Natural Frequency Analysis of Two Nonlinear Panels Coupled with a Cavity Using the Approximate Elliptic Integral Solution and the Method of Harmonic Residual Minimization

摘要: The nonlinear structural acoustic problem considered in this study is the natural frequency analysis of flexible double panels using elliptic integral solution method. There are very limited studies for structural-acoustic problem, although many plate or linear panel problems have been tackled and solved. A multistructural/acoustic modal formulation derived from two coupled partial differential equations which represent large amplitude vibrations pressure induced within air gap. One von Karman’s equation other homogeneous wave equation. results obtained proposed method approach verified with those a numerical effects vibration amplitude, gap width, aspect ratio, numbers modes harmonic terms, so forth on resonant frequencies in-phase out phase examined.