Nonlinear Normal Modes in a Two-Stage Isolator Using a Modified Finite-Element Galerkin Method

Figure 6

Periodic responses from various approximate invariant manifolds. Top plots: (a) response and for modal coordinates and the corresponding close-up plots of the square regions; bottom plots (b) response and for physical coordinates and the corresponding close-up plots of the square regions. Reference solution is given as solid lines; the solution from manifold of domain is given as green dotted lines; the solution from manifold of domain is given as red dashed lines; the solution from manifold of domain is given as blue dashed-dotted lines.

(a)

(b)