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

<div>(a) (Gap width/panel width)<sup>−1</sup> versus frequency ratio (in-phase mode, nine acoustic modes, two harmonic terms). (b) (Cavity depth/width)<sup>−1</sup> versus frequency ratio (out of phase mode, nine acoustic modes, two harmonic terms). (c) Volume changes of the in-phase and out of phase modes.</div>

Discrete Dynamics in Nature and Society

fig4

Figure 4

Figure 4: Natural Frequency Analysis of Two Nonlinear Panels Coupled with a Cavity Using the Approximate Elliptic Integral Solution and the Method of Harmonic Residual Minimization 

Figure 4 | Natural Frequency Analysis of Two Nonlinear Panels Coupled with a Cavity Using the Approximate Elliptic Integral Solution and the Method of Harmonic Residual Minimization 