Research Article
Evaluation of the Modal Coupling Effect in Midstory Isolation Systems Based on Random Vibration Analysis
Table 2
Related parameters for the three cases.
| | Parameters | Case 1 | Case 2 | Case 3 |
| | Original parameters | mls (kNs2/m) | 54171 | 23940 | 3630 | | miso (kNs2/m) | 4022 | 4030 | 2540 | | mus (kNs2/m) | 10899 | 47528 | 5930 | | ξiso | 0.235 | 0.20 | 0.20 | | Tls (s) | 0.98 | 1.06 | 0.6 | | Tiso (s) | 2.60 | 3.90 | 3.00 | | Tus (s) | 0.21 | 2.18 | 1.11 |
| | Calculated parameters | r1 | 0.22 | 0.68 | 0.70 | | r2 | 0.73 | 0.92 | 0.70 | | ωiso (rad/s) | 2.42 | 1.61 | 2.09 | | εls | 2.7 | 3.7 | 5.0 | | εus | 12.4 | 1.8 | 2.7 |
|
|
ωiso and Tiso are the frequency and period of the upper isolation system, respectively.
|
