LeiQaS

The LeiQaS project combined various innovative approaches to reduce TTS noise, including optimized propeller designs, measures to minimize cavitation, and active vibration reduction. These aspects were addressed by a consortium of experts in fluid dynamics, propeller development, and structural dynamics. A key component was Wölfel Engineering's subproject, which focused on active vibration reduction to mitigate structure-borne noise and reduce its impact on the ship itself.

Within the subproject, Wölfel developed a unit for active vibration isolation and reduction capable of targeting vibrations caused by propeller blade passages. Comprehensive structural dynamic analyses using finite element methods (FEM) and multi-body simulations (MBS) were performed to model the system's dynamic properties and identify optimal vibration reduction parameters.

The developed models and algorithms were validated through experimental tests under realistic conditions during large-scale trials. These trials demonstrated that the active absorber unit achieved significant vibration reductions in TTS through precise actuator control, achieving horizontal vibration level reductions of up to 10 dB. These successes underscore the effectiveness of the developed technology and its potential application on modern ships.

Upon project completion, Wölfel Engineering presented a significant innovation in noise control that could be integrated into market-ready systems to meet the demands for low-noise and environmentally friendly ship propulsion.