: Ibai Ulacia Garmendia (Mondragon Unibertsitatea)
  • Vocal: Diego Infante García (Universidad Politécnica de Valencia)
  • Vocal: Luis Ángel Bartolomé Marques (CIC energiGUNE)
  • Vocal: Mikel Abasolo Bilbao (UPV/EHU)
  • Secretary: Jon Larrañaga Amilibia (Mondragon Unibertsitatea)

Abstract:

The optimization of the designs and the advances in component manufacturing techniques have resulted in large wind turbines, and as a consequence standard component calculation methodologies are no longer applicable. In this thesis, the research focuses on the fretting phenomenon in the contact between the ball and the raceway of blade bearings. Following the objective of developing a methodology to analyze damage under operating conditions, formulations have been proposed and validated for the analysis of radial fretting, caused by variable loads, rotational fretting, caused by oscillating rolling movements, and mixed fretting, defined as the combination of both. Finally, the analysis of a case of study was performed.