Efficient importance analysis methods for structures with distribution parameter uncertainty based on cubature formula | Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University

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表3

算例3.1的重要性测度指标的计算结果

重要性指标	MC	QMC	e_QMC/%	S-DLCF	e_S-DLCF/%	S-SLCF	e_S-SLCF/%
S_iM	μ₁	0.564 78	0.555 97	1.56	0.564 70	0.01	0.564 31	0.08
	μ₂	0.140 33	0.138 80	1.09	0.139 50	0.59	0.141 70	0.98
	μ₃	0.289 78	0.288 22	0.54	0.288 80	0.34	0.291 40	0.56
S^TiM	μ₁	0.562 39	0.562 52	0.02	0.564 08	0.30	0.562 05	0.06
	μ₂	0.140 19	0.140 71	0.37	0.141 34	0.82	0.140 56	0.26
	μ₃	0.286 15	0.278 75	2.59	0.285 11	0.36	0.291 40	1.83
S_iD	μ₁	0.003 70	0.005 28	42.58	0.003 68	0.64	0.004 02	8.37
	μ₂	0.305 42	0.305 32	0.03	0.304 03	0.45	0.309 11	1.21
	μ₃	0.642 13	0.641 64	0.08	0.642 20	0.01	0.641 69	0.07
S_iD^T	μ₁	0.053 31	0.054 44	2.11	0.052 28	1.93	0.052 64	1.26
	μ₂	0.373 15	0.384 33	3.00	0.377 33	1.12	0.372 86	0.08
	μ₃	0.675 23	0.683 41	1.21	0.679 97	0.70	0.679 52	0.64

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