Revisiting the Nonlinear Response of a Plate to Acoustic Loading
Abstract
Accurate prediction of the structural response of stiffened aircraft skins to acoustic loading is necessary for the design of future Air Force vehicles. Response prediction requires time integration of nonlinear models. Recently, methods have emerged where a nonlinear finite element model is reduced to a low-order system of nonlinear equations to better enable the computations. Well-characterized experiments are needed to validate these methods. In a previous study, experimental data from a thin rectangular plate subjected to acoustic loading were compared to model predictions. Poor agreement between the model predictions and the experimental data raised questions concerning the coupling between the structure and the acoustics. The experiment is repeated in this study with modifications to eliminate an acoustic resonance and better observe the structural/acoustic interaction. The results confirm that the modeling methods capture the structural mechanics of the problem, but lack the necessary coupling with the acoustic medium.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 2008
- Accession Number
- ADA507879
Entities
People
- Joseph J. Hollkamp
- Robert W. Gordon
- Timothy J. Beberniss
Organizations
- Air Force Research Laboratory