Vibration Characteristics and Power Flow Analyses of a Ship Propulsion Shafting System with General Support and Thrust Loading

Table 2

The first ten modal frequencies of the original model with F-F and F-C boundary conditions.

Mode order	Boundary condition
	F-F			F-C
	Original model	COMSOL	Diff (%)	Original model	COMSOL	Diff (%)
1	15.341	15.342	0.005	15.381	15.38	0.003
2	16.726	16.740	0.083	38.491	38.49	0.006
3	39.398	39.442	0.111	60.027	60.027	0.001
4	60.086	60.081	0.008	94.812	94.817	0.006
5	92.209	92.20	0.01	124.975	124.94	0.028
6	110.763	110.82	0.052	158.209	158.19	0.012
7	152.492	152.51	0.012	227.067	227.05	0.007
8	218.007	218.03	0.01	298.02	297.94	0.027
9	285.114	285.15	0.013	386.86	386.79	0.018
10	365.787	365.81	0.006	474.613	474.56	0.011