Table 6 The system is compensated so that the 4th natural frequency is held constant
From: Can a brace be used to control the frequencies of a plate?
Young’s modulus | Brace thickness | 1st natural frequency | % change of ω 1 from | 4th natural frequency | % change of ω 4 from |
|---|---|---|---|---|---|
E R (MPa) | h b (m) | ω 1 (Hz) | E R = 850 | ω 4 (Hz) | E R = 850 |
600 | 0.0909 | 934 | 58% | 1015 | 0.0% |
650 | 0.0683 | 927 | 57% | 1015 | 0.0% |
700 | 0.0387 | 907 | 54% | 1015 | 0.0% |
750 | 0.0194 | 781 | 32% | 1015 | 0.0% |
800 | 0.0144 | 661 | 12% | 1015 | 0.0% |
850 | 0.0120 | 590 | 0% | 1015 | 0% |
900 | 0.0104 | 541 | 8% | 1015 | 0.0% |
950 | 0.0093 | 508 | 14% | 1015 | 0.0% |
1000 | 0.0084 | 482 | 18% | 1014 | 0.1% |
1050 | 0.0077 | 462 | 22% | 1014 | 0.1% |
1100 | 0.0071 | 446 | 24% | 1014 | 0.1% |