Reliability-Based Topology Optimization Using Stochastic Response Surface Method with Sparse Grid Design

Table 8

Approximated limit state function constructed by SRSM in PMA.

Iteration
1	−0.6505	0.1861	−0.3425	−0.0188	0.0356	−0.0174
2	−0.1788	0.1329	−0.2446	−0.0134	0.0254	−0.0124
203	0.3762	0.0703	−0.1294	−0.0071	0.0135	−0.0066
204	0.3762	0.0703	−0.1294	−0.0071	0.0135	−0.0066

Approximated limit state function: = a₀ + a₁u₁ + a₂u₂ + a₃(  − 1) + a₄u₁u₂ + a₅(  − 1).