PSI - Issue 38

Amaury Chabod et al. / Procedia Structural Integrity 38 (2022) 382–392 Amaury CHABOD / Structural Integrity Procedia 00 (2021) 000 – 000

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Fig. 6. Measured Strain Gages S(t) time histories for modes 1 to 10. From the modal stresses { } and strain gages measurements {S}(t), modal coordinates, ( ) , are reconstructed as input loads applied measurement, needed as loading for further damage analysis. An additional advantage is that dynamic behavior of structure is already integrated in the strain response, and therefore in computed modal coordinates.

Fig. 7. Modal Coordinates g n (t) time histories for modes 1 to 10.

These modal coordinates may now play the same role as intermediate transient analysis results, with the fundamental difference to have been obtained from test.

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