Mass identification from lambdamatrices in structural dynamics

Summary The discretization of vibration problems in structural dynamics by means of fundamental solutions results in a nonlinear representation by so-called lambdamatrices.Here the dynamic stiffness matrix with transcendental elements is replaced by a linear eigenvalue formulation with static stiffness and a mass matrix. The mass results from interpolating the lambdamatrix either in a Taylor-like or in a Lagrange-like manner.For the present the essential steps of this procedure are demonstrated for vibrations of beams.