Simulation von elektromagnetisch angeregtem Körperschall in getriebelosen Windenergieanlagen

• Simulation of electromagnetically excited structure-borne noise in gearless wind turbines

Duda, Tobias Philipp Roman; Jacobs, Georg (Thesis advisor); Hameyer, Kay (Thesis advisor)

Aachen : RWTH Aachen University (2022, 2023)
Dissertation / PhD Thesis

Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2022

Abstract

The permissible noise emission is a significant hurdle for the construction of new onshore wind power plants. Therefore, the noise emission of new wind turbines must be reduced in order to enable a higher area density for electricity production from wind energy. An important part of the interference noise of wind power plants is the tonal machine noise of the generator. To improve the sound behavior of future turbines, predictive calculation models must be available in order to derive optimization approaches. The relevant influencing factors for the electromagnetic excitation forces of the generator as a source of structure-borne noise have not yet been sufficiently investigated. Therefore, the aim of this study is to evaluate the influencing factors of the electromagnetic structure-borne sound excitations in the air gap of the generator and to develop a simulation model with which the electromagnetically excited structure-borne sound in gearless wind turbines can be calculated with sufficient accuracy. Accordingly, the developed simulation methodology is presented and the sensitivity of the generator's oscillations to the influencing factors is analyzed. The investigated influencing factors include the thermal expansion of the generator components, the electrical sheet geometry and the deformation of the air gap environment by electromagnetic as well as aerodynamic loads.In addition to the influencing factors, the abstraction losses of the model are also investigated and recommendations for the modeling are derived.

Institutions

• Chair and Institute for Machine Elements and Systems Engineering [411710]