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Message ID: 105     Entry time: Thu Sep 1 02:13:33 2016
Author: Gabriele 
Type: Optics 
Category: Characterization 
Subject: Expected frequencies for the 75 mm disks with flats 

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
Attachment 1: allmodes_aggregated.pdf  13.035 MB  Uploaded Thu Sep 1 07:56:50 2016  | Hide | Hide all
allmodes_aggregated.pdf allmodes_aggregated.pdf allmodes_aggregated.pdf allmodes_aggregated.pdf allmodes_aggregated.pdf allmodes_aggregated.pdf
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