Research Article
Theoretical Modelling and Effectiveness Study of Slotted Stand-Off Layer Damping Treatment for Rail Vibration and Noise Control
Table 2
Damping ratio η of the seven cases.
| Frequency | Case 1 | Case 2 | Case 3 | Case 4 | Case 5 | Case 6 | Case 7 |
| 100 | 0.018 | 0.017 | 0.019 | 0.021 | 0.025 | 0.024 | 0.028 | 200 | 0.022 | 0.023 | 0.024 | 0.026 | 0.031 | 0.031 | 0.035 | 600 | 0.033 | 0.031 | 0.034 | 0.035 | 0.044 | 0.042 | 0.044 | 1000 | 0.041 | 0.042 | 0.044 | 0.048 | 0.059 | 0.061 | 0.065 | 1300 | 0.132 | 0.128 | 0.119 | 0.129 | 0.163 | 0.156 | 0.187 | 1500 | 0.209 | 0.231 | 0.221 | 0.248 | 0.287 | 0.293 | 0.358 | 2100 | 0.164 | 0.163 | 0.171 | 0.187 | 0.212 | 0.218 | 0.269 | 2500 | 0.132 | 0.128 | 0.162 | 0.158 | 0.176 | 0.175 | 0.218 | 2700 | 0.121 | 0.130 | 0.152 | 0.175 | 0.185 | 0.194 | 0.191 | 3100 | 0.108 | 0.121 | 0.132 | 0.154 | 0.146 | 0.144 | 0.132 | 3400 | 0.290 | 0.321 | 0.414 | 0.374 | 0.392 | 0.389 | 0.432 | 3700 | 0.415 | 0.436 | 0.356 | 0.498 | 0.564 | 0.544 | 0.614 | 4000 | 0.479 | 0.387 | 0.412 | 0.453 | 0.534 | 0.512 | 0.587 |
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