Flambement d'une chaîne d'aimants permanents dans un champ magnétique extérieur

Joosung Lee (1) , Jean Boisson (1) , Corinne Rouby (1) , Olivier Doaré (1)

1 UME - Unité de Mécanique

Above a certain number of magnets, a vertical clamped-free chain buckles under its own weight. This instabiliy can be countered by an external magnetic field. To investigate the effect of an external magnetic field on the chain stability, the dynamics of the chain is modelized using a Lagrangian approach, accounting the magnetic interaction between the cylinders, gravity and the external magnetic field. Eigenfrequencies are determined for diffrents magnetic field magnitudes and are compared to experiments. By analyzing the results, the influence of magnetic fields on the self-buckling chain is finally identified.

Mots clés: aimant permanent; stabilité; dynamique des systèmes discrets; magnétostatique

Domaines: Mécanique [physics]

Joosung Lee, Jean Boisson, Corinne Rouby, Olivier Doaré. Flambement d'une chaîne d'aimants permanents dans un champ magnétique extérieur. CFM 2015 - 22ème Congrès Français de Mécanique, Aug 2015, Lyon, France. ⟨hal-01411944v1⟩