Mechanism Analysis and Parameter Optimization of Mega-Sub-Isolation System

Table 1

Modal analysis results of mega-sub-isolation system.

Modes	Period (s)	Modal mass participation factors	Cumulative mass participation factors
1	4.7173	0.7828	0.7828
2	2.8245	0.0450	0.8278
3	2.6443	0.0098	0.8376
4	2.5993	0.0018	0.8394
5	1.0868	0.1067	0.9461
6	0.6168	0.0395	0.9856
7	0.4230	0.0112	0.9968
8	0.3417	0.003	0.9998
9	0.3099	0.0003	1.0000