Structural boundary conditions are very important as the part of a structural dynamic system because they are responsible for the dynamic characteristics of the structure system. Thus it is very often to experience that experimental measurements devia...
Structural boundary conditions are very important as the part of a structural dynamic system because they are responsible for the dynamic characteristics of the structure system. Thus it is very often to experience that experimental measurements deviate significantly from the analytical predictions for which idealized boundary conditions are usually assummic sped. However, real structural boundary conditions are not so ideal, not perfectly clamped, for instance. Thus this paper introduces an approach to determine the non-ideal structural boundary conditions in the frequency domain. In this method, structural boundary conditions are modeled by the effective dynarings. The effective dynamic spring constants are determined from experimental frequency response functions in conjunction with spectral element method. For both cantilevered and clamped-clamped beams, experiments are conducted to evaluate the present approach of structural boundary conditions identification.