Fig. 1.

Fig. 2.

Fig. 3.

Fig. 4.

Fig. 5.

Fig. 6.

Fig. 7.

Fig. 8.

Fig. 9.

Fig. 10.

The natural frequencies of the studied model with and without SSI (rad/s)
| Floor | SSI | Fixed |
|---|---|---|
| 1 | 14,514 | 17,236 |
| 2 | 43,162 | 48,295 |
| 3 | 68,091 | 69,789 |










| Floor | SSI | Fixed |
|---|---|---|
| 1 | 14,514 | 17,236 |
| 2 | 43,162 | 48,295 |
| 3 | 68,091 | 69,789 |
© 2025 Reteri Khadidja, Megnounif Abdellatif, published by Bialystok University of Technology
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