Theoretical Study of Finite Amplitude Standing Waves in Rectangular Cavities with Perturbed Boundaries.
Abstract
The effects of various geometrical boundary perturbations on finite-amplitude acoustical standing waves in a rectangular, rigid-walled cavity were investigated using non-linear theory. The standing waves that exist in an ideal cavity must be corrected when the boundaries are irregular. Three specific examples (stepped, linear and wedged perturbations) were worked out to demonstrate the corrections (in first order) near degeneracies for small perturbations. Those specific examples were compared to the experiments. The present theoretical model qualitatively predicts the effect of the perturbations on the behavior of the nonlinearly generated second harmonic. However, there are unexplained quantitative discrepancies between experiment and theory for a couple of cases. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1978
- Accession Number
- ADA066356
Entities
People
- Mehmet Yalçın Aydın
Organizations
- Naval Postgraduate School