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This work presents a study on dynamics of homocinetic half-shaft with constant velocity joints using experimental modal analysis. The first topic shows the development of a test rig that allows a representative simulation of the dynamic conditions imposed by the vehicle to the component concerning its first bending mode. Further, it is presented the development of an interative routine that allows the update of an analytical model that represents a dynamic behaviour based on experimental data.

This paper describes the use of the transfer matrix method (T.M.M.)for the evaluation of in-plane flexural vibrations of half-shafts and, with the purpose of representing the concentrated damping and the articulation freedom of the constant velocity (C.V.) joints, a model is proposed. A software using the TMM was developed and the results obtained from frequency calculations are compared with those obtained by experimental modal analysis in three different situations: at the test rig on the laboratory, at the vehicle on the laboratory and at the vehicle on the field.