Vibration Characteristics Analysis of Cylindrical Shell-Plate Coupled Structure Using an Improved Fourier Series Method

Table 3

The frequency of the coupled structures with different coupling-junction positions /Hz.

Mode	1/4			1/3			1/2
	Current	Ansys	Errors	Current	Ansys	Errors	Current	Ansys	Errors
	88.13	87.64	0.56	88.02	87.74	0.32	88.21	87.64	0.65
	178.87	177.84	0.58	178.66	178.04	0.35	179.04	177.85	0.67
	178.87	177.84	0.58	178.66	178.04	0.35	179.04	177.85	0.67
	219.62	219.48	0.06	250.24	250.21	0.01	293.83	291.74	0.72
	219.62	219.48	0.06	250.24	250.21	0.01	293.83	291.88	0.67
	241.26	241.34	0.03	255.51	255.74	0.09	295.67	295.76	0.03
	241.26	241.34	0.03	255.51	255.74	0.09	295.67	295.76	0.03
	288.70	288.05	0.23	293.26	292.05	0.41	329.87	329.98	0.03
	288.70	288.05	0.23	293.26	292.18	0.37	329.87	329.98	0.03
	293.58	291.74	0.63	323.94	324.50	0.17	337.94	335.63	0.69
	293.58	291.87	0.59	323.94	324.50	0.17	344.03	344.17	0.04
	317.21	317.44	0.07	337.27	335.97	0.39	344.03	344.17	0.04
	317.21	317.44	0.07	344.43	344.04	0.11	354.59	354.00	0.17
	337.62	335.59	0.61	344.43	344.04	0.11	354.59	354.00	0.17
	419.03	419.07	0.01	427.15	427.34	0.04	375.55	375.48	0.02
	419.03	419.07	0.01	427.15	427.34	0.04	375.55	375.48	0.02
	423.29	423.69	0.09	429.23	428.22	0.24	417.24	415.28	0.47
	423.29	423.69	0.09	429.23	428.22	0.24	417.24	415.28	0.47
	429.66	426.91	0.64	449.12	449.47	0.08	429.95	426.86	0.72
	429.66	426.91	0.64	449.12	449.47	0.08	429.95	426.86	0.72