Gearbox Low-Noise Design Method Based on Panel Acoustic Contribution

Table 2

The gear box natural frequencies (Hz).

Mode steps	Original model	Plan 1	Plan 2
1st	716.5	791.2	770.7
2nd	1518.8	1684.4	1631.8
3rd	1682.3	1847.2	1800.1
4th	1843.7	2138.1	2001.4
5th	2459	2887	2765.3
6th	2881.6	3178.4	3010.8
7th	2887.3	3431.6	3259.4
8th	3043.9	3434.3	3276.9