Table 2 Coefficients of the 2 d.o.f. Galerkin reduced-order model

From: Internal resonance in the higher-order modes of a MEMS beam: experiments and global analysis

Eq. \({u}_{1}\) \({u}_{2}\) \({u}_{1}^{3}\) \({u}_{2}^{3}\) \({{u}_{1}u}_{2}^{2}\) \({u}_{2}{u}_{1}^{2}\)
1st 28,904.48 0 4751.08 ka 2596.57 ka 13,458.19 ka 2828.61 ka
2nd 0 127,495.86 942.87 ka 36,031.83 ka 7789.70 ka 13,458.19 ka
  1. The first row refers to the third mode, the second row to the fifth one