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Design of a virtual acoustic sensor for estimating the radiated sound of cylindrical shells
A. Loghmani,M. Danesh,M.K. Kwak,M. Keshmiri 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.10
In this paper, a virtual acoustic sensor is designed and evaluated experimentally to be used instead of microphones in active noise control of vibrating cylindrical shells. Dynamic motion equations of a cylindrical shell along with the effect of bonded piezoelectric patches are derived based on the Hamilton’s principle and Rayleigh-Ritz method. The Sanders shell theory is used to relate the strains to the displacements of the cylinder. Modal structural acoustic sensing technique estimates the far-field radiated sound pressure of the cylinder. Experimental frequency response function (FRF) of the actual microphone at various locations are obtained and compared to that of the virtual one. The theoretical estimated sound pressure is in good agreement with the experimental results.