Here are the nominal parameters of the disk with flats
Parameter |
Value |
Diameter (nominal) |
75.0 mm |
Thickness (nominal) |
1.00 mm |
Distance of flats from center of disk
(as measured by MO) |
36.05 mm |
Young's modulus (from G1601850) |
72.3 GPa |
Poisson's ratio (from G1601850) |
0.164 |
Density |
2202 kg/m^3 |
A COMSOL simulation gives the frequencies and mode shapes shown in the attached PDF file. Following the list of frequencies and a classification of the mode family (numer of radial nodes, number of azimuthal nodes in a half turn):
Frequency [Hz] |
Radial |
Azimuthal |
1089.7 |
0 |
2 |
1109.1 |
0 |
2 |
1661.1 |
1 |
0 |
2501.3 |
0 |
3 |
2542.3 |
0 |
3 |
3837.7 |
1 |
1 |
3909.8 |
1 |
1 |
4359.9 |
0 |
4 |
4421.2 |
0 |
4 |
6656 |
0 |
5 |
6665.3 |
1 |
2 |
6732.7 |
0 |
5 |
6780 |
1 |
2 |
7283.9 |
2 |
0 |
9381.5 |
0 |
6 |
9470.6 |
0 |
6 |
10054.1 |
1 |
3 |
10210.2 |
1 |
3 |
11244.2 |
2 |
1 |
11414.2 |
2 |
1 |
12528.4 |
0 |
7 |
12655.4 |
0 |
7 |
13970.1 |
1 |
4 |
14148.9 |
1 |
4 |
15854.8 |
2 |
2 |
15856.8 |
2 |
2 |
16101.1 |
0 |
8 |
16227.8 |
3 |
0 |
16853.9 |
3 |
0 |
18387.2 |
1 |
5 |
18562.6 |
1 |
5 |
19984.9 |
0 |
9 |
20045.8 |
0 |
9 |
21067.2 |
2 |
3 |
21358.1 |
2 |
3 |
22300.9 |
3 |
1 |
22848.8 |
3 |
1 |
23270.5 |
1 |
6 |
23419.4 |
1 |
6 |
24374.1 |
0 |
10 |
24425.2 |
0 |
10 |
26793.8 |
2 |
4 |
27083.9 |
2 |
4 |
28533.5 |
1 |
7 |
28637.8 |
1 |
7 |
28692 |
3 |
2 |
28998.5 |
4 |
0 |
29228.3 |
0 |
11 |
29271.9 |
0 |
11 |
29870.1 |
4 |
0 |
33040 |
2 |
5 |
33301.4 |
2 |
5 |
33949.1 |
0 |
12 |
33986.5 |
0 |
12 |
|