Accession Number : ADA262675


Title :   Reduction of Plate Vibration and Acoustic Radiation via Adaptively Controlled Boundaries


Descriptive Note : Technical rept.


Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK APPLIED RESEARCH LAB


Personal Author(s) : Gruenhagen, D A ; Burroughs, C B ; Sommerfeldt, S D


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a262675.pdf


Report Date : Apr 1993


Pagination or Media Count : 45


Abstract : Reduction of plate vibration and acoustic radiation at low frequencies via adaptively controlled boundaries is experimentally demonstrated. The control is based on changing the clamping pressure at the boundaries of the plate to continuously detune the plate resonance frequencies from the frequency of pure-tone excitation. Results are presented for the control plate vibration with single and varying frequencies of excitation and for the control of acoustic radiation with single frequency excitation.... Plate Vibration, Acoustic Radiation, Adaptive Control, Boundaries, Clamping pressure.


Descriptors :   *VIBRATION , *ACOUSTIC WAVES , *DAMPING , *NOISE REDUCTION , *ACOUSTIC ATTENUATION , FREQUENCY , CONTROL , REDUCTION , PLATES , RESONANCE , ACOUSTICS , ACOUSTIC RESONANCE , LOW FREQUENCIES , CLAMPS , PRESSURE , STRUCTURAL RESPONSE , BOUNDARIES , THESES , EXCITATION , ADAPTIVE CONTROL SYSTEMS , RADIATION


Subject Categories : Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE