Stabilization of Buckled Beam with Coulomb Friction by High-Frequency Excitation

The paper deals with the effect of high-frequency excitation on the buckling of a hinged-hinged beam. The hinged supporting points suffer the bending moment due to Coulomb friction. Even if it is very small, in the neighborhood of the critical point of the buckling, it has been known that the stable equilibrium region appears around the branches in the case without Coulomb friction. In this paper, it is theoretically clarified that the equilibrium region is shifted by high-frequency excitation.