Wave Based Modeling Methods for Acoustic Inclusion and Multiple Scattering Problems in the Mid-Frequency Range (Golfgebaseerde modelleringsmethodes voor akoestische problemen met inclusies en meerdere verstrooiers in het middenfrequente gebied)
Wave Based Modeling Methods for Acoustic Inclusion and Multiple Scattering Problems in the Mid-Frequency Range
The tightening of legal regulations on the human exposure to noise and vibrations and the everincreasingcustomer demands for better comfort force product designers to take the dynamic andacoustic properties of their products into account throughout the entire design process. In the classicaldesign process these properties are studied by means of extensive measurement campaigns carried outon physical prototypes. This approach is not only time-consuming but also very expensive, resulting insevere limitations on the number of design possibilities which can be fully explored. In order to reducethe number of physical prototypes and to shorten the product design cycle, a vast amount of effort is putinto the development of Computer Aided Engineering (CAE) techniques.Over the last decade, a Wave Based Method (WBM) has been developed at the K.U.Leuven for theefficient numerical analysis of the noise and vibration properties of products, in the low, but specificallyin the mid-frequency range. The theoretical feasibility of the WBM has been proven in previous researchby means of various academic case studies.The goal of the proposed research is to extend of the wave modelling concept towards application onindustrially sized problems, such as vehicle body-noise-transfer-function predictions and engine radiationanalysis. To this end, a hybrid approach will be adopted, in which WB models will be coupled with otherelement based models (such as Finite Element models) to master both the mid-frequency issues and thegeometrical complexity of the problems under investigation. The numerical models will be validated bymeans of dedicated experimental measurement campaigns.