Dynamic Analysis of Deep Water Highway Tunnel under Ocean Current

Table 7

Natural vibration frequencies of structures with different span lengths (D = 0 m).

Diameter (m)	Span length (m)	Width-span ratio	Frequency (Hz)
			1^st	2^nd	3^rd	4^th	5^th	6^th
10	100	0.100	0.73518	1.3421	1.5647	2.1748	2.4161	4.2544
	150	0.067	0.57205	0.63435	0.77965	1.1656	1.3685	2.1223
	200	0.05	0.36461	0.3882	0.44204	0.66155	0.8898	1.2757
	300	0.033	0.17839	0.223	0.25877	0.3004	0.59778	0.70932
	400	0.025	0.10585	0.12946	0.15788	0.1691	0.36622	0.40606
	450	0.022	0.083829	0.10547	0.12612	0.13562	0.28867	0.32777