Table 5 The system is compensated so that the 1st 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 | 0.0150 | 590 | 0.0% | 884 | 13% |
650 | 0.0142 | 590 | 0.0% | 913 | 10% |
700 | 0.0136 | 592 | 0.3% | 941 | 7% |
750 | 0.0130 | 591 | 0.2% | 967 | 5% |
800 | 0.0125 | 592 | 0.3% | 992 | 2% |
850 | 0.0120 | 590 | 0% | 1015 | 0% |
900 | 0.0116 | 591 | 0.2% | 1038 | 2% |
950 | 0.0112 | 590 | 0.0% | 1059 | 4% |
1000 | 0.0109 | 592 | 0.3% | 1080 | 6% |
1050 | 0.0105 | 589 | 0.2% | 1098 | 8% |
1100 | 0.0102 | 589 | 0.2% | 1117 | 10% |