Eigenfrequency analysis of thin-walled girders curved in plan

An analytical procedure is proposed for the evaluation of the eigenfrequenc ies of a thin-walled beam curved in plan in response to transverse bending and torsion with various boundary conditions. The analysis is performed thr ough the introduction of four non-dimensionalized geometric parameters whic h govern the dynamic behaviour of the beam. These parameters lead to an equ ally non-dimensionalized eigenfrequency parameter through an appropriate tr eatment of the differential equations on the basis of a computer program sp ecially developed for this purpose. This program is also applied to investi gate the influence of the aforementioned parameters on the eigenfrequency b ehaviour of a thin-walled girder. (C) 1999 Academic Press.