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- W2068728097 abstract "Abstract The authors present a basic study of the acoustic Bragg diffraction patterns produced by gratings with various types of slits, which are insonified by (monochromatic) acoustic waves of various frequencies. Given the spacing in between the slits, the (Bragg) angular diffraction pattern generated by the grating can be predicted by the method of physical optics (acoustics), and can be numerically evaluated for gratings with either uniformly or irregularly spaced slits. It has been already established that the diffraction patterns of planar gratings can be used (i.e. Brill, D. & Gaunaurd, G. C., J. Acoust, Soc. Amer., 93 (1993) 71–79) to model the far-field scattering patterns produced by thin, cylindrical, elastic shells in water that have many reinforcing ribs. Varying the size and slit spacing (i.e. the ribs), the diffraction pattern becomes distorted, and for very irregularly spaced cases the distortion is substantially asymmetric and noticeable. In some instances it is also possible to relate the resulting diffraction pattern — which can be generated by computer for any conceivable configuration — to the grating size and the regular or irregular type of separations in between its slits. This serves to identify the type of grating that generated the pattern, a finding of importance in the area of underwater acoustic target recognition. A number of graphs are shown to illustrate these points." @default.
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- W2068728097 date "1995-01-01" @default.
- W2068728097 modified "2023-09-27" @default.
- W2068728097 title "Identification of cylindrical shells with sets of reinforcing ribs by their acoustic Bragg diffraction (grating) patterns" @default.
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- W2068728097 doi "https://doi.org/10.1016/0003-682x(94)00005-g" @default.
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