Table 4: Significant natural frequencies of the dome (fixed base).

N	Period	Frequency	Participant mass ratio
	s	Hz	X dir.	Y dir.	Z dir.
2	0.278	3.602	10.0%	45.6%	0.0%
6	0.184	5.423	9.9%	0.4%	0.0%
22	0.134	7.484	2.8%	0.4%	0.0%
24	0.117	8.565	0.0%	0.0%	21.9%
38	0.090	11.156	5.7%	5.6%	0.0%