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- W2051295697 abstract "Nearfield acoustic holography (NAH) is an indirect technique for identifying noise sources and visualizing acoustic field. Recently, several different methods, such as the spatial Fourier transform method, the boundary element method (BEM) and the Helmholtz equation-least squares (HELS) method, have been used to realize the NAH successfully. In the paper, a novel numerical method, the distributed source boundary point method (DSBPM), is proposed to realize the NAH. In the method, the transfer matrices from the reconstructed surface to the hologram surface are constructed indirectly by a set of particular solution sources located inside the vibrating structure, and their inverses are carried out by singular value decomposition (SVD) technique. Additionally, considering the high sensitivity of the reconstructed solution to measurement errors, the Tikhonov regularization method is implemented to stabilize the reconstruction procedure and the regularization parameter is determined by L-curve criterion. Compared with the BEM-based NAH, the variable interpolation, the numerical quadrature, and the treatments of singular integral and nonuniqueness of solution are all avoided in the proposed method. Two numerical examples and an experiment are investigated to validate the feasibility and correctness of the proposed method." @default.
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- W2051295697 date "2006-12-01" @default.
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- W2051295697 title "DISTRIBUTED SOURCE BOUNDARY POINT METHOD-BASED NEARFIELD ACOUSTIC HOLOGRAPHY FOR RECONSTRUCTING THE ACOUSTIC RADIATION FROM ARBITRARILY SHAPED OBJECTS" @default.
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- W2051295697 doi "https://doi.org/10.1142/s0218396x06003128" @default.
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