The Optimization Algorithm for Large-Scale In Situ Stress Field

Table 2

The sample stress got by reduced order model and full order model.

Element number	Horizontal stress			Vertical stress			Shear stress
	Sample stress (Pa)	Error of POD	Error of FOM	Sample stress (Pa)	Error of POD	Error of FOM	Sample stress(Pa)	Error of POD	Error of FOM
50233	−3.83 × 10^6	0.522%	0.783%	−1.01 × 10^7	0	0	−3.21 × 10^6	0	0.312%
52449	−3.65 × 10^6	0.274%	0.822%	−1.00 × 10^7	0.200%	0	−3.14 × 10^6	0	0.318%
103867	−3.01 × 10^6	0	1.66%	−7.72 × 10^6	0.130%	0.130%	−2.47 × 10^6	0	0.405%
107093	−3.50 × 10^6	0.571%	0.857%	−8.51 × 10^6	0.470%	0	−2.76 × 10^6	0	0.362%
155967	−2.99 × 10^6	0.334%	1.67%	−6.09 × 10^6	0.164%	0.164%	−2.09 × 10^6	0	0.478%
164215	−3.14 × 10^6	0.637%	0.955%	−6.84 × 10^6	0.439%	0	−2.30 × 10^6	0.435%	0
200542	−2.93 × 10^6	0.683%	1.02%	−5.68 × 10^6	0.352%	0	−1.98 × 10^6	0	0.505%
200901	−2.98 × 10^6	0.671%	0.671%	−5.17 × 10^6	0.193%	0.193%	−1.87 × 10^6	0.535%	0.535%