Abstract

G = system geometric stiffness matrix K = system stiffness matrix M = system mass matrix N = axial or in-plane compressive periodic load Ncr = buckling load Ns = constant part of N Nt = periodic part of N = Ns=Ncr = Nt=Ncr f g = as given in Eq. (7) f 1g = eigenvector of the dynamic stability problem f 2g = eigenvector of the free vibration problem f 3g = eigenvector of the buckling problem = radian frequency of Nt = as defined in Eq. (12) = =! ! = natural radian frequency

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