Superelement-based acceleration of finite-element simulations of wind turbine rotors

authored by: Florian Schleich, Zijian Chen, Matthis Graßmann, Claudio Balzani, Matthias Stammler
Abstract: Large numbers of wind turbine rotor finite-element simulations are required for blade bearing raceway and ring fatigue calculations. Finite-element rotor models come along with a complex nonlinear model behaviour and a high number of degrees of freedom due to the necessity of considering the blade bearing's surrounding structures. For that reason, accelerating such simulations is of particular interest for the iterative design process. This study focuses on different superelement configurations for the rotor model of the IWT 7.5-164 reference turbine. The blade bearing's resulting contact forces and contact angles are analysed for 18 load steps throughout an exemplary rotor rotation and the respective model results are compared to each other. The results show that implementing superelements in the rotor model significantly increases the computational efficiency with an acceptable loss of accuracy in terms of the blade bearing's internal loads. Furthermore, it is shown that such models outperform the acceleration and especially accuracy achieved by the usage of a one-third rotor model.
Organisation(s): Institute of Dynamics and Vibration Research
Institute of Wind Energy Systems
External Organisation(s): Fraunhofer Institute for Wind Energy Systems (IWES)
Type: Conference article
Journal: Journal of Physics: Conference Series
Volume: 2767
No. of pages: 10
ISSN: 1742-6588
Publication date: 2024
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Mechanical Engineering
Research Area (based on ÖFOS 2012): Mechanical engineering
Sustainable Development Goals: SDG 7 - Affordable and Clean Energy
Electronic version(s): https://doi.org/10.1088/1742-6596/2767/5/052029 (Access: Open)