Modeling and Approximation of a Coupled 3-D Structural Acoustics Problem
A growing area of research in the structural acoustics community concerns the problem of reducing structure-borne noise levels within an acoustic cavity. A specific example of this is motivated by the development of a new class of turboprob and turbofan engines which are very fuel efficient but also very noisy. The low frequency high amplitude acoustic fields produced by these engines cause vibrations in the fuselage which in turn generate unwanted interior noise. The passive control techniques which were initially considered were in general undesirable since the increased weight offset the advantages gained through the use of the new engines and lighter airframe materials. This then led to the study of active control techniques for this problem both in a frequency domain setting and from a time domain approach (PDE approach).
KeywordsCircular Plate Stability Margin Interior Noise Acoustics Problem Infinite Dimensional System
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