Research Article

Isomap-Based Three-Dimensional Operational Modal Analysis

Table 11

RDT and NExT results with a real modal damping ratio of 0.1.

Real orderIdentified orderReal modal ratio = 0.1
PCA (MDS)Isomap
LSMSDMALSMSDMA
RDTNExTRDTNExTRDTNExTRDTNExT

120.05320.05670.05870.06240.05100.05670.06050.0627
210.11550.12410.10450.11390.11360.12450.10740.1139
330.06680.06390.06500.06050.06820.06450.06530.0612
440.07160.08470.08690.09670.07700.08370.09560.0971
560.07420.07580.07480.0759
750.10790.11920.13080.13510.13690.13880.14730.1420