TraWinCopyright: © CWD
Acoustic transfer path analysis of wind turbines
The area potential for the utilization of new locations for wind turbines (WT) on land is strongly dependent on the distance to be maintained between the WT and residential building areas. In order to protect people from harmful noise effects, every WT or wind farm must comply with the immission guide values against noise.
Tonal noises are usually generated in the drive train in the form of structure-borne noise, especially in the gearbox and generator. The structure-borne sound propagates via several transfer paths within the structure to the sound radiation points, i.e. large, flat structures such as the tower, the outer shell and the rotor blades, from where it reaches the receiver as airborne sound. The possibility of a targeted reduction of the generation of structure-borne noise, the transfer and the emission of tonalities could significantly improve the perceived noise behaviour of wind turbines.
Within the framework of the research project "TraWin", a method is to be developed with which acoustic abnormalities can already be reliably predicted during the plant design. For this purpose the generation of structure-borne noise as well as the transfer to the radiation location shall be made predictable and the essential influencing variables shall be determined.
The work will be carried out in close cooperation with the companies Vestas and Flender, which on the one hand will provide simulation models of the transmission and the turbin, and on the other hand will provide the necessary field measurements for the project. The Chair for Wind Power Drives of the RWTH Aachen contributes extensive experience in the field of simulation as well as the acoustic behaviour of wind turbine drive trains.
01.01.2019 - 31.12.2021
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