LUHE-SILENCER develops simulation and optimization tools for the design of exhaust gas systems on ships

LUHE-SILENCER is working on the development and verification of improved simulation and optimization tools for the reduction of structure- and air-borne noise in association with Akustik Forschung Dresden and Fraunhofer IWU, as well as the associated partners MEYER WERFT, Flensburger Schiffbaugesellschaft, MAN Diesel & Turbo and DNV-GL. Within the framework of the cooperation, holistic, scalable SEA models are developed, verified and optimized to enable accurate predictions for the transmission of sound and vibrations in complex structural acoustic systems.
The newly developed calculation model is designed to reproduce measurement results with significantly greater precision than previous methods and thus increase the prediction accuracy of the acoustic effectiveness of silencer systems. From the outset, the project work has consistently placed great emphasis on practical relevance. In close collaboration with the associated partners, in particular the shipyards, geometries were designed for models and components in order to be able to characterize real plants in experimental setups. The acoustic and thermal output data of a large-volume diesel / gas engine were determined for a real project at the engine manufacturer’s test stand. A model silencer whose basic structure corresponds to the later original was acoustically measured and simulations performed with the newly developed analytical methods including structure-borne sound transmission.
With the measurement of the original silencer, it will be possible for the first time to assess whether the structure-borne sound mechanically transferred by the engine has a relevant influence on the total transmission loss compared to the emitted air-borne sound power.
In the course of the later project, measurements and tests will be carried out under real conditions on the completed vessel as well as a systematic review of the simulation results and model description.
The project is funded by the BMWi (Federal Ministry of Economics and Energy) under the program “Maritime next-generation technologies”. The Funding Institution is the PTJ (Project Management Jülich Research Center Jülich, Maritime Technologies).

LUHE-SILENCER develops simulation and optimization tools for the design of exhaust gas systems on ships