Table 2 Natural frequency test results.
Serial number | Inherent frequency/Hz | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Surface A | Frequency of occurrence | Surface B | Frequency of occurrence | Surface C | Frequency of occurrence | ||||
First order | Second order | First order | Second order | First order | Second order | ||||
H1 | 12.5 | 22.5 | 20 | 15.0 | 25.0 | 19 | 12.5 | 22.5 | 20 |
H2 | 12.5 | 22.5 | 19 | 15.0 | 25.0 | 19 | 12.5 | 22.5 | 19 |
H3 | 10.0 | 20.0 | 20 | 15.0 | 25.0 | 20 | 12.5 | 22.5 | 20 |
Y1 | 25.0 | 42.5 | 17 | 32.5 | 45.0 | 18 | 27.5 | 42.5 | 18 |
Y2 | 27.5 | 42.5 | 20 | 32.5 | 45.0 | 20 | 27.5 | 42.5 | 20 |
Y3 | 27.5 | 42.5 | 20 | 32.5 | 45.0 | 20 | 25.0 | 42.5 | 20 |
W1 | 20.0 | 32.5 | 19 | 25.0 | 35.0 | 18 | 20.0 | 32.5 | 19 |
W2 | 20.0 | 32.5 | 20 | 25.0 | 35.0 | 20 | 20.0 | 32.5 | 20 |
W3 | 17.5 | 32.5 | 18 | 25.0 | 35.0 | 18 | 20.0 | 32.5 | 19 |
