Isomap-Based Three-Dimensional Operational Modal Analysis

Table 9

Comparison of modal frequencies for different neighbor numbers K.

Real order		1	2	3	4	5	7
Identify order		2	1	3	4	6	5
K = 12	LSMS	1052	1146	1237	1441	—	1874
	DMA	1059	1145	1243	1441	—	1874
K = 40	LSMS	1059	1145	1237	1441	—	1874
	DMA	1059	1149	1237	1441	—	1874
K = 200	LSMS	1059	1145	1237	1443	—	1868
	DMA	1059	1149	1237	1443	—	1868
K = 500	LSMS	1059	1145	1237	1443	—	1868
	DMA	1059	1149	1237	1443	—	1868
K = 800	LSMS	1059	1146	1237	1443	—	1868
	DMA	1059	1149	1237	1443	—	1868
	FEA	1054.9	1145.7	1239.6	1441.9	1740.0	1871.7