PSI - Issue 24

Stefano Porziani et al. / Procedia Structural Integrity 24 (2019) 724–737

733

10

S. Porziani et al. / Structural Integrity Procedia 00 (2019) 000–000

a)

b) Fig. 7. Simple thick plate optimisation results: a) using linear interpolation; b) using irrational interpolation

mass reduction a realisable target, with the adjoint driven surface sculpting the nodes are only moved, no element is e ff ectively eliminated and the mass reduction amount is therefore lower than the expected value.

a)

b) Fig. 8. Simple thick plate optimised first mode shape: a) using linear interpolation; b) using irrational interpolation

Table 4. Simple thick plate result comparison Mode n. Baseline Frequency [Hz]

Linear interpolation frequency [Hz]

Irrational interpolation frequency [Hz]

1 2 3 4 5 6

1457.3 1542.3 3159.1 3799.8 3816.2 4514.7

1315.6 1402.2 2579.7 3238.1 3314.0 3820.0

1351.5 1440.7 2616.5 3273.3 3344.7 3874.0

4. Industrial component optimisation

4.1. Adjoint driven surface sculpting

Results for the adjoint driven mesh morphing optimisation applied to the industrial component are here presented. The applied method allowed to obtain interesting results in terms of mass reduction aiming at maintaining unchanged the stress levels. Acting on the component zone highlighted in Fig. 9a, the mesh morphing driven by topological optimisation tool adjoint data allowed to obtain a stress reduction of 11 . 7% in terms of maximum stress.