Table 1.
Mean ± standard deviation (SD), minimum, maximum, and coefficient of variation of calculated stiffness values (cS) on soft rubber mat I (SRM I), soft rubber mat II (SRM II), and hard rubber mat (HRM) at each of the predefined impact velocities (V). N = number of measurements.
| Floor | V [m∙s−1] |
N | Mean ± SD [kN∙m−1] |
Minimum [kN∙m−1] |
Maximum [kN∙m−1] |
Coefficient of Variation |
|---|---|---|---|---|---|---|
| SRM I | 2 | 12 | 405.2 ± 10.3 | 390.2 | 422.2 | 0.03 |
| 3 | 12 | 500.1 ± 13.7 | 479.3 | 523.6 | 0.03 | |
| 4 | 12 | 594.9 ± 19.0 | 562.9 | 625.0 | 0.03 | |
| SRM II | 2 | 12 | 172.2 ± 7.8 | 157.7 | 186.7 | 0.05 |
| 3 | 12 | 309.1 ± 11.0 | 287.2 | 321.6 | 0.04 | |
| 4 | 12 | 446.1 ± 19.8 | 408.2 | 469.5 | 0.04 | |
| HRM | 2 | 12 | 904.9 ± 40.3 | 822.6 | 966.3 | 0.04 |
| 3 | 12 | 1525.1 ± 40.0 | 1453.9 | 1575.2 | 0.03 | |
| 4 | 12 | 2145.3 ± 49.6 | 2036.4 | 2217.9 | 0.02 |