The Effects Of Large Vibration Amplitudes On The Mode Shapes And Natural Frequencies Of Thin Elastic Structures, Part III: Fully Clamped Rectangular Isotropic Plates—Measurements Of The Mode Shape Amplitude Dependence And The Spatial Distribution Of Harmonic Distortion

✍ Scribed by R. Benamar; M.M.K. Bennouna; R.G. White

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 658 KB
• Volume: 175
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1994.1335

✦ Synopsis

In this work, the amplitude dependence of the resonance frequency and the spatial distribution of the first and second harmonic components of the dynamic response of a fully clamped rectangular homogeneous plate have been investigated experimentally. By using electrodynamic point excitation at the centre of the plate and a non-contacting optical vibration transducer for response measurement, the spatial distribution of the complex harmonic distortion has been investigated. In order to reach high amplitudes of vibration under distributed loading, a set of tests were also carried out with a progressive wave tunnel, in which the plates tested were subjected to high level acoustic excitation at overall sound pressure levels up to (155 \mathrm{~dB}). The results of such experimental measurements are given and compared with theoretical predictions.