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Table 3 Resonance frequencies obtained by experimental tests for Model 1 and Model 2

From: Experimental analyses of metal-composite bonded joints: damage identification

  Mode ω1[Hz] ω2[Hz] ω3[Hz] ω4[Hz] ω5[Hz] ω6[Hz]
Model 1 H 12 33.44 81.25 135.9 208.1 313.4 416.9
H 13 33.75 79.69 125.9 205.0 292.2 412.5
Model 2 H 12 33.13 83.44 131.3 209.4 295.6 418.4
H 13 33.13 80.94 117.2 214.4 275.6 418.8
Δ (*) : H 12 0.93% 2.70% 3.38% 0.62% 5.68% 0.36%
Δ (*) : H 13 1.84% 1.57% 6.91% 4.59% 5.68% 1.53%
  1. *Δ = |H(M1) – H(M2)| / H(M1).