A Copula-Based and Monte Carlo Sampling Approach for Structural Dynamics Model Updating with Interval Uncertainty

Table 4

Comparison on the natural frequencies of the transport mirror system between the simulation and the experimental results.

Mode	Experimental interval/Hz	Original interval/Hz	Error /%	Updated interval/Hz	Error /%
1	[21.46 21.80]	[22.06 24.24]	[2.77 11.20]	[21.38 22.91]	[-0.36 0.52]
2	[22.09 22.41]	[22.68 24.94]	[2.69 11.31]	[22.00 22.54]	[-0.38 0.59]
3	[41.20 41.81]	[42.03 45.98]	[2.01 9.97]	[40.92 41.85]	[-0.68 0.09]
mean			[2.49 10.83]		[0.47 0.40]