Squeal Frequency of a Railway Disc Brake Evaluation by FE Analyses

Table 1

First 50 eigenvalues for = 1 MPa and = 6 rad/s.

Mode	Real part of eigenvalue	Frequency		Effective damping ratio
		[rad/s]	[Hz]
1		7127.9	1134.4
2		8189.6	1303.4
3		8622.4	1372.3
4		8923.1	1420.2
5		9079.1	1445.0
6		10712	1704.9
7	18.409	10716	1705.5	−0.00344
8		14128	2248.5
9	124.07	14135	2249.7	−0.0175
10		19068	3034.8
11	240.46	19073	3035.5	−0.0252
12		22112	3519.2
13		25145	4001.9
14	441.66	25149	4002.6	−0.0351
15	5.235	28059	4465.8	−0.00037
16		28061	4466.0
17		32053	51015.4
18	724.22	32057	5102.1	−0.0452
19		34165	5509.1
20		38163	6073.9
21	1161.2	39509	6288.0	−0.0588
22		39515	6289.0
23		39967	6360.9
24		39968	6361.2
25		43009	6845.0
26		44254	7043.2
27		44715	7116.6
28	229.31	46747	7440.0	−0.00981
29		46917	7467.1
30		47214	7514.3	0.899
31	1979.6	47217	7514.8	−0.0838
32		49954	7950.5
33		49968	7952.6
34	652.73	50113	7975.8	−0.0260
35		50182	7986.7
36	4130.2	53460	8508.4	−0.154
37		53473	8510.4
38		53686	8544.5
39	1141.7	53829	8567.2	−0.0424
40		55226	8789.5
41		55774	8876.7
42		55863	8890.9
43	2240.1	56065	8923.1	−0.0799
44		56217	8947.3
45		56232	8949.6
46		57182	9100.7
47		57182	9100.7
48		57268	9114.4
49		57429	9140.1
50		59588	9483.8