Open Access

Table 2.

Nonlinear softening model results.

Mode k1 (N/m) k2 (N/m) c1 (Ns/m) c2 (Ns/m) α (m)
1 737.8597 728.6555 0.1185 −5.96 10−4 0.0091
2 8867.4 8680.8 0.4239 −1.06 10−4 0.0075

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