Table 1 Geometric specifications of the fan.
From: A study of the effect of motor structural components on harmonic noise
Modal Order | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
|---|---|---|---|---|---|---|---|
Original Program(Hz) | 73.6 | 89.1 | 95.1 | 109.5 | 138.9 | 172 | 216.1 |
OptimizeProgram(Hz) | 73.9 | 90 | 95.6 | 109.6 | 146 | 173 | 236.2 |
