The onshore wind turbine industry must overcome many technical, commercial, and environmental difficulties. A significant element for planning consent is operational noise. Acoustic limits are strictly enforced and can lead to near-neighbour complaints as well as contractual disputes. Reactec have diagnosed, analyzed and solved a problematic tonal resonance using ANSYS 12.1. This paper presents the measurement, analysis, modelling and solution simulation process when tackling a tonal noise issue in a megawatt scale wind turbine. Extensive modelling and simulation of the entire turbine system allows an in-depth diagnosis as well as a virtual test bed for solution design. The analysis reveals a complex interaction between gearbox resonances, mounting system performance, and tower design. A mitigation measure is developed and simulated in order to provide sufficient tonal reduction.
Badrinath, CH. V. N. and Chakravarthy, P. Kranthi
"Modeling and Analysis of Acoustic Emissions and Structural Vibration in a Wind Turbine,"
International Journal of Applied Research in Mechanical Engineering: Vol. 1:
3, Article 14.
Available at: https://www.interscience.in/ijarme/vol1/iss3/14