Numerical Simulation of Damping Performance of Elastically Supported Underground Arch Structures Subject to Penetration and Explosion

Table 6

Natural vibration circle frequency of each order of structure (unit: rad/s).

	Rigid support	0	500 k	1000 k	1266.3 k	1500 k	2000 k	2500 k	3000 k
ω1	91.0	3.7	57.6	80.8	90.4	90.6	90.7	90.8	90.8
ω2	182.0	15.1	70.9	89.7	90.4	98.0	111.8	123.5	133.4
ω3	335.8	91.3	91.7	101.1	112.4	121.7	139.5	155.2	169.2
ω4	432.4	188.5	189.2	189.9	190.4	190.8	191.9	193.3	194.9
ω5	476.2	337.3	337.3	337.4	337.4	337.4	337.5	337.6	337.7