Frequency Equations for the In-Plane Vibration of Circular Annular Disks

Table 3

Exact frequency parameters of in-plane vibration of a solid disk with free edge (𝑣=0.3).

Mode	𝑛=1	𝑛=2	𝑛=3	𝑛=4
1	1.6176	1.3877	2.1304	2.7740
2	3.5291	2.5112	3.4517	4.4008
3	4.0474	4.5208	5.3492	6.1396
4	5.8861	5.2029	6.3695	7.4633
5	6.9113	6.7549	7.6186	8.5007
6	7.7980	8.2639	9.3470	10.2350
7	9.6594	8.7342	9.8366	11.0551