Efficient Midfrequency Analysis of Built-Up Structure Systems with Interval Parameters

Table 6

The relative errors of the bounds of the plate energy and the autospectrum of the driving point displacements for different uncertainty levels ( Hz).

	Uncertainty level	Lower bounds			Upper bounds
		MCS	SIPFEM/SEA	Relative errors (%)	MCS	SIPFEM/SEA	Relative errors (%)
(J)	0.01						0.45
	0.02						3.30
	0.03						9.56
	0.04						17.58
(m^2)	0.01						0
	0.02						5.31
	0.03						14.12
	0.04						24.86