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Table 4 Resonance frequencies obtained by experimental tests for Model 3 and Model 4

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

  Mode ω1[Hz] ω2[Hz] ω3[Hz] ω4[Hz] ω5[Hz] ω6[Hz]
Model 3 H 12 33.13 84.38 139.1 211.9 318.1 423.1
H 13 33.13 81.88 124.1 212.5 296.3 418.8
H 14 33.75 86.88 142.5 222.8 321.9 426.3
Model 4 H 12 36.88 90.31 140.6 216.9 310.3 426.3
H 13 36.88 88.13 126.9 219.1 286.6 427.2
H 14 36.88 94.69 147.8 229.1 312.8 434.1
Δ (*) : H 12 11.32% 7.03% 1.08% 2.36% 2.45% 0.76%
Δ (*) : H 13 11.32% 7.63% 2.26% 3.11% 3.27% 2.01%
Δ (*) : H 14 9.27% 8.99% 3.72% 2.83% 2.83% 1.83%
  1. *Δ = |H(M3) – H(M4)| / H(M3).
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