Numéro : 2807 - Year : 2024
Hybrid structural health monitoring of August Benebig
Jean-Marc QUENEZ, Service du Soutien de la Flotte, Marine Nationale
de Jérôme, LAUZON Alexandru ANDONIU, Lucas TESSIER, Bureau Veritas Marine & Offshore, Département Recherche
Mathieu RETHORE, DGATN
The Hybrid Structural Health Monitoring strategy is applied to the Auguste Benebig patroller. This monitoring consists of 8 deformation sensors located along the ship beam. This base is supplemented by virtual sensors calculated through via a conversion matrix approach from the 8 physical sensors based on the assumption that the total deformation of the ship can be decomposed on a limited number of deformation modes. Local deformation is obtained by refining the mesh in the locations of the additional points of interest. The article focuses on the pragmatic aspect: refinement of the mesh, construction of transfer matrix as well as the recovery of the data, its transfer from Nouméa to the Metropole and the classification of this data before use.
This approach reconciles measurement (the theory based solely on measurement sensors) and calculation (the theory of Virtual Hull Monitoring which states that sensors are not necessary, and that fatigue can be calculated with modern tools from the ship’s structural mesh, course and speed history, by recovering the sea states from the position history and by performing a sea-keeping hydro-structural analysis).
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