On the Ostrogradski instability for higher-order derivative theories and a pseudo-mechanical energy - Stephen, N.G. (Journal of sound and vibration, 2008)
Keywords: Exact sciences and technology; Fundamental areas of phenomenology (including applications); Physics; Solid mechanics; Structural and continuum mechanics; Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...); Lagrangian; Vibration; Aeroelastic flutter; System with two degrees of freedom; Modeling; Spring mass system; Viscous damping; Natural frequency; Energy conversion; Hamiltonian mechanics; Aeroelasticity; Non linear effect; Vibrational mode; Energy transfer